src/pdf/instance.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "pdf/instance.h"
   6
   7 #include <algorithm>  // for min()
   8 #define _USE_MATH_DEFINES  // for M_PI
   9 #include <cmath>      // for log() and pow()
  10 #include <math.h>
  11 #include <list>
  12
  13 #include "base/json/json_reader.h"
  14 #include "base/json/json_writer.h"
  15 #include "base/logging.h"
  16 #include "base/strings/string_number_conversions.h"
  17 #include "base/strings/string_split.h"
  18 #include "base/strings/string_util.h"
  19 #include "base/values.h"
  20 #include "chrome/browser/chrome_page_zoom_constants.h"
  21 #include "chrome/common/content_restriction.h"
  22 #include "content/public/common/page_zoom.h"
  23 #include "net/base/escape.h"
  24 #include "pdf/draw_utils.h"
  25 #include "pdf/number_image_generator.h"
  26 #include "pdf/pdf.h"
  27 #include "pdf/resource_consts.h"
  28 #include "ppapi/c/dev/ppb_cursor_control_dev.h"
  29 #include "ppapi/c/pp_errors.h"
  30 #include "ppapi/c/pp_rect.h"
  31 #include "ppapi/c/private/ppp_pdf.h"
  32 #include "ppapi/c/trusted/ppb_url_loader_trusted.h"
  33 #include "ppapi/cpp/core.h"
  34 #include "ppapi/cpp/dev/font_dev.h"
  35 #include "ppapi/cpp/dev/memory_dev.h"
  36 #include "ppapi/cpp/dev/text_input_dev.h"
  37 #include "ppapi/cpp/module.h"
  38 #include "ppapi/cpp/point.h"
  39 #include "ppapi/cpp/private/pdf.h"
  40 #include "ppapi/cpp/rect.h"
  41 #include "ppapi/cpp/resource.h"
  42 #include "ppapi/cpp/url_request_info.h"
  43 #include "ui/events/keycodes/keyboard_codes.h"
  44
  45 #if defined(OS_MACOSX)
  46 #include "base/mac/mac_util.h"
  47 #endif
  48
  49 namespace chrome_pdf {
  50
  51 struct ToolbarButtonInfo {
  52   uint32 id;
  53   Button::ButtonStyle style;
  54   PP_ResourceImage normal;
  55   PP_ResourceImage highlighted;
  56   PP_ResourceImage pressed;
  57 };
  58
  59 namespace {
  60
  61 // Uncomment following #define to enable thumbnails.
  62 // #define ENABLE_THUMBNAILS
  63
  64 const uint32 kToolbarSplashTimeoutMs = 6000;
  65 const uint32 kMessageTextColor = 0xFF575757;
  66 const uint32 kMessageTextSize = 22;
  67 const uint32 kProgressFadeTimeoutMs = 250;
  68 const uint32 kProgressDelayTimeoutMs = 1000;
  69 const uint32 kAutoScrollTimeoutMs = 50;
  70 const double kAutoScrollFactor = 0.2;
  71
  72 // Javascript methods.
  73 const char kJSAccessibility[] = "accessibility";
  74 const char kJSDocumentLoadComplete[] = "documentLoadComplete";
  75 const char kJSGetHeight[] = "getHeight";
  76 const char kJSGetHorizontalScrollbarThickness[] =
  77     "getHorizontalScrollbarThickness";
  78 const char kJSGetPageLocationNormalized[] = "getPageLocationNormalized";
  79 const char kJSGetVerticalScrollbarThickness[] = "getVerticalScrollbarThickness";
  80 const char kJSGetWidth[] = "getWidth";
  81 const char kJSGetZoomLevel[] = "getZoomLevel";
  82 const char kJSGoToPage[] = "goToPage";
  83 const char kJSGrayscale[] = "grayscale";
  84 const char kJSLoadPreviewPage[] = "loadPreviewPage";
  85 const char kJSOnLoad[] = "onload";
  86 const char kJSOnPluginSizeChanged[] = "onPluginSizeChanged";
  87 const char kJSOnScroll[] = "onScroll";
  88 const char kJSPageXOffset[] = "pageXOffset";
  89 const char kJSPageYOffset[] = "pageYOffset";
  90 const char kJSPrintPreviewPageCount[] = "printPreviewPageCount";
  91 const char kJSReload[] = "reload";
  92 const char kJSRemovePrintButton[] = "removePrintButton";
  93 const char kJSResetPrintPreviewUrl[] = "resetPrintPreviewUrl";
  94 const char kJSSendKeyEvent[] = "sendKeyEvent";
  95 const char kJSSetPageNumbers[] = "setPageNumbers";
  96 const char kJSSetPageXOffset[] = "setPageXOffset";
  97 const char kJSSetPageYOffset[] = "setPageYOffset";
  98 const char kJSSetZoomLevel[] = "setZoomLevel";
  99 const char kJSZoomFitToHeight[] = "fitToHeight";
 100 const char kJSZoomFitToWidth[] = "fitToWidth";
 101 const char kJSZoomIn[] = "zoomIn";
 102 const char kJSZoomOut[] = "zoomOut";
 103
 104 // URL reference parameters.
 105 // For more possible parameters, see RFC 3778 and the "PDF Open Parameters"
 106 // document from Adobe.
 107 const char kDelimiters[] = "#&";
 108 const char kNamedDest[] = "nameddest";
 109 const char kPage[] = "page";
 110
 111 const char kChromePrint[] = "chrome://print/";
 112
 113 // Dictionary Value key names for the document accessibility info
 114 const char kAccessibleNumberOfPages[] = "numberOfPages";
 115 const char kAccessibleLoaded[] = "loaded";
 116 const char kAccessibleCopyable[] = "copyable";
 117
 118 const ToolbarButtonInfo kPDFToolbarButtons[] = {
 119   { kFitToPageButtonId, Button::BUTTON_STATE,
 120       PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
 121       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
 122       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
 123   { kFitToWidthButtonId, Button::BUTTON_STATE,
 124       PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
 125       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
 126       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
 127   { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
 128       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
 129       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
 130       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
 131   { kZoomInButtonId, Button::BUTTON_CLICKABLE,
 132       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN,
 133       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_HOVER,
 134       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_PRESSED },
 135   { kSaveButtonId, Button::BUTTON_CLICKABLE,
 136       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE,
 137       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_HOVER,
 138       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_PRESSED },
 139   { kPrintButtonId, Button::BUTTON_CLICKABLE,
 140       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT,
 141       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_HOVER,
 142       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_PRESSED },
 143 };
 144
 145 const ToolbarButtonInfo kPDFNoPrintToolbarButtons[] = {
 146   { kFitToPageButtonId, Button::BUTTON_STATE,
 147       PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
 148       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
 149       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
 150   { kFitToWidthButtonId, Button::BUTTON_STATE,
 151       PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
 152       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
 153       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
 154   { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
 155       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
 156       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
 157       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
 158   { kZoomInButtonId, Button::BUTTON_CLICKABLE,
 159       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN,
 160       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_HOVER,
 161       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_PRESSED },
 162   { kSaveButtonId, Button::BUTTON_CLICKABLE,
 163       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE,
 164       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_HOVER,
 165       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_PRESSED },
 166   { kPrintButtonId, Button::BUTTON_CLICKABLE,
 167       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED,
 168       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED,
 169       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED }
 170 };
 171
 172 const ToolbarButtonInfo kPrintPreviewToolbarButtons[] = {
 173   { kFitToPageButtonId, Button::BUTTON_STATE,
 174       PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
 175       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
 176       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
 177   { kFitToWidthButtonId, Button::BUTTON_STATE,
 178       PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
 179       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
 180       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
 181   { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
 182       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
 183       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
 184       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
 185   { kZoomInButtonId, Button::BUTTON_CLICKABLE,
 186       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END,
 187       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END_HOVER,
 188       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END_PRESSED },
 189 };
 190
 191 static const char kPPPPdfInterface[] = PPP_PDF_INTERFACE_1;
 192
 193 PP_Var GetLinkAtPosition(PP_Instance instance, PP_Point point) {
 194   pp::Var var;
 195   void* object =
 196       pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
 197   if (object)
 198     var = static_cast<Instance*>(object)->GetLinkAtPosition(pp::Point(point));
 199   return var.Detach();
 200 }
 201
 202 void Transform(PP_Instance instance, PP_PrivatePageTransformType type) {
 203   void* object =
 204       pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
 205   if (object) {
 206     Instance* obj_instance = static_cast<Instance*>(object);
 207     switch (type) {
 208       case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CW:
 209         obj_instance->RotateClockwise();
 210         break;
 211       case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CCW:
 212         obj_instance->RotateCounterclockwise();
 213         break;
 214     }
 215   }
 216 }
 217
 218 const PPP_Pdf ppp_private = {
 219   &GetLinkAtPosition,
 220   &Transform
 221 };
 222
 223 int ExtractPrintPreviewPageIndex(const std::string& src_url) {
 224   // Sample |src_url| format: chrome://print/id/page_index/print.pdf
 225   std::vector<std::string> url_substr;
 226   base::SplitString(src_url.substr(strlen(kChromePrint)), '/', &url_substr);
 227   if (url_substr.size() != 3)
 228     return -1;
 229
 230   if (url_substr[2] != "print.pdf")
 231     return -1;
 232
 233   int page_index = 0;
 234   if (!base::StringToInt(url_substr[1], &page_index))
 235     return -1;
 236   return page_index;
 237 }
 238
 239 bool IsPrintPreviewUrl(const std::string& url) {
 240   return url.substr(0, strlen(kChromePrint)) == kChromePrint;
 241 }
 242
 243 void ScalePoint(float scale, pp::Point* point) {
 244   point->set_x(static_cast<int>(point->x() * scale));
 245   point->set_y(static_cast<int>(point->y() * scale));
 246 }
 247
 248 void ScaleRect(float scale, pp::Rect* rect) {
 249   int left = static_cast<int>(floorf(rect->x() * scale));
 250   int top = static_cast<int>(floorf(rect->y() * scale));
 251   int right = static_cast<int>(ceilf((rect->x() + rect->width()) * scale));
 252   int bottom = static_cast<int>(ceilf((rect->y() + rect->height()) * scale));
 253   rect->SetRect(left, top, right - left, bottom - top);
 254 }
 255
 256 template<class T>
 257 T ClipToRange(T value, T lower_boundary, T upper_boundary) {
 258   DCHECK(lower_boundary <= upper_boundary);
 259   return std::max<T>(lower_boundary, std::min<T>(value, upper_boundary));
 260 }
 261
 262 }  // namespace
 263
 264 Instance::Instance(PP_Instance instance)
 265     : pp::InstancePrivate(instance),
 266       pp::Find_Private(this),
 267       pp::Printing_Dev(this),
 268       pp::Selection_Dev(this),
 269       pp::WidgetClient_Dev(this),
 270       pp::Zoom_Dev(this),
 271       cursor_(PP_CURSORTYPE_POINTER),
 272       timer_pending_(false),
 273       current_timer_id_(0),
 274       zoom_(1.0),
 275       device_scale_(1.0),
 276       printing_enabled_(true),
 277       hidpi_enabled_(false),
 278       full_(IsFullFrame()),
 279       zoom_mode_(full_ ? ZOOM_AUTO : ZOOM_SCALE),
 280       did_call_start_loading_(false),
 281       is_autoscroll_(false),
 282       scrollbar_thickness_(-1),
 283       scrollbar_reserved_thickness_(-1),
 284       current_tb_info_(NULL),
 285       current_tb_info_size_(0),
 286       paint_manager_(this, this, true),
 287       delayed_progress_timer_id_(0),
 288       first_paint_(true),
 289       painted_first_page_(false),
 290       show_page_indicator_(false),
 291       document_load_state_(LOAD_STATE_LOADING),
 292       preview_document_load_state_(LOAD_STATE_COMPLETE),
 293       told_browser_about_unsupported_feature_(false),
 294       print_preview_page_count_(0) {
 295   loader_factory_.Initialize(this);
 296   timer_factory_.Initialize(this);
 297   form_factory_.Initialize(this);
 298   print_callback_factory_.Initialize(this);
 299   engine_.reset(PDFEngine::Create(this));
 300   pp::Module::Get()->AddPluginInterface(kPPPPdfInterface, &ppp_private);
 301   AddPerInstanceObject(kPPPPdfInterface, this);
 302
 303   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_MOUSE);
 304   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_WHEEL);
 305   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_KEYBOARD);
 306   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_TOUCH);
 307 }
 308
 309 Instance::~Instance() {
 310   if (timer_pending_) {
 311     timer_factory_.CancelAll();
 312     timer_pending_ = false;
 313   }
 314   // The engine may try to access this instance during its destruction.
 315   // Make sure this happens early while the instance is still intact.
 316   engine_.reset();
 317   RemovePerInstanceObject(kPPPPdfInterface, this);
 318 }
 319
 320 bool Instance::Init(uint32_t argc, const char* argn[], const char* argv[]) {
 321   // For now, we hide HiDPI support behind a flag.
 322   if (pp::PDF::IsFeatureEnabled(this, PP_PDFFEATURE_HIDPI))
 323     hidpi_enabled_ = true;
 324
 325   printing_enabled_ = pp::PDF::IsFeatureEnabled(this, PP_PDFFEATURE_PRINTING);
 326   if (printing_enabled_) {
 327     CreateToolbar(kPDFToolbarButtons, arraysize(kPDFToolbarButtons));
 328   } else {
 329     CreateToolbar(kPDFNoPrintToolbarButtons,
 330                   arraysize(kPDFNoPrintToolbarButtons));
 331   }
 332
 333   CreateProgressBar();
 334
 335   // Load autoscroll anchor image.
 336   autoscroll_anchor_ =
 337       CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAN_SCROLL_ICON);
 338
 339 #ifdef ENABLE_THUMBNAILS
 340   CreateThumbnails();
 341 #endif
 342   const char* url = NULL;
 343   for (uint32_t i = 0; i < argc; ++i) {
 344     if (strcmp(argn[i], "src") == 0) {
 345       url = argv[i];
 346       break;
 347     }
 348   }
 349
 350   if (!url)
 351     return false;
 352
 353   CreatePageIndicator(IsPrintPreviewUrl(url));
 354
 355   if (!full_) {
 356     // For PDFs embedded in a frame, we don't get the data automatically like we
 357     // do for full-frame loads.  Start loading the data manually.
 358     LoadUrl(url);
 359   } else {
 360     DCHECK(!did_call_start_loading_);
 361     pp::PDF::DidStartLoading(this);
 362     did_call_start_loading_ = true;
 363   }
 364
 365   ZoomLimitsChanged(kMinZoom, kMaxZoom);
 366
 367   text_input_.reset(new pp::TextInput_Dev(this));
 368
 369   url_ = url;
 370   return engine_->New(url);
 371 }
 372
 373 bool Instance::HandleDocumentLoad(const pp::URLLoader& loader) {
 374   delayed_progress_timer_id_ = ScheduleTimer(kProgressBarId,
 375                                              kProgressDelayTimeoutMs);
 376   return engine_->HandleDocumentLoad(loader);
 377 }
 378
 379 bool Instance::HandleInputEvent(const pp::InputEvent& event) {
 380   // To simplify things, convert the event into device coordinates if it is
 381   // a mouse event.
 382   pp::InputEvent event_device_res(event);
 383   {
 384     pp::MouseInputEvent mouse_event(event);
 385     if (!mouse_event.is_null()) {
 386       pp::Point point = mouse_event.GetPosition();
 387       pp::Point movement = mouse_event.GetMovement();
 388       ScalePoint(device_scale_, &point);
 389       ScalePoint(device_scale_, &movement);
 390       mouse_event = pp::MouseInputEvent(
 391           this,
 392           event.GetType(),
 393           event.GetTimeStamp(),
 394           event.GetModifiers(),
 395           mouse_event.GetButton(),
 396           point,
 397           mouse_event.GetClickCount(),
 398           movement);
 399       event_device_res = mouse_event;
 400     }
 401   }
 402
 403   // Check if we need to go to autoscroll mode.
 404   if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE &&
 405      (event.GetModifiers() & PP_INPUTEVENT_MODIFIER_MIDDLEBUTTONDOWN)) {
 406     pp::MouseInputEvent mouse_event(event_device_res);
 407     pp::Point pos = mouse_event.GetPosition();
 408     EnableAutoscroll(pos);
 409     UpdateCursor(CalculateAutoscroll(pos));
 410     return true;
 411   } else {
 412     // Quit autoscrolling on any other event.
 413     DisableAutoscroll();
 414   }
 415
 416 #ifdef ENABLE_THUMBNAILS
 417   if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSELEAVE)
 418     thumbnails_.SlideOut();
 419
 420   if (thumbnails_.HandleEvent(event_device_res))
 421     return true;
 422 #endif
 423
 424   if (toolbar_->HandleEvent(event_device_res))
 425     return true;
 426
 427 #ifdef ENABLE_THUMBNAILS
 428   if (v_scrollbar_.get() && event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE) {
 429     pp::MouseInputEvent mouse_event(event);
 430     pp::Point pt = mouse_event.GetPosition();
 431     pp::Rect v_scrollbar_rc;
 432     v_scrollbar_->GetLocation(&v_scrollbar_rc);
 433     // There is a bug (https://bugs.webkit.org/show_bug.cgi?id=45208)
 434     // in the webkit that makes event.u.mouse.button
 435     // equal to PP_INPUTEVENT_MOUSEBUTTON_LEFT, even when no button is pressed.
 436     // To work around this issue we use modifier for now, and will switch
 437     // to button once the bug is fixed and webkit got merged back to our tree.
 438     if (v_scrollbar_rc.Contains(pt) &&
 439         (event.GetModifiers() & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN)) {
 440       thumbnails_.SlideIn();
 441     }
 442
 443     // When scrollbar is in the scrolling mode we should display thumbnails
 444     // even the mouse is outside the thumbnail and scrollbar areas.
 445     // If mouse is outside plugin area, we are still getting mouse move events
 446     // while scrolling. See bug description for details:
 447     // http://code.google.com/p/chromium/issues/detail?id=56444
 448     if (!v_scrollbar_rc.Contains(pt) && thumbnails_.visible() &&
 449         !(event.GetModifiers() & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN) &&
 450         !thumbnails_.rect().Contains(pt)) {
 451       thumbnails_.SlideOut();
 452     }
 453   }
 454 #endif
 455
 456   // Need to pass the event to the engine first, since if we're over an edit
 457   // control we want it to get keyboard events (like space) instead of the
 458   // scrollbar.
 459   // TODO: will have to offset the mouse coordinates once we support bidi and
 460   // there could be scrollbars on the left.
 461   pp::InputEvent offset_event(event_device_res);
 462   bool try_engine_first = true;
 463   switch (offset_event.GetType()) {
 464     case PP_INPUTEVENT_TYPE_MOUSEDOWN:
 465     case PP_INPUTEVENT_TYPE_MOUSEUP:
 466     case PP_INPUTEVENT_TYPE_MOUSEMOVE:
 467     case PP_INPUTEVENT_TYPE_MOUSEENTER:
 468     case PP_INPUTEVENT_TYPE_MOUSELEAVE: {
 469       pp::MouseInputEvent mouse_event(event_device_res);
 470       pp::MouseInputEvent mouse_event_dip(event);
 471       pp::Point point = mouse_event.GetPosition();
 472       point.set_x(point.x() - available_area_.x());
 473       offset_event = pp::MouseInputEvent(
 474           this,
 475           event.GetType(),
 476           event.GetTimeStamp(),
 477           event.GetModifiers(),
 478           mouse_event.GetButton(),
 479           point,
 480           mouse_event.GetClickCount(),
 481           mouse_event.GetMovement());
 482       if (!engine_->IsSelecting()) {
 483         if (!IsOverlayScrollbar() &&
 484             !available_area_.Contains(mouse_event.GetPosition())) {
 485           try_engine_first = false;
 486         } else if (IsOverlayScrollbar()) {
 487           pp::Rect temp;
 488           if ((v_scrollbar_.get() && v_scrollbar_->GetLocation(&temp) &&
 489               temp.Contains(mouse_event_dip.GetPosition())) ||
 490               (h_scrollbar_.get() && h_scrollbar_->GetLocation(&temp) &&
 491               temp.Contains(mouse_event_dip.GetPosition()))) {
 492             try_engine_first = false;
 493           }
 494         }
 495       }
 496       break;
 497     }
 498     default:
 499       break;
 500   }
 501   if (try_engine_first && engine_->HandleEvent(offset_event))
 502     return true;
 503
 504   // Left/Right arrows should scroll to the beginning of the Prev/Next page if
 505   // there is no horizontal scroll bar.
 506   // If fit-to-height, PgDown/PgUp should scroll to the beginning of the
 507   // Prev/Next page. Spacebar / shift+spacebar should do the same.
 508   if (v_scrollbar_.get() && event.GetType() == PP_INPUTEVENT_TYPE_KEYDOWN) {
 509     pp::KeyboardInputEvent keyboard_event(event);
 510     bool no_h_scrollbar = !h_scrollbar_.get();
 511     uint32_t key_code = keyboard_event.GetKeyCode();
 512     bool page_down = no_h_scrollbar && key_code == ui::VKEY_RIGHT;
 513     bool page_up = no_h_scrollbar && key_code == ui::VKEY_LEFT;
 514     if (zoom_mode_ == ZOOM_FIT_TO_PAGE) {
 515       bool has_shift =
 516           keyboard_event.GetModifiers() & PP_INPUTEVENT_MODIFIER_SHIFTKEY;
 517       bool key_is_space = key_code == ui::VKEY_SPACE;
 518       page_down |= key_is_space || key_code == ui::VKEY_NEXT;
 519       page_up |= (key_is_space && has_shift) || (key_code == ui::VKEY_PRIOR);
 520     }
 521     if (page_down) {
 522       int page = engine_->GetFirstVisiblePage();
 523       if (page == -1)
 524         return true;
 525       // Engine calculates visible page including delimiter to the page size.
 526       // We need to check here if the page itself is completely out of view and
 527       // scroll to the next one in that case.
 528       if (engine_->GetPageRect(page).bottom() * zoom_ <=
 529           v_scrollbar_->GetValue())
 530         page++;
 531       ScrollToPage(page + 1);
 532       UpdateCursor(PP_CURSORTYPE_POINTER);
 533       return true;
 534     } else if (page_up) {
 535       int page = engine_->GetFirstVisiblePage();
 536       if (page == -1)
 537         return true;
 538       if (engine_->GetPageRect(page).y() * zoom_ >= v_scrollbar_->GetValue())
 539         page--;
 540       ScrollToPage(page);
 541       UpdateCursor(PP_CURSORTYPE_POINTER);
 542       return true;
 543     }
 544   }
 545
 546   if (v_scrollbar_.get() && v_scrollbar_->HandleEvent(event)) {
 547     UpdateCursor(PP_CURSORTYPE_POINTER);
 548     return true;
 549   }
 550
 551   if (h_scrollbar_.get() && h_scrollbar_->HandleEvent(event)) {
 552     UpdateCursor(PP_CURSORTYPE_POINTER);
 553     return true;
 554   }
 555
 556   if (timer_pending_ &&
 557       (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEUP ||
 558        event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE)) {
 559     timer_factory_.CancelAll();
 560     timer_pending_ = false;
 561   } else if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE &&
 562              engine_->IsSelecting()) {
 563     bool set_timer = false;
 564     pp::MouseInputEvent mouse_event(event);
 565     if (v_scrollbar_.get() &&
 566         (mouse_event.GetPosition().y() <= 0 ||
 567          mouse_event.GetPosition().y() >= (plugin_dip_size_.height() - 1))) {
 568       v_scrollbar_->ScrollBy(
 569           PP_SCROLLBY_LINE, mouse_event.GetPosition().y() >= 0 ? 1: -1);
 570       set_timer = true;
 571     }
 572     if (h_scrollbar_.get() &&
 573         (mouse_event.GetPosition().x() <= 0 ||
 574          mouse_event.GetPosition().x() >= (plugin_dip_size_.width() - 1))) {
 575       h_scrollbar_->ScrollBy(PP_SCROLLBY_LINE,
 576           mouse_event.GetPosition().x() >= 0 ? 1: -1);
 577       set_timer = true;
 578     }
 579
 580     if (set_timer) {
 581       last_mouse_event_ = pp::MouseInputEvent(event);
 582
 583       pp::CompletionCallback callback =
 584           timer_factory_.NewCallback(&Instance::OnTimerFired);
 585       pp::Module::Get()->core()->CallOnMainThread(kDragTimerMs, callback);
 586       timer_pending_ = true;
 587     }
 588   }
 589
 590   if (event.GetType() == PP_INPUTEVENT_TYPE_KEYDOWN &&
 591       event.GetModifiers() & kDefaultKeyModifier) {
 592     pp::KeyboardInputEvent keyboard_event(event);
 593     switch (keyboard_event.GetKeyCode()) {
 594       case 'A':
 595         engine_->SelectAll();
 596         return true;
 597     }
 598   }
 599
 600   // Return true for unhandled clicks so the plugin takes focus.
 601   return (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEDOWN);
 602 }
 603
 604 void Instance::DidChangeView(const pp::View& view) {
 605   pp::Rect view_rect(view.GetRect());
 606   float device_scale = 1.0f;
 607   float old_device_scale = device_scale_;
 608   if (hidpi_enabled_)
 609     device_scale = view.GetDeviceScale();
 610   pp::Size view_device_size(view_rect.width() * device_scale,
 611                             view_rect.height() * device_scale);
 612   if (view_device_size == plugin_size_ && device_scale == device_scale_)
 613     return;  // We don't care about the position, only the size.
 614
 615   image_data_ = pp::ImageData();
 616   device_scale_ = device_scale;
 617   plugin_dip_size_ = view_rect.size();
 618   plugin_size_ = view_device_size;
 619
 620   paint_manager_.SetSize(view_device_size, device_scale_);
 621
 622   image_data_ = pp::ImageData(this,
 623                               PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 624                               plugin_size_,
 625                               false);
 626   if (image_data_.is_null()) {
 627     DCHECK(plugin_size_.IsEmpty());
 628     return;
 629   }
 630
 631   // View dimensions changed, disable autoscroll (if it was enabled).
 632   DisableAutoscroll();
 633
 634   OnGeometryChanged(zoom_, old_device_scale);
 635 }
 636
 637 pp::Var Instance::GetInstanceObject() {
 638   if (instance_object_.is_undefined()) {
 639     PDFScriptableObject* object = new PDFScriptableObject(this);
 640     // The pp::Var takes ownership of object here.
 641     instance_object_ = pp::VarPrivate(this, object);
 642   }
 643
 644   return instance_object_;
 645 }
 646
 647 pp::Var Instance::GetLinkAtPosition(const pp::Point& point) {
 648   pp::Point offset_point(point);
 649   ScalePoint(device_scale_, &offset_point);
 650   offset_point.set_x(offset_point.x() - available_area_.x());
 651   return engine_->GetLinkAtPosition(offset_point);
 652 }
 653
 654 pp::Var Instance::GetSelectedText(bool html) {
 655   if (html || !engine_->HasPermission(PDFEngine::PERMISSION_COPY))
 656     return pp::Var();
 657   return engine_->GetSelectedText();
 658 }
 659
 660 void Instance::InvalidateWidget(pp::Widget_Dev widget,
 661                                 const pp::Rect& dirty_rect) {
 662   if (v_scrollbar_.get() && *v_scrollbar_ == widget) {
 663     if (!image_data_.is_null())
 664       v_scrollbar_->Paint(dirty_rect.pp_rect(), &image_data_);
 665   } else if (h_scrollbar_.get() && *h_scrollbar_ == widget) {
 666     if (!image_data_.is_null())
 667       h_scrollbar_->Paint(dirty_rect.pp_rect(), &image_data_);
 668   } else {
 669     // Possible to hit this condition since sometimes the scrollbar codes posts
 670     // a task to do something later, and we could have deleted our reference in
 671     // the meantime.
 672     return;
 673   }
 674
 675   pp::Rect dirty_rect_scaled = dirty_rect;
 676   ScaleRect(device_scale_, &dirty_rect_scaled);
 677   paint_manager_.InvalidateRect(dirty_rect_scaled);
 678 }
 679
 680 void Instance::ScrollbarValueChanged(pp::Scrollbar_Dev scrollbar,
 681                                      uint32_t value) {
 682   value = GetScaled(value);
 683   if (v_scrollbar_.get() && *v_scrollbar_ == scrollbar) {
 684     engine_->ScrolledToYPosition(value);
 685     pp::Rect rc;
 686     v_scrollbar_->GetLocation(&rc);
 687     int32 doc_height = GetDocumentPixelHeight();
 688     doc_height -= GetScaled(rc.height());
 689 #ifdef ENABLE_THUMBNAILS
 690     if (thumbnails_.visible()) {
 691       thumbnails_.SetPosition(value, doc_height, true);
 692     }
 693 #endif
 694     pp::Point origin(
 695         plugin_size_.width() - page_indicator_.rect().width() -
 696             GetScaled(GetScrollbarReservedThickness()),
 697         page_indicator_.GetYPosition(value, doc_height, plugin_size_.height()));
 698     page_indicator_.MoveTo(origin, page_indicator_.visible());
 699   } else if (h_scrollbar_.get() && *h_scrollbar_ == scrollbar) {
 700     engine_->ScrolledToXPosition(value);
 701   }
 702 }
 703
 704 void Instance::ScrollbarOverlayChanged(pp::Scrollbar_Dev scrollbar,
 705                                        bool overlay) {
 706   scrollbar_reserved_thickness_ = overlay ? 0 : scrollbar_thickness_;
 707   OnGeometryChanged(zoom_, device_scale_);
 708 }
 709
 710 uint32_t Instance::QuerySupportedPrintOutputFormats() {
 711   return engine_->QuerySupportedPrintOutputFormats();
 712 }
 713
 714 int32_t Instance::PrintBegin(const PP_PrintSettings_Dev& print_settings) {
 715   // For us num_pages is always equal to the number of pages in the PDF
 716   // document irrespective of the printable area.
 717   int32_t ret = engine_->GetNumberOfPages();
 718   if (!ret)
 719     return 0;
 720
 721   uint32_t supported_formats = engine_->QuerySupportedPrintOutputFormats();
 722   if ((print_settings.format & supported_formats) == 0)
 723     return 0;
 724
 725   print_settings_.is_printing = true;
 726   print_settings_.pepper_print_settings = print_settings;
 727   engine_->PrintBegin();
 728   return ret;
 729 }
 730
 731 pp::Resource Instance::PrintPages(
 732     const PP_PrintPageNumberRange_Dev* page_ranges,
 733     uint32_t page_range_count) {
 734   if (!print_settings_.is_printing)
 735     return pp::Resource();
 736
 737   print_settings_.print_pages_called_ = true;
 738   return engine_->PrintPages(page_ranges, page_range_count,
 739                              print_settings_.pepper_print_settings);
 740 }
 741
 742 void Instance::PrintEnd() {
 743   if (print_settings_.print_pages_called_)
 744     UserMetricsRecordAction("PDF.PrintPage");
 745   print_settings_.Clear();
 746   engine_->PrintEnd();
 747 }
 748
 749 bool Instance::IsPrintScalingDisabled() {
 750   return !engine_->GetPrintScaling();
 751 }
 752
 753 bool Instance::StartFind(const std::string& text, bool case_sensitive) {
 754   engine_->StartFind(text.c_str(), case_sensitive);
 755   return true;
 756 }
 757
 758 void Instance::SelectFindResult(bool forward) {
 759   engine_->SelectFindResult(forward);
 760 }
 761
 762 void Instance::StopFind() {
 763   engine_->StopFind();
 764 }
 765
 766 void Instance::Zoom(double scale, bool text_only) {
 767   UserMetricsRecordAction("PDF.ZoomFromBrowser");
 768   SetZoom(ZOOM_SCALE, scale);
 769 }
 770
 771 void Instance::ZoomChanged(double factor) {
 772   if (full_)
 773     Zoom_Dev::ZoomChanged(factor);
 774 }
 775
 776 void Instance::OnPaint(const std::vector<pp::Rect>& paint_rects,
 777                        std::vector<PaintManager::ReadyRect>* ready,
 778                        std::vector<pp::Rect>* pending) {
 779   if (image_data_.is_null()) {
 780     DCHECK(plugin_size_.IsEmpty());
 781     return;
 782   }
 783   if (first_paint_) {
 784     first_paint_ = false;
 785     pp::Rect rect = pp::Rect(pp::Point(), plugin_size_);
 786     FillRect(rect, kBackgroundColor);
 787     ready->push_back(PaintManager::ReadyRect(rect, image_data_, true));
 788     *pending = paint_rects;
 789     return;
 790   }
 791
 792   engine_->PrePaint();
 793
 794   for (size_t i = 0; i < paint_rects.size(); i++) {
 795     // Intersect with plugin area since there could be pending invalidates from
 796     // when the plugin area was larger.
 797     pp::Rect rect =
 798         paint_rects[i].Intersect(pp::Rect(pp::Point(), plugin_size_));
 799     if (rect.IsEmpty())
 800       continue;
 801
 802     pp::Rect pdf_rect = available_area_.Intersect(rect);
 803     if (!pdf_rect.IsEmpty()) {
 804       pdf_rect.Offset(available_area_.x() * -1, 0);
 805
 806       std::vector<pp::Rect> pdf_ready;
 807       std::vector<pp::Rect> pdf_pending;
 808       engine_->Paint(pdf_rect, &image_data_, &pdf_ready, &pdf_pending);
 809       for (size_t j = 0; j < pdf_ready.size(); ++j) {
 810         pdf_ready[j].Offset(available_area_.point());
 811         ready->push_back(
 812             PaintManager::ReadyRect(pdf_ready[j], image_data_, false));
 813       }
 814       for (size_t j = 0; j < pdf_pending.size(); ++j) {
 815         pdf_pending[j].Offset(available_area_.point());
 816         pending->push_back(pdf_pending[j]);
 817       }
 818     }
 819
 820     for (size_t j = 0; j < background_parts_.size(); ++j) {
 821       pp::Rect intersection = background_parts_[j].location.Intersect(rect);
 822       if (!intersection.IsEmpty()) {
 823         FillRect(intersection, background_parts_[j].color);
 824         ready->push_back(
 825             PaintManager::ReadyRect(intersection, image_data_, false));
 826       }
 827     }
 828
 829     if (document_load_state_ == LOAD_STATE_FAILED) {
 830       pp::Point top_center;
 831       top_center.set_x(plugin_size_.width() / 2);
 832       top_center.set_y(plugin_size_.height() / 2);
 833       DrawText(top_center, PP_RESOURCESTRING_PDFLOAD_FAILED);
 834     }
 835
 836 #ifdef ENABLE_THUMBNAILS
 837     thumbnails_.Paint(&image_data_, rect);
 838 #endif
 839   }
 840
 841   engine_->PostPaint();
 842
 843   // Must paint scrollbars after the background parts, in case we have an
 844   // overlay scrollbar that's over the background. We also do this in a separate
 845   // loop because the scrollbar painting logic uses the signal of whether there
 846   // are pending paints or not to figure out if it should draw right away or
 847   // not.
 848   for (size_t i = 0; i < paint_rects.size(); i++) {
 849     PaintIfWidgetIntersects(h_scrollbar_.get(), paint_rects[i], ready, pending);
 850     PaintIfWidgetIntersects(v_scrollbar_.get(), paint_rects[i], ready, pending);
 851   }
 852
 853   if (progress_bar_.visible())
 854     PaintOverlayControl(&progress_bar_, &image_data_, ready);
 855
 856   if (page_indicator_.visible())
 857     PaintOverlayControl(&page_indicator_, &image_data_, ready);
 858
 859   if (toolbar_->current_transparency() != kTransparentAlpha)
 860     PaintOverlayControl(toolbar_.get(), &image_data_, ready);
 861
 862   // Paint autoscroll anchor if needed.
 863   if (is_autoscroll_) {
 864     size_t limit = ready->size();
 865     for (size_t i = 0; i < limit; i++) {
 866       pp::Rect anchor_rect = autoscroll_rect_.Intersect((*ready)[i].rect);
 867       if (!anchor_rect.IsEmpty()) {
 868         pp::Rect draw_rc = pp::Rect(
 869             pp::Point(anchor_rect.x() - autoscroll_rect_.x(),
 870                       anchor_rect.y() - autoscroll_rect_.y()),
 871             anchor_rect.size());
 872         // Paint autoscroll anchor.
 873         AlphaBlend(autoscroll_anchor_, draw_rc,
 874                    &image_data_, anchor_rect.point(), kOpaqueAlpha);
 875       }
 876     }
 877   }
 878 }
 879
 880 void Instance::PaintOverlayControl(
 881     Control* ctrl,
 882     pp::ImageData* image_data,
 883     std::vector<PaintManager::ReadyRect>* ready) {
 884   // Make sure that we only paint overlay controls over an area that's ready,
 885   // i.e. not pending.  Otherwise we'll mark the control rect as ready and
 886   // it'll overwrite the pdf region.
 887   std::list<pp::Rect> ctrl_rects;
 888   for (size_t i = 0; i < ready->size(); i++) {
 889     pp::Rect rc = ctrl->rect().Intersect((*ready)[i].rect);
 890     if (!rc.IsEmpty())
 891       ctrl_rects.push_back(rc);
 892   }
 893
 894   if (!ctrl_rects.empty()) {
 895     ctrl->PaintMultipleRects(image_data, ctrl_rects);
 896
 897     std::list<pp::Rect>::iterator iter;
 898     for (iter = ctrl_rects.begin(); iter != ctrl_rects.end(); ++iter) {
 899       ready->push_back(PaintManager::ReadyRect(*iter, *image_data, false));
 900     }
 901   }
 902 }
 903
 904 void Instance::DidOpen(int32_t result) {
 905   if (result == PP_OK) {
 906     engine_->HandleDocumentLoad(embed_loader_);
 907   } else if (result != PP_ERROR_ABORTED) {  // Can happen in tests.
 908     NOTREACHED();
 909   }
 910 }
 911
 912 void Instance::DidOpenPreview(int32_t result) {
 913   if (result == PP_OK) {
 914     preview_engine_.reset(PDFEngine::Create(new PreviewModeClient(this)));
 915     preview_engine_->HandleDocumentLoad(embed_preview_loader_);
 916   } else {
 917     NOTREACHED();
 918   }
 919 }
 920
 921 void Instance::PaintIfWidgetIntersects(
 922     pp::Widget_Dev* widget,
 923     const pp::Rect& rect,
 924     std::vector<PaintManager::ReadyRect>* ready,
 925     std::vector<pp::Rect>* pending) {
 926   if (!widget)
 927     return;
 928
 929   pp::Rect location;
 930   if (!widget->GetLocation(&location))
 931     return;
 932
 933   ScaleRect(device_scale_, &location);
 934   location = location.Intersect(rect);
 935   if (location.IsEmpty())
 936     return;
 937
 938   if (IsOverlayScrollbar()) {
 939     // If we're using overlay scrollbars, and there are pending paints under the
 940     // scrollbar, don't update the scrollbar instantly. While it would be nice,
 941     // we would need to double buffer the plugin area in order to make this
 942     // work. This is because we'd need to always have a copy of what the pdf
 943     // under the scrollbar looks like, and additionally we couldn't paint the
 944     // pdf under the scrollbar if it's ready until we got the preceding flush.
 945     // So in practice, it would make painting slower and introduce extra buffer
 946     // copies for the general case.
 947     for (size_t i = 0; i < pending->size(); ++i) {
 948       if ((*pending)[i].Intersects(location))
 949         return;
 950     }
 951
 952     // Even if none of the pending paints are under the scrollbar, we never want
 953     // to paint it if it's over the pdf if there are other pending paints.
 954     // Otherwise different parts of the pdf plugin would display at different
 955     // scroll offsets.
 956     if (!pending->empty() && available_area_.Intersects(rect)) {
 957       pending->push_back(location);
 958       return;
 959     }
 960   }
 961
 962   pp::Rect location_dip = location;
 963   ScaleRect(1.0f / device_scale_, &location_dip);
 964
 965   DCHECK(!image_data_.is_null());
 966   widget->Paint(location_dip, &image_data_);
 967
 968   ready->push_back(PaintManager::ReadyRect(location, image_data_, true));
 969 }
 970
 971 void Instance::OnTimerFired(int32_t) {
 972   HandleInputEvent(last_mouse_event_);
 973 }
 974
 975 void Instance::OnClientTimerFired(int32_t id) {
 976   engine_->OnCallback(id);
 977 }
 978
 979 void Instance::OnControlTimerFired(int32_t,
 980                                    const uint32& control_id,
 981                                    const uint32& timer_id) {
 982   if (control_id == toolbar_->id()) {
 983     toolbar_->OnTimerFired(timer_id);
 984   } else if (control_id == progress_bar_.id()) {
 985     if (timer_id == delayed_progress_timer_id_) {
 986       if (document_load_state_ == LOAD_STATE_LOADING &&
 987           !progress_bar_.visible()) {
 988         progress_bar_.Fade(true, kProgressFadeTimeoutMs);
 989       }
 990       delayed_progress_timer_id_ = 0;
 991     } else {
 992       progress_bar_.OnTimerFired(timer_id);
 993     }
 994   } else if (control_id == kAutoScrollId) {
 995     if (is_autoscroll_) {
 996       if (autoscroll_x_ != 0 && h_scrollbar_.get()) {
 997         h_scrollbar_->ScrollBy(PP_SCROLLBY_PIXEL, autoscroll_x_);
 998       }
 999       if (autoscroll_y_ != 0 && v_scrollbar_.get()) {
1000         v_scrollbar_->ScrollBy(PP_SCROLLBY_PIXEL, autoscroll_y_);
1001       }
1002
1003       // Reschedule timer.
1004       ScheduleTimer(kAutoScrollId, kAutoScrollTimeoutMs);
1005     }
1006   } else if (control_id == kPageIndicatorId) {
1007     page_indicator_.OnTimerFired(timer_id);
1008   }
1009 #ifdef ENABLE_THUMBNAILS
1010   else if (control_id == thumbnails_.id()) {
1011     thumbnails_.OnTimerFired(timer_id);
1012   }
1013 #endif
1014 }
1015
1016 void Instance::CalculateBackgroundParts() {
1017   background_parts_.clear();
1018   int v_scrollbar_thickness =
1019       GetScaled(v_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1020   int h_scrollbar_thickness =
1021       GetScaled(h_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1022   int width_without_scrollbar = std::max(
1023       plugin_size_.width() - v_scrollbar_thickness, 0);
1024   int height_without_scrollbar = std::max(
1025       plugin_size_.height() - h_scrollbar_thickness, 0);
1026   int left_width = available_area_.x();
1027   int right_start = available_area_.right();
1028   int right_width = abs(width_without_scrollbar - available_area_.right());
1029   int bottom = std::min(available_area_.bottom(), height_without_scrollbar);
1030
1031   // Add the left, right, and bottom rectangles.  Note: we assume only
1032   // horizontal centering.
1033   BackgroundPart part = {
1034     pp::Rect(0, 0, left_width, bottom),
1035     kBackgroundColor
1036   };
1037   if (!part.location.IsEmpty())
1038     background_parts_.push_back(part);
1039   part.location = pp::Rect(right_start, 0, right_width, bottom);
1040   if (!part.location.IsEmpty())
1041     background_parts_.push_back(part);
1042   part.location = pp::Rect(
1043       0, bottom, width_without_scrollbar, height_without_scrollbar - bottom);
1044   if (!part.location.IsEmpty())
1045     background_parts_.push_back(part);
1046
1047   if (h_scrollbar_thickness
1048 #if defined(OS_MACOSX)
1049       ||
1050 #else
1051       &&
1052 #endif
1053       v_scrollbar_thickness) {
1054     part.color = 0xFFFFFFFF;
1055     part.location = pp::Rect(plugin_size_.width() - v_scrollbar_thickness,
1056                              plugin_size_.height() - h_scrollbar_thickness,
1057                              h_scrollbar_thickness,
1058                              v_scrollbar_thickness);
1059     background_parts_.push_back(part);
1060   }
1061 }
1062
1063 int Instance::GetDocumentPixelWidth() const {
1064   return static_cast<int>(ceil(document_size_.width() * zoom_ * device_scale_));
1065 }
1066
1067 int Instance::GetDocumentPixelHeight() const {
1068   return static_cast<int>(ceil(document_size_.height() *
1069                                zoom_ *
1070                                device_scale_));
1071 }
1072
1073 void Instance::FillRect(const pp::Rect& rect, uint32 color) {
1074   DCHECK(!image_data_.is_null() || rect.IsEmpty());
1075   uint32* buffer_start = static_cast<uint32*>(image_data_.data());
1076   int stride = image_data_.stride();
1077   uint32* ptr = buffer_start + rect.y() * stride / 4 + rect.x();
1078   int height = rect.height();
1079   int width = rect.width();
1080   for (int y = 0; y < height; ++y) {
1081     for (int x = 0; x < width; ++x)
1082       *(ptr + x) = color;
1083     ptr += stride / 4;
1084   }
1085 }
1086
1087 void Instance::DocumentSizeUpdated(const pp::Size& size) {
1088   document_size_ = size;
1089
1090   OnGeometryChanged(zoom_, device_scale_);
1091 }
1092
1093 void Instance::Invalidate(const pp::Rect& rect) {
1094   pp::Rect offset_rect(rect);
1095   offset_rect.Offset(available_area_.point());
1096   paint_manager_.InvalidateRect(offset_rect);
1097 }
1098
1099 void Instance::Scroll(const pp::Point& point) {
1100   pp::Rect scroll_area = available_area_;
1101   if (IsOverlayScrollbar()) {
1102     pp::Rect rc;
1103     if (h_scrollbar_.get()) {
1104       h_scrollbar_->GetLocation(&rc);
1105       ScaleRect(device_scale_, &rc);
1106       if (scroll_area.bottom() > rc.y()) {
1107         scroll_area.set_height(rc.y() - scroll_area.y());
1108         paint_manager_.InvalidateRect(rc);
1109       }
1110     }
1111     if (v_scrollbar_.get()) {
1112       v_scrollbar_->GetLocation(&rc);
1113       ScaleRect(device_scale_, &rc);
1114       if (scroll_area.right() > rc.x()) {
1115         scroll_area.set_width(rc.x() - scroll_area.x());
1116         paint_manager_.InvalidateRect(rc);
1117       }
1118     }
1119   }
1120   paint_manager_.ScrollRect(scroll_area, point);
1121
1122   if (toolbar_->current_transparency() != kTransparentAlpha)
1123     paint_manager_.InvalidateRect(toolbar_->GetControlsRect());
1124
1125   if (progress_bar_.visible())
1126     paint_manager_.InvalidateRect(progress_bar_.rect());
1127
1128   if (is_autoscroll_)
1129     paint_manager_.InvalidateRect(autoscroll_rect_);
1130
1131   if (show_page_indicator_) {
1132     page_indicator_.set_current_page(GetPageNumberToDisplay());
1133     page_indicator_.Splash();
1134   }
1135
1136   if (page_indicator_.visible())
1137     paint_manager_.InvalidateRect(page_indicator_.rect());
1138
1139   if (on_scroll_callback_.is_string())
1140     ExecuteScript(on_scroll_callback_);
1141 }
1142
1143 void Instance::ScrollToX(int position) {
1144   if (!h_scrollbar_.get()) {
1145     NOTREACHED();
1146     return;
1147   }
1148   int position_dip = static_cast<int>(position / device_scale_);
1149   h_scrollbar_->SetValue(position_dip);
1150 }
1151
1152 void Instance::ScrollToY(int position) {
1153   if (!v_scrollbar_.get()) {
1154     NOTREACHED();
1155     return;
1156   }
1157   int position_dip = static_cast<int>(position / device_scale_);
1158   v_scrollbar_->SetValue(ClipToRange(position_dip, 0, valid_v_range_));
1159 }
1160
1161 void Instance::ScrollToPage(int page) {
1162   if (!v_scrollbar_.get())
1163     return;
1164
1165   if (engine_->GetNumberOfPages() == 0)
1166     return;
1167
1168   int index = ClipToRange(page, 0, engine_->GetNumberOfPages() - 1);
1169   pp::Rect rect = engine_->GetPageRect(index);
1170   // If we are trying to scroll pass the last page,
1171   // scroll to the end of the last page.
1172   int position = index < page ? rect.bottom() : rect.y();
1173   ScrollToY(position * zoom_ * device_scale_);
1174 }
1175
1176 void Instance::NavigateTo(const std::string& url, bool open_in_new_tab) {
1177   std::string url_copy(url);
1178
1179   // Empty |url_copy| is ok, and will effectively be a reload.
1180   // Skip the code below so an empty URL does not turn into "http://", which
1181   // will cause GURL to fail a DCHECK.
1182   if (!url_copy.empty()) {
1183     // If |url_copy| starts with '#', then it's for the same URL with a
1184     // different URL fragment.
1185     if (url_copy[0] == '#') {
1186       url_copy = url_ + url_copy;
1187       // Changing the href does not actually do anything when navigating in the
1188       // same tab, so do the actual page scroll here. Then fall through so the
1189       // href gets updated.
1190       if (!open_in_new_tab) {
1191         int page_number = GetInitialPage(url_copy);
1192         if (page_number >= 0)
1193           ScrollToPage(page_number);
1194       }
1195     }
1196     // If there's no scheme, add http.
1197     if (url_copy.find("://") == std::string::npos &&
1198         url_copy.find("mailto:") == std::string::npos) {
1199       url_copy = "http://" + url_copy;
1200     }
1201     // Make sure |url_copy| starts with a valid scheme.
1202     if (url_copy.find("http://") != 0 &&
1203         url_copy.find("https://") != 0 &&
1204         url_copy.find("ftp://") != 0 &&
1205         url_copy.find("file://") != 0 &&
1206         url_copy.find("mailto:") != 0) {
1207       return;
1208     }
1209     // Make sure |url_copy| is not only a scheme.
1210     if (url_copy == "http://" ||
1211         url_copy == "https://" ||
1212         url_copy == "ftp://" ||
1213         url_copy == "file://" ||
1214         url_copy == "mailto:") {
1215       return;
1216     }
1217   }
1218   if (open_in_new_tab) {
1219     GetWindowObject().Call("open", url_copy);
1220   } else {
1221     GetWindowObject().GetProperty("top").GetProperty("location").
1222         SetProperty("href", url_copy);
1223   }
1224 }
1225
1226 void Instance::UpdateCursor(PP_CursorType_Dev cursor) {
1227   if (cursor == cursor_)
1228     return;
1229   cursor_ = cursor;
1230
1231   const PPB_CursorControl_Dev* cursor_interface =
1232       reinterpret_cast<const PPB_CursorControl_Dev*>(
1233       pp::Module::Get()->GetBrowserInterface(PPB_CURSOR_CONTROL_DEV_INTERFACE));
1234   if (!cursor_interface) {
1235     NOTREACHED();
1236     return;
1237   }
1238
1239   cursor_interface->SetCursor(
1240       pp_instance(), cursor_, pp::ImageData().pp_resource(), NULL);
1241 }
1242
1243 void Instance::UpdateTickMarks(const std::vector<pp::Rect>& tickmarks) {
1244   if (!v_scrollbar_.get())
1245     return;
1246
1247   float inverse_scale = 1.0f / device_scale_;
1248   std::vector<pp::Rect> scaled_tickmarks = tickmarks;
1249   for (size_t i = 0; i < scaled_tickmarks.size(); i++) {
1250     ScaleRect(inverse_scale, &scaled_tickmarks[i]);
1251   }
1252
1253   v_scrollbar_->SetTickMarks(
1254       scaled_tickmarks.empty() ? NULL : &scaled_tickmarks[0], tickmarks.size());
1255 }
1256
1257 void Instance::NotifyNumberOfFindResultsChanged(int total, bool final_result) {
1258   NumberOfFindResultsChanged(total, final_result);
1259 }
1260
1261 void Instance::NotifySelectedFindResultChanged(int current_find_index) {
1262   SelectedFindResultChanged(current_find_index);
1263 }
1264
1265 void Instance::OnEvent(uint32 control_id, uint32 event_id, void* data) {
1266   if (event_id == Button::EVENT_ID_BUTTON_CLICKED ||
1267       event_id == Button::EVENT_ID_BUTTON_STATE_CHANGED) {
1268     switch (control_id) {
1269       case kFitToPageButtonId:
1270         UserMetricsRecordAction("PDF.FitToPageButton");
1271         SetZoom(ZOOM_FIT_TO_PAGE, 0);
1272         ZoomChanged(zoom_);
1273         break;
1274       case kFitToWidthButtonId:
1275         UserMetricsRecordAction("PDF.FitToWidthButton");
1276         SetZoom(ZOOM_FIT_TO_WIDTH, 0);
1277         ZoomChanged(zoom_);
1278         break;
1279       case kZoomOutButtonId:
1280       case kZoomInButtonId:
1281         UserMetricsRecordAction(control_id == kZoomOutButtonId ?
1282             "PDF.ZoomOutButton" : "PDF.ZoomInButton");
1283         SetZoom(ZOOM_SCALE, CalculateZoom(control_id));
1284         ZoomChanged(zoom_);
1285         break;
1286       case kSaveButtonId:
1287         UserMetricsRecordAction("PDF.SaveButton");
1288         SaveAs();
1289         break;
1290       case kPrintButtonId:
1291         UserMetricsRecordAction("PDF.PrintButton");
1292         Print();
1293         break;
1294     }
1295   }
1296   if (control_id == kThumbnailsId &&
1297       event_id == ThumbnailControl::EVENT_ID_THUMBNAIL_SELECTED) {
1298     int page = *static_cast<int*>(data);
1299     pp::Rect page_rc(engine_->GetPageRect(page));
1300     ScrollToY(static_cast<int>(page_rc.y() * zoom_ * device_scale_));
1301   }
1302 }
1303
1304 void Instance::Invalidate(uint32 control_id, const pp::Rect& rc) {
1305   paint_manager_.InvalidateRect(rc);
1306 }
1307
1308 uint32 Instance::ScheduleTimer(uint32 control_id, uint32 timeout_ms) {
1309   current_timer_id_++;
1310   pp::CompletionCallback callback =
1311       timer_factory_.NewCallback(&Instance::OnControlTimerFired,
1312                                  control_id,
1313                                  current_timer_id_);
1314   pp::Module::Get()->core()->CallOnMainThread(timeout_ms, callback);
1315   return current_timer_id_;
1316 }
1317
1318 void Instance::SetEventCapture(uint32 control_id, bool set_capture) {
1319   // TODO(gene): set event capture here.
1320 }
1321
1322 void Instance::SetCursor(uint32 control_id, PP_CursorType_Dev cursor_type) {
1323   UpdateCursor(cursor_type);
1324 }
1325
1326 pp::Instance* Instance::GetInstance() {
1327   return this;
1328 }
1329
1330 void Instance::GetDocumentPassword(
1331     pp::CompletionCallbackWithOutput<pp::Var> callback) {
1332   std::string message(GetLocalizedString(PP_RESOURCESTRING_PDFGETPASSWORD));
1333   pp::Var result = pp::PDF::ModalPromptForPassword(this, message);
1334   *callback.output() = result.pp_var();
1335   callback.Run(PP_OK);
1336 }
1337
1338 void Instance::Alert(const std::string& message) {
1339   GetWindowObject().Call("alert", message);
1340 }
1341
1342 bool Instance::Confirm(const std::string& message) {
1343   pp::Var result = GetWindowObject().Call("confirm", message);
1344   return result.is_bool() ? result.AsBool() : false;
1345 }
1346
1347 std::string Instance::Prompt(const std::string& question,
1348                              const std::string& default_answer) {
1349   pp::Var result = GetWindowObject().Call("prompt", question, default_answer);
1350   return result.is_string() ? result.AsString() : std::string();
1351 }
1352
1353 std::string Instance::GetURL() {
1354   return url_;
1355 }
1356
1357 void Instance::Email(const std::string& to,
1358                      const std::string& cc,
1359                      const std::string& bcc,
1360                      const std::string& subject,
1361                      const std::string& body) {
1362   std::string javascript =
1363       "var href = 'mailto:" + net::EscapeUrlEncodedData(to, false) +
1364       "?cc=" + net::EscapeUrlEncodedData(cc, false) +
1365       "&bcc=" + net::EscapeUrlEncodedData(bcc, false) +
1366       "&subject=" + net::EscapeUrlEncodedData(subject, false) +
1367       "&body=" + net::EscapeUrlEncodedData(body, false) +
1368       "';var temp = window.open(href, '_blank', " +
1369       "'width=1,height=1');if(temp) temp.close();";
1370   ExecuteScript(javascript);
1371 }
1372
1373 void Instance::Print() {
1374   if (!printing_enabled_ ||
1375       (!engine_->HasPermission(PDFEngine::PERMISSION_PRINT_LOW_QUALITY) &&
1376        !engine_->HasPermission(PDFEngine::PERMISSION_PRINT_HIGH_QUALITY))) {
1377     return;
1378   }
1379
1380   pp::CompletionCallback callback =
1381       print_callback_factory_.NewCallback(&Instance::OnPrint);
1382   pp::Module::Get()->core()->CallOnMainThread(0, callback);
1383 }
1384
1385 void Instance::OnPrint(int32_t) {
1386   pp::PDF::Print(this);
1387 }
1388
1389 void Instance::SaveAs() {
1390   pp::PDF::SaveAs(this);
1391 }
1392
1393 void Instance::SubmitForm(const std::string& url,
1394                           const void* data,
1395                           int length) {
1396   pp::URLRequestInfo request(this);
1397   request.SetURL(url);
1398   request.SetMethod("POST");
1399   request.AppendDataToBody(reinterpret_cast<const char*>(data), length);
1400
1401   pp::CompletionCallback callback =
1402       form_factory_.NewCallback(&Instance::FormDidOpen);
1403   form_loader_ = CreateURLLoaderInternal();
1404   int rv = form_loader_.Open(request, callback);
1405   if (rv != PP_OK_COMPLETIONPENDING)
1406     callback.Run(rv);
1407 }
1408
1409 void Instance::FormDidOpen(int32_t result) {
1410   // TODO: inform the user of success/failure.
1411   if (result != PP_OK) {
1412     NOTREACHED();
1413   }
1414 }
1415
1416 std::string Instance::ShowFileSelectionDialog() {
1417   // Seems like very low priority to implement, since the pdf has no way to get
1418   // the file data anyways.  Javascript doesn't let you do this synchronously.
1419   NOTREACHED();
1420   return std::string();
1421 }
1422
1423 pp::URLLoader Instance::CreateURLLoader() {
1424   if (full_) {
1425     if (!did_call_start_loading_) {
1426       did_call_start_loading_ = true;
1427       pp::PDF::DidStartLoading(this);
1428     }
1429
1430     // Disable save and print until the document is fully loaded, since they
1431     // would generate an incomplete document.  Need to do this each time we
1432     // call DidStartLoading since that resets the content restrictions.
1433     pp::PDF::SetContentRestriction(this, CONTENT_RESTRICTION_SAVE |
1434                                    CONTENT_RESTRICTION_PRINT);
1435   }
1436
1437   return CreateURLLoaderInternal();
1438 }
1439
1440 void Instance::ScheduleCallback(int id, int delay_in_ms) {
1441   pp::CompletionCallback callback =
1442       timer_factory_.NewCallback(&Instance::OnClientTimerFired);
1443   pp::Module::Get()->core()->CallOnMainThread(delay_in_ms, callback, id);
1444 }
1445
1446 void Instance::SearchString(const base::char16* string,
1447                             const base::char16* term,
1448                             bool case_sensitive,
1449                             std::vector<SearchStringResult>* results) {
1450   if (!pp::PDF::IsAvailable()) {
1451     NOTREACHED();
1452     return;
1453   }
1454
1455   PP_PrivateFindResult* pp_results;
1456   int count = 0;
1457   pp::PDF::SearchString(
1458       this,
1459       reinterpret_cast<const unsigned short*>(string),
1460       reinterpret_cast<const unsigned short*>(term),
1461       case_sensitive,
1462       &pp_results,
1463       &count);
1464
1465   results->resize(count);
1466   for (int i = 0; i < count; ++i) {
1467     (*results)[i].start_index = pp_results[i].start_index;
1468     (*results)[i].length = pp_results[i].length;
1469   }
1470
1471   pp::Memory_Dev memory;
1472   memory.MemFree(pp_results);
1473 }
1474
1475 void Instance::DocumentPaintOccurred() {
1476   if (painted_first_page_)
1477     return;
1478
1479   painted_first_page_ = true;
1480   UpdateToolbarPosition(false);
1481   toolbar_->Splash(kToolbarSplashTimeoutMs);
1482
1483   if (engine_->GetNumberOfPages() > 1)
1484     show_page_indicator_ = true;
1485   else
1486     show_page_indicator_ = false;
1487
1488   if (v_scrollbar_.get() && show_page_indicator_) {
1489     page_indicator_.set_current_page(GetPageNumberToDisplay());
1490     page_indicator_.Splash(kToolbarSplashTimeoutMs,
1491                            kPageIndicatorInitialFadeTimeoutMs);
1492   }
1493 }
1494
1495 void Instance::DocumentLoadComplete(int page_count) {
1496   // Clear focus state for OSK.
1497   FormTextFieldFocusChange(false);
1498
1499   // Update progress control.
1500   if (progress_bar_.visible())
1501     progress_bar_.Fade(false, kProgressFadeTimeoutMs);
1502
1503   DCHECK(document_load_state_ == LOAD_STATE_LOADING);
1504   document_load_state_ = LOAD_STATE_COMPLETE;
1505   UserMetricsRecordAction("PDF.LoadSuccess");
1506
1507   if (did_call_start_loading_) {
1508     pp::PDF::DidStopLoading(this);
1509     did_call_start_loading_ = false;
1510   }
1511
1512   if (on_load_callback_.is_string())
1513     ExecuteScript(on_load_callback_);
1514   // Note: If we are in print preview mode on_load_callback_ might call
1515   // ScrollTo{X|Y}() and we don't want to scroll again and override it.
1516   // #page=N is not supported in Print Preview.
1517   if (!IsPrintPreview()) {
1518     int initial_page = GetInitialPage(url_);
1519     if (initial_page >= 0)
1520       ScrollToPage(initial_page);
1521   }
1522
1523   if (!full_)
1524     return;
1525   if (!pp::PDF::IsAvailable())
1526     return;
1527
1528   int content_restrictions =
1529       CONTENT_RESTRICTION_CUT | CONTENT_RESTRICTION_PASTE;
1530   if (!engine_->HasPermission(PDFEngine::PERMISSION_COPY))
1531     content_restrictions |= CONTENT_RESTRICTION_COPY;
1532
1533   if (!engine_->HasPermission(PDFEngine::PERMISSION_PRINT_LOW_QUALITY) &&
1534       !engine_->HasPermission(PDFEngine::PERMISSION_PRINT_HIGH_QUALITY)) {
1535     printing_enabled_ = false;
1536     if (current_tb_info_ == kPDFToolbarButtons) {
1537       // Remove Print button.
1538       CreateToolbar(kPDFNoPrintToolbarButtons,
1539                     arraysize(kPDFNoPrintToolbarButtons));
1540       UpdateToolbarPosition(false);
1541       Invalidate(pp::Rect(plugin_size_));
1542     }
1543   }
1544
1545   pp::PDF::SetContentRestriction(this, content_restrictions);
1546
1547   pp::PDF::HistogramPDFPageCount(this, page_count);
1548 }
1549
1550 void Instance::RotateClockwise() {
1551   engine_->RotateClockwise();
1552 }
1553
1554 void Instance::RotateCounterclockwise() {
1555   engine_->RotateCounterclockwise();
1556 }
1557
1558 void Instance::PreviewDocumentLoadComplete() {
1559   if (preview_document_load_state_ != LOAD_STATE_LOADING ||
1560       preview_pages_info_.empty()) {
1561     return;
1562   }
1563
1564   preview_document_load_state_ = LOAD_STATE_COMPLETE;
1565
1566   int dest_page_index = preview_pages_info_.front().second;
1567   int src_page_index =
1568       ExtractPrintPreviewPageIndex(preview_pages_info_.front().first);
1569   if (src_page_index > 0 &&  dest_page_index > -1 && preview_engine_.get())
1570     engine_->AppendPage(preview_engine_.get(), dest_page_index);
1571
1572   preview_pages_info_.pop();
1573   // |print_preview_page_count_| is not updated yet. Do not load any
1574   // other preview pages till we get this information.
1575   if (print_preview_page_count_ == 0)
1576     return;
1577
1578   if (preview_pages_info_.size())
1579     LoadAvailablePreviewPage();
1580 }
1581
1582 void Instance::DocumentLoadFailed() {
1583   DCHECK(document_load_state_ == LOAD_STATE_LOADING);
1584   UserMetricsRecordAction("PDF.LoadFailure");
1585
1586   // Hide progress control.
1587   progress_bar_.Fade(false, kProgressFadeTimeoutMs);
1588
1589   if (did_call_start_loading_) {
1590     pp::PDF::DidStopLoading(this);
1591     did_call_start_loading_ = false;
1592   }
1593
1594   document_load_state_ = LOAD_STATE_FAILED;
1595   paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
1596 }
1597
1598 void Instance::PreviewDocumentLoadFailed() {
1599   UserMetricsRecordAction("PDF.PreviewDocumentLoadFailure");
1600   if (preview_document_load_state_ != LOAD_STATE_LOADING ||
1601       preview_pages_info_.empty()) {
1602     return;
1603   }
1604
1605   preview_document_load_state_ = LOAD_STATE_FAILED;
1606   preview_pages_info_.pop();
1607
1608   if (preview_pages_info_.size())
1609     LoadAvailablePreviewPage();
1610 }
1611
1612 pp::Instance* Instance::GetPluginInstance() {
1613   return GetInstance();
1614 }
1615
1616 void Instance::DocumentHasUnsupportedFeature(const std::string& feature) {
1617   std::string metric("PDF_Unsupported_");
1618   metric += feature;
1619   if (!unsupported_features_reported_.count(metric)) {
1620     unsupported_features_reported_.insert(metric);
1621     UserMetricsRecordAction(metric);
1622   }
1623
1624   // Since we use an info bar, only do this for full frame plugins..
1625   if (!full_)
1626     return;
1627
1628   if (told_browser_about_unsupported_feature_)
1629     return;
1630   told_browser_about_unsupported_feature_ = true;
1631
1632   pp::PDF::HasUnsupportedFeature(this);
1633 }
1634
1635 void Instance::DocumentLoadProgress(uint32 available, uint32 doc_size) {
1636   double progress = 0.0;
1637   if (doc_size == 0) {
1638     // Document size is unknown. Use heuristics.
1639     // We'll make progress logarithmic from 0 to 100M.
1640     static const double kFactor = log(100000000.0) / 100.0;
1641     if (available > 0) {
1642       progress = log(static_cast<double>(available)) / kFactor;
1643       if (progress > 100.0)
1644         progress = 100.0;
1645     }
1646   } else {
1647     progress = 100.0 * static_cast<double>(available) / doc_size;
1648   }
1649   progress_bar_.SetProgress(progress);
1650 }
1651
1652 void Instance::FormTextFieldFocusChange(bool in_focus) {
1653   if (!text_input_.get())
1654     return;
1655   if (in_focus)
1656     text_input_->SetTextInputType(PP_TEXTINPUT_TYPE_DEV_TEXT);
1657   else
1658     text_input_->SetTextInputType(PP_TEXTINPUT_TYPE_DEV_NONE);
1659 }
1660
1661 // Called by PDFScriptableObject.
1662 bool Instance::HasScriptableMethod(const pp::Var& method, pp::Var* exception) {
1663   std::string method_str = method.AsString();
1664   return (method_str == kJSAccessibility ||
1665           method_str == kJSDocumentLoadComplete ||
1666           method_str == kJSGetHeight ||
1667           method_str == kJSGetHorizontalScrollbarThickness ||
1668           method_str == kJSGetPageLocationNormalized ||
1669           method_str == kJSGetVerticalScrollbarThickness ||
1670           method_str == kJSGetWidth ||
1671           method_str == kJSGetZoomLevel ||
1672           method_str == kJSGoToPage ||
1673           method_str == kJSGrayscale ||
1674           method_str == kJSLoadPreviewPage ||
1675           method_str == kJSOnLoad ||
1676           method_str == kJSOnPluginSizeChanged ||
1677           method_str == kJSOnScroll ||
1678           method_str == kJSPageXOffset ||
1679           method_str == kJSPageYOffset ||
1680           method_str == kJSPrintPreviewPageCount ||
1681           method_str == kJSReload ||
1682           method_str == kJSRemovePrintButton ||
1683           method_str == kJSResetPrintPreviewUrl ||
1684           method_str == kJSSendKeyEvent ||
1685           method_str == kJSSetPageNumbers ||
1686           method_str == kJSSetPageXOffset ||
1687           method_str == kJSSetPageYOffset ||
1688           method_str == kJSSetZoomLevel ||
1689           method_str == kJSZoomFitToHeight ||
1690           method_str == kJSZoomFitToWidth ||
1691           method_str == kJSZoomIn ||
1692           method_str == kJSZoomOut);
1693 }
1694
1695 pp::Var Instance::CallScriptableMethod(const pp::Var& method,
1696                                        const std::vector<pp::Var>& args,
1697                                        pp::Var* exception) {
1698   std::string method_str = method.AsString();
1699   if (method_str == kJSGrayscale) {
1700     if (args.size() == 1 && args[0].is_bool()) {
1701       engine_->SetGrayscale(args[0].AsBool());
1702       // Redraw
1703       paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
1704 #ifdef ENABLE_THUMBNAILS
1705       if (thumbnails_.visible())
1706         thumbnails_.Show(true, true);
1707 #endif
1708       return pp::Var(true);
1709     }
1710     return pp::Var(false);
1711   }
1712   if (method_str == kJSOnLoad) {
1713     if (args.size() == 1 && args[0].is_string()) {
1714       on_load_callback_ = args[0];
1715       return pp::Var(true);
1716     }
1717     return pp::Var(false);
1718   }
1719   if (method_str == kJSOnScroll) {
1720     if (args.size() == 1 && args[0].is_string()) {
1721       on_scroll_callback_ = args[0];
1722       return pp::Var(true);
1723     }
1724     return pp::Var(false);
1725   }
1726   if (method_str == kJSOnPluginSizeChanged) {
1727     if (args.size() == 1 && args[0].is_string()) {
1728       on_plugin_size_changed_callback_ = args[0];
1729       return pp::Var(true);
1730     }
1731     return pp::Var(false);
1732   }
1733   if (method_str == kJSReload) {
1734     document_load_state_ = LOAD_STATE_LOADING;
1735     if (!full_)
1736       LoadUrl(url_);
1737     preview_engine_.reset();
1738     print_preview_page_count_ = 0;
1739     engine_.reset(PDFEngine::Create(this));
1740     engine_->New(url_.c_str());
1741 #ifdef ENABLE_THUMBNAILS
1742     thumbnails_.ResetEngine(engine_.get());
1743 #endif
1744     return pp::Var();
1745   }
1746   if (method_str == kJSResetPrintPreviewUrl) {
1747     if (args.size() == 1 && args[0].is_string()) {
1748       url_ = args[0].AsString();
1749       preview_pages_info_ = std::queue<PreviewPageInfo>();
1750       preview_document_load_state_ = LOAD_STATE_COMPLETE;
1751     }
1752     return pp::Var();
1753   }
1754   if (method_str == kJSZoomFitToHeight) {
1755     SetZoom(ZOOM_FIT_TO_PAGE, 0);
1756     return pp::Var();
1757   }
1758   if (method_str == kJSZoomFitToWidth) {
1759     SetZoom(ZOOM_FIT_TO_WIDTH, 0);
1760     return pp::Var();
1761   }
1762   if (method_str == kJSZoomIn) {
1763     SetZoom(ZOOM_SCALE, CalculateZoom(kZoomInButtonId));
1764     return pp::Var();
1765   }
1766   if (method_str == kJSZoomOut) {
1767     SetZoom(ZOOM_SCALE, CalculateZoom(kZoomOutButtonId));
1768     return pp::Var();
1769   }
1770   if (method_str == kJSSetZoomLevel) {
1771     if (args.size() == 1 && args[0].is_double())
1772       SetZoom(ZOOM_SCALE, args[0].AsDouble());
1773     return pp::Var();
1774   }
1775   if (method_str == kJSGetZoomLevel) {
1776     return pp::Var(zoom_);
1777   }
1778   if (method_str == kJSGetHeight) {
1779     return pp::Var(plugin_size_.height());
1780   }
1781   if (method_str == kJSGetWidth) {
1782     return pp::Var(plugin_size_.width());
1783   }
1784   if (method_str == kJSGetHorizontalScrollbarThickness) {
1785     return pp::Var(
1786           h_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1787   }
1788   if (method_str == kJSGetVerticalScrollbarThickness) {
1789     return pp::Var(
1790           v_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1791   }
1792   if (method_str == kJSDocumentLoadComplete) {
1793     return pp::Var((document_load_state_ != LOAD_STATE_LOADING));
1794   }
1795   if (method_str == kJSPageYOffset) {
1796     return pp::Var(static_cast<int32_t>(
1797         v_scrollbar_.get() ? v_scrollbar_->GetValue() : 0));
1798   }
1799   if (method_str == kJSSetPageYOffset) {
1800     if (args.size() == 1 && args[0].is_number() && v_scrollbar_.get())
1801       ScrollToY(GetScaled(args[0].AsInt()));
1802     return pp::Var();
1803   }
1804   if (method_str == kJSPageXOffset) {
1805     return pp::Var(static_cast<int32_t>(
1806         h_scrollbar_.get() ? h_scrollbar_->GetValue() : 0));
1807   }
1808   if (method_str == kJSSetPageXOffset) {
1809     if (args.size() == 1 && args[0].is_number() && h_scrollbar_.get())
1810       ScrollToX(GetScaled(args[0].AsInt()));
1811     return pp::Var();
1812   }
1813   if (method_str == kJSRemovePrintButton) {
1814     CreateToolbar(kPrintPreviewToolbarButtons,
1815                   arraysize(kPrintPreviewToolbarButtons));
1816     UpdateToolbarPosition(false);
1817     Invalidate(pp::Rect(plugin_size_));
1818     return pp::Var();
1819   }
1820   if (method_str == kJSGoToPage) {
1821     if (args.size() == 1 && args[0].is_string()) {
1822       ScrollToPage(atoi(args[0].AsString().c_str()));
1823     }
1824     return pp::Var();
1825   }
1826   if (method_str == kJSAccessibility) {
1827     if (args.size() == 0) {
1828       base::DictionaryValue node;
1829       node.SetInteger(kAccessibleNumberOfPages, engine_->GetNumberOfPages());
1830       node.SetBoolean(kAccessibleLoaded,
1831                       document_load_state_ != LOAD_STATE_LOADING);
1832       bool has_permissions =
1833           engine_->HasPermission(PDFEngine::PERMISSION_COPY) ||
1834           engine_->HasPermission(PDFEngine::PERMISSION_COPY_ACCESSIBLE);
1835       node.SetBoolean(kAccessibleCopyable, has_permissions);
1836       std::string json;
1837       base::JSONWriter::Write(&node, &json);
1838       return pp::Var(json);
1839     } else if (args[0].is_number()) {
1840       return pp::Var(engine_->GetPageAsJSON(args[0].AsInt()));
1841     }
1842   }
1843   if (method_str == kJSPrintPreviewPageCount) {
1844     if (args.size() == 1 && args[0].is_number())
1845       SetPrintPreviewMode(args[0].AsInt());
1846     return pp::Var();
1847   }
1848   if (method_str == kJSLoadPreviewPage) {
1849     if (args.size() == 2 && args[0].is_string() && args[1].is_number())
1850       ProcessPreviewPageInfo(args[0].AsString(), args[1].AsInt());
1851     return pp::Var();
1852   }
1853   if (method_str == kJSGetPageLocationNormalized) {
1854     const size_t kMaxLength = 30;
1855     char location_info[kMaxLength];
1856     int page_idx = engine_->GetMostVisiblePage();
1857     if (page_idx < 0)
1858       return pp::Var(std::string());
1859     pp::Rect rect = engine_->GetPageContentsRect(page_idx);
1860     int v_scrollbar_reserved_thickness =
1861         v_scrollbar_.get() ? GetScaled(GetScrollbarReservedThickness()) : 0;
1862
1863     rect.set_x(rect.x() + ((plugin_size_.width() -
1864         v_scrollbar_reserved_thickness - available_area_.width()) / 2));
1865     base::snprintf(location_info,
1866                    kMaxLength,
1867                    "%0.4f;%0.4f;%0.4f;%0.4f;",
1868                    rect.x() / static_cast<float>(plugin_size_.width()),
1869                    rect.y() / static_cast<float>(plugin_size_.height()),
1870                    rect.width() / static_cast<float>(plugin_size_.width()),
1871                    rect.height()/ static_cast<float>(plugin_size_.height()));
1872     return pp::Var(std::string(location_info));
1873   }
1874   if (method_str == kJSSetPageNumbers) {
1875     if (args.size() != 1 || !args[0].is_string())
1876       return pp::Var();
1877     const int num_pages_signed = engine_->GetNumberOfPages();
1878     if (num_pages_signed <= 0)
1879       return pp::Var();
1880     scoped_ptr<base::ListValue> page_ranges(static_cast<base::ListValue*>(
1881         base::JSONReader::Read(args[0].AsString(), false)));
1882     const size_t num_pages = static_cast<size_t>(num_pages_signed);
1883     if (!page_ranges.get() || page_ranges->GetSize() != num_pages)
1884       return pp::Var();
1885
1886     std::vector<int> print_preview_page_numbers;
1887     for (size_t index = 0; index < num_pages; ++index) {
1888       int page_number = 0;  // |page_number| is 1-based.
1889       if (!page_ranges->GetInteger(index, &page_number) || page_number < 1)
1890         return pp::Var();
1891       print_preview_page_numbers.push_back(page_number);
1892     }
1893     print_preview_page_numbers_ = print_preview_page_numbers;
1894     page_indicator_.set_current_page(GetPageNumberToDisplay());
1895     return pp::Var();
1896   }
1897   // This is here to work around https://bugs.webkit.org/show_bug.cgi?id=16735.
1898   // In JS, creating a synthetic keyboard event and dispatching it always
1899   // result in a keycode of 0.
1900   if (method_str == kJSSendKeyEvent) {
1901     if (args.size() == 1 && args[0].is_number()) {
1902       pp::KeyboardInputEvent event(
1903           this,                        // instance
1904           PP_INPUTEVENT_TYPE_KEYDOWN,  // HandleInputEvent only care about this.
1905           0,                           // timestamp, not used for kbd events.
1906           0,                           // no modifiers.
1907           args[0].AsInt(),             // keycode.
1908           pp::Var());                  // no char text needed.
1909       HandleInputEvent(event);
1910     }
1911   }
1912   return pp::Var();
1913 }
1914
1915 void Instance::OnGeometryChanged(double old_zoom, float old_device_scale) {
1916   bool force_no_horizontal_scrollbar = false;
1917   int scrollbar_thickness = GetScrollbarThickness();
1918
1919   if (old_device_scale != device_scale_) {
1920     // Change in device scale forces us to recreate resources
1921     ConfigureNumberImageGenerator();
1922
1923     CreateToolbar(current_tb_info_, current_tb_info_size_);
1924     // Load autoscroll anchor image.
1925     autoscroll_anchor_ =
1926         CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAN_SCROLL_ICON);
1927
1928     ConfigurePageIndicator();
1929     ConfigureProgressBar();
1930
1931     pp::Point scroll_position = engine_->GetScrollPosition();
1932     ScalePoint(device_scale_ / old_device_scale, &scroll_position);
1933     engine_->SetScrollPosition(scroll_position);
1934   }
1935
1936   UpdateZoomScale();
1937   if (zoom_ != old_zoom || device_scale_ != old_device_scale)
1938     engine_->ZoomUpdated(zoom_ * device_scale_);
1939   if (zoom_ != old_zoom)
1940     ZoomChanged(zoom_);
1941
1942   available_area_ = pp::Rect(plugin_size_);
1943   if (GetDocumentPixelHeight() > plugin_size_.height()) {
1944     CreateVerticalScrollbar();
1945   } else {
1946     DestroyVerticalScrollbar();
1947   }
1948
1949   int v_scrollbar_reserved_thickness =
1950       v_scrollbar_.get() ? GetScaled(GetScrollbarReservedThickness()) : 0;
1951
1952   if (!force_no_horizontal_scrollbar &&
1953       GetDocumentPixelWidth() >
1954       (plugin_size_.width() - v_scrollbar_reserved_thickness)) {
1955     CreateHorizontalScrollbar();
1956
1957     // Adding the horizontal scrollbar now might cause us to need vertical
1958     // scrollbars.
1959     if (GetDocumentPixelHeight() >
1960         plugin_size_.height() - GetScaled(GetScrollbarReservedThickness())) {
1961       CreateVerticalScrollbar();
1962     }
1963
1964   } else {
1965     DestroyHorizontalScrollbar();
1966   }
1967
1968 #ifdef ENABLE_THUMBNAILS
1969   int thumbnails_pos = 0, thumbnails_total = 0;
1970 #endif
1971   if (v_scrollbar_.get()) {
1972     v_scrollbar_->SetScale(device_scale_);
1973     available_area_.set_width(
1974       std::max(0, plugin_size_.width() - v_scrollbar_reserved_thickness));
1975
1976 #ifdef ENABLE_THUMBNAILS
1977     int height = plugin_size_.height();
1978 #endif
1979     int height_dip = plugin_dip_size_.height();
1980
1981 #if defined(OS_MACOSX)
1982     // Before Lion, Mac always had the resize at the bottom. After that, it
1983     // never did.
1984     if ((base::mac::IsOSSnowLeopard() && full_) ||
1985         (base::mac::IsOSLionOrLater() && h_scrollbar_.get())) {
1986 #else
1987     if (h_scrollbar_.get()) {
1988 #endif  // defined(OS_MACOSX)
1989 #ifdef ENABLE_THUMBNAILS
1990       height -= GetScaled(GetScrollbarThickness());
1991 #endif
1992       height_dip -= GetScrollbarThickness();
1993     }
1994 #ifdef ENABLE_THUMBNAILS
1995     int32 doc_height = GetDocumentPixelHeight();
1996 #endif
1997     int32 doc_height_dip =
1998         static_cast<int32>(GetDocumentPixelHeight() / device_scale_);
1999 #if defined(OS_MACOSX)
2000     // On the Mac we always allow room for the resize button (whose width is
2001     // the same as that of the scrollbar) in full mode. However, if there is no
2002     // no horizontal scrollbar, the end of the scrollbar will scroll past the
2003     // end of the document. This is because the scrollbar assumes that its own
2004     // height (in the case of a vscroll bar) is the same as the height of the
2005     // viewport. Since the viewport is actually larger, we compensate by
2006     // adjusting the document height. Similar logic applies below for the
2007     // horizontal scrollbar.
2008     // For example, if the document size is 1000, and the viewport size is 200,
2009     // then the scrollbar position at the end will be 800. In this case the
2010     // viewport is actally 215 (assuming 15 as the scrollbar width) but the
2011     // scrollbar thinks it is 200. We want the scrollbar position at the end to
2012     // be 785. Making the document size 985 achieves this.
2013     if (full_ && !h_scrollbar_.get()) {
2014 #ifdef ENABLE_THUMBNAILS
2015       doc_height -= GetScaled(GetScrollbarThickness());
2016 #endif
2017       doc_height_dip -= GetScrollbarThickness();
2018     }
2019 #endif  // defined(OS_MACOSX)
2020
2021     int32 position;
2022     position = v_scrollbar_->GetValue();
2023     position = static_cast<int>(position * zoom_ / old_zoom);
2024     valid_v_range_ = doc_height_dip - height_dip;
2025     if (position > valid_v_range_)
2026       position = valid_v_range_;
2027
2028     v_scrollbar_->SetValue(position);
2029
2030     PP_Rect loc;
2031     loc.point.x = static_cast<int>(available_area_.right() / device_scale_);
2032     if (IsOverlayScrollbar())
2033       loc.point.x -= scrollbar_thickness;
2034     loc.point.y = 0;
2035     loc.size.width = scrollbar_thickness;
2036     loc.size.height = height_dip;
2037     v_scrollbar_->SetLocation(loc);
2038     v_scrollbar_->SetDocumentSize(doc_height_dip);
2039
2040 #ifdef ENABLE_THUMBNAILS
2041     thumbnails_pos = position;
2042     thumbnails_total = doc_height - height;
2043 #endif
2044   }
2045
2046   if (h_scrollbar_.get()) {
2047     h_scrollbar_->SetScale(device_scale_);
2048     available_area_.set_height(
2049         std::max(0, plugin_size_.height() -
2050                     GetScaled(GetScrollbarReservedThickness())));
2051
2052     int width_dip = plugin_dip_size_.width();
2053
2054     // See note above.
2055 #if defined(OS_MACOSX)
2056     if ((base::mac::IsOSSnowLeopard() && full_) ||
2057         (base::mac::IsOSLionOrLater() && v_scrollbar_.get())) {
2058 #else
2059     if (v_scrollbar_.get()) {
2060 #endif
2061       width_dip -= GetScrollbarThickness();
2062     }
2063     int32 doc_width_dip =
2064         static_cast<int32>(GetDocumentPixelWidth() / device_scale_);
2065 #if defined(OS_MACOSX)
2066     // See comment in the above if (v_scrollbar_.get()) block.
2067     if (full_ && !v_scrollbar_.get())
2068       doc_width_dip -= GetScrollbarThickness();
2069 #endif  // defined(OS_MACOSX)
2070
2071     int32 position;
2072     position = h_scrollbar_->GetValue();
2073     position = static_cast<int>(position * zoom_ / old_zoom);
2074     position = std::min(position, doc_width_dip - width_dip);
2075
2076     h_scrollbar_->SetValue(position);
2077
2078     PP_Rect loc;
2079     loc.point.x = 0;
2080     loc.point.y = static_cast<int>(available_area_.bottom() / device_scale_);
2081     if (IsOverlayScrollbar())
2082       loc.point.y -= scrollbar_thickness;
2083     loc.size.width = width_dip;
2084     loc.size.height = scrollbar_thickness;
2085     h_scrollbar_->SetLocation(loc);
2086     h_scrollbar_->SetDocumentSize(doc_width_dip);
2087   }
2088
2089   int doc_width = GetDocumentPixelWidth();
2090   if (doc_width < available_area_.width()) {
2091     available_area_.Offset((available_area_.width() - doc_width) / 2, 0);
2092     available_area_.set_width(doc_width);
2093   }
2094   int doc_height = GetDocumentPixelHeight();
2095   if (doc_height < available_area_.height()) {
2096     available_area_.set_height(doc_height);
2097   }
2098
2099   // We'll invalidate the entire plugin anyways.
2100   UpdateToolbarPosition(false);
2101   UpdateProgressBarPosition(false);
2102   UpdatePageIndicatorPosition(false);
2103
2104 #ifdef ENABLE_THUMBNAILS
2105   // Update thumbnail control position.
2106   thumbnails_.SetPosition(thumbnails_pos, thumbnails_total, false);
2107   pp::Rect thumbnails_rc(plugin_size_.width() - GetScaled(kThumbnailsWidth), 0,
2108     GetScaled(kThumbnailsWidth), plugin_size_.height());
2109   if (v_scrollbar_.get())
2110     thumbnails_rc.Offset(-v_scrollbar_reserved_thickness, 0);
2111   if (h_scrollbar_.get())
2112     thumbnails_rc.Inset(0, 0, 0, v_scrollbar_reserved_thickness);
2113   thumbnails_.SetRect(thumbnails_rc, false);
2114 #endif
2115
2116   CalculateBackgroundParts();
2117   engine_->PageOffsetUpdated(available_area_.point());
2118   engine_->PluginSizeUpdated(available_area_.size());
2119
2120   if (!document_size_.GetArea())
2121     return;
2122   paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
2123
2124   if (on_plugin_size_changed_callback_.is_string())
2125     ExecuteScript(on_plugin_size_changed_callback_);
2126 }
2127
2128 void Instance::CreateHorizontalScrollbar() {
2129   if (h_scrollbar_.get())
2130     return;
2131
2132   h_scrollbar_.reset(new pp::Scrollbar_Dev(this, false));
2133 }
2134
2135 void Instance::CreateVerticalScrollbar() {
2136   if (v_scrollbar_.get())
2137     return;
2138
2139   v_scrollbar_.reset(new pp::Scrollbar_Dev(this, true));
2140 }
2141
2142 void Instance::DestroyHorizontalScrollbar() {
2143   if (!h_scrollbar_.get())
2144     return;
2145   if (h_scrollbar_->GetValue())
2146     engine_->ScrolledToXPosition(0);
2147   h_scrollbar_.reset();
2148 }
2149
2150 void Instance::DestroyVerticalScrollbar() {
2151   if (!v_scrollbar_.get())
2152     return;
2153   if (v_scrollbar_->GetValue())
2154     engine_->ScrolledToYPosition(0);
2155   v_scrollbar_.reset();
2156   page_indicator_.Show(false, true);
2157 }
2158
2159 int Instance::GetScrollbarThickness() {
2160   if (scrollbar_thickness_ == -1) {
2161     pp::Scrollbar_Dev temp_scrollbar(this, false);
2162     scrollbar_thickness_ = temp_scrollbar.GetThickness();
2163     scrollbar_reserved_thickness_ =
2164       temp_scrollbar.IsOverlay() ? 0 : scrollbar_thickness_;
2165   }
2166
2167   return scrollbar_thickness_;
2168 }
2169
2170 int Instance::GetScrollbarReservedThickness() {
2171   GetScrollbarThickness();
2172   return scrollbar_reserved_thickness_;
2173 }
2174
2175 bool Instance::IsOverlayScrollbar() {
2176   return GetScrollbarReservedThickness() == 0;
2177 }
2178
2179 void Instance::CreateToolbar(const ToolbarButtonInfo* tb_info, size_t size) {
2180   toolbar_.reset(new FadingControls());
2181
2182   DCHECK(tb_info);
2183   DCHECK(size >= 0);
2184
2185   // Remember the current toolbar information in case we need to recreate the
2186   // images later.
2187   current_tb_info_ = tb_info;
2188   current_tb_info_size_ = size;
2189
2190   int max_height = 0;
2191   pp::Point origin(kToolbarFadingOffsetLeft, kToolbarFadingOffsetTop);
2192   ScalePoint(device_scale_, &origin);
2193
2194   std::list<Button*> buttons;
2195   for (size_t i = 0; i < size; i++) {
2196     Button* btn = new Button;
2197     pp::ImageData normal_face =
2198         CreateResourceImage(tb_info[i].normal);
2199     btn->CreateButton(tb_info[i].id,
2200                       origin,
2201                       true,
2202                       toolbar_.get(),
2203                       tb_info[i].style,
2204                       normal_face,
2205                       CreateResourceImage(tb_info[i].highlighted),
2206                       CreateResourceImage(tb_info[i].pressed));
2207     buttons.push_back(btn);
2208
2209     origin += pp::Point(normal_face.size().width(), 0);
2210     max_height = std::max(max_height, normal_face.size().height());
2211   }
2212
2213   pp::Rect rc_toolbar(0, 0,
2214       origin.x() + GetToolbarRightOffset(),
2215       origin.y() + max_height + GetToolbarBottomOffset());
2216   toolbar_->CreateFadingControls(
2217       kToolbarId, rc_toolbar, false, this, kTransparentAlpha);
2218
2219   std::list<Button*>::iterator iter;
2220   for (iter = buttons.begin(); iter != buttons.end(); ++iter) {
2221     toolbar_->AddControl(*iter);
2222   }
2223 }
2224
2225 int Instance::GetToolbarRightOffset() {
2226   int scrollbar_thickness = GetScrollbarThickness();
2227   return GetScaled(kToolbarFadingOffsetRight) + 2 * scrollbar_thickness;
2228 }
2229
2230 int Instance::GetToolbarBottomOffset() {
2231   int scrollbar_thickness = GetScrollbarThickness();
2232   return GetScaled(kToolbarFadingOffsetBottom) + scrollbar_thickness;
2233 }
2234
2235 std::vector<pp::ImageData> Instance::GetThumbnailResources() {
2236   std::vector<pp::ImageData> num_images(10);
2237   num_images[0] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_0);
2238   num_images[1] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_1);
2239   num_images[2] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_2);
2240   num_images[3] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_3);
2241   num_images[4] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_4);
2242   num_images[5] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_5);
2243   num_images[6] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_6);
2244   num_images[7] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_7);
2245   num_images[8] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_8);
2246   num_images[9] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_9);
2247   return num_images;
2248 }
2249
2250 std::vector<pp::ImageData> Instance::GetProgressBarResources(
2251     pp::ImageData* background) {
2252   std::vector<pp::ImageData> result(9);
2253   result[0] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_0);
2254   result[1] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_1);
2255   result[2] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_2);
2256   result[3] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_3);
2257   result[4] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_4);
2258   result[5] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_5);
2259   result[6] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_6);
2260   result[7] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_7);
2261   result[8] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_8);
2262   *background = CreateResourceImage(
2263       PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_BACKGROUND);
2264   return result;
2265 }
2266
2267 void Instance::CreatePageIndicator(bool always_visible) {
2268   page_indicator_.CreatePageIndicator(kPageIndicatorId, false, this,
2269       number_image_generator(), always_visible);
2270   ConfigurePageIndicator();
2271 }
2272
2273 void Instance::ConfigurePageIndicator() {
2274   pp::ImageData background =
2275       CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAGE_INDICATOR_BACKGROUND);
2276   page_indicator_.Configure(pp::Point(), background);
2277 }
2278
2279 void Instance::CreateProgressBar() {
2280   pp::ImageData background;
2281   std::vector<pp::ImageData> images = GetProgressBarResources(&background);
2282   std::string text = GetLocalizedString(PP_RESOURCESTRING_PDFPROGRESSLOADING);
2283   progress_bar_.CreateProgressControl(kProgressBarId, false, this, 0.0,
2284       device_scale_, images, background, text);
2285 }
2286
2287 void Instance::ConfigureProgressBar() {
2288   pp::ImageData background;
2289   std::vector<pp::ImageData> images = GetProgressBarResources(&background);
2290   progress_bar_.Reconfigure(background, images, device_scale_);
2291 }
2292
2293 void Instance::CreateThumbnails() {
2294   thumbnails_.CreateThumbnailControl(
2295       kThumbnailsId, pp::Rect(), false, this, engine_.get(),
2296       number_image_generator());
2297 }
2298
2299 void Instance::LoadUrl(const std::string& url) {
2300   LoadUrlInternal(url, &embed_loader_, &Instance::DidOpen);
2301 }
2302
2303 void Instance::LoadPreviewUrl(const std::string& url) {
2304   LoadUrlInternal(url, &embed_preview_loader_, &Instance::DidOpenPreview);
2305 }
2306
2307 void Instance::LoadUrlInternal(const std::string& url, pp::URLLoader* loader,
2308                                void (Instance::* method)(int32_t)) {
2309   pp::URLRequestInfo request(this);
2310   request.SetURL(url);
2311   request.SetMethod("GET");
2312
2313   *loader = CreateURLLoaderInternal();
2314   pp::CompletionCallback callback = loader_factory_.NewCallback(method);
2315   int rv = loader->Open(request, callback);
2316   if (rv != PP_OK_COMPLETIONPENDING)
2317     callback.Run(rv);
2318 }
2319
2320 pp::URLLoader Instance::CreateURLLoaderInternal() {
2321   pp::URLLoader loader(this);
2322
2323   const PPB_URLLoaderTrusted* trusted_interface =
2324       reinterpret_cast<const PPB_URLLoaderTrusted*>(
2325           pp::Module::Get()->GetBrowserInterface(
2326               PPB_URLLOADERTRUSTED_INTERFACE));
2327   if (trusted_interface)
2328     trusted_interface->GrantUniversalAccess(loader.pp_resource());
2329   return loader;
2330 }
2331
2332 int Instance::GetInitialPage(const std::string& url) {
2333   size_t found_idx = url.find('#');
2334   if (found_idx == std::string::npos)
2335     return -1;
2336
2337   const std::string& ref = url.substr(found_idx + 1);
2338   std::vector<std::string> fragments;
2339   Tokenize(ref, kDelimiters, &fragments);
2340
2341   // Page number to return, zero-based.
2342   int page = -1;
2343
2344   // Handle the case of http://foo.com/bar#NAMEDDEST. This is not explicitly
2345   // mentioned except by example in the Adobe "PDF Open Parameters" document.
2346   if ((fragments.size() == 1) && (fragments[0].find('=') == std::string::npos))
2347     return engine_->GetNamedDestinationPage(fragments[0]);
2348
2349   for (size_t i = 0; i < fragments.size(); ++i) {
2350     std::vector<std::string> key_value;
2351     base::SplitString(fragments[i], '=', &key_value);
2352     if (key_value.size() != 2)
2353       continue;
2354     const std::string& key = key_value[0];
2355     const std::string& value = key_value[1];
2356
2357     if (base::strcasecmp(kPage, key.c_str()) == 0) {
2358       // |page_value| is 1-based.
2359       int page_value = -1;
2360       if (base::StringToInt(value, &page_value) && page_value > 0)
2361         page = page_value - 1;
2362       continue;
2363     }
2364     if (base::strcasecmp(kNamedDest, key.c_str()) == 0) {
2365       // |page_value| is 0-based.
2366       int page_value = engine_->GetNamedDestinationPage(value);
2367       if (page_value >= 0)
2368         page = page_value;
2369       continue;
2370     }
2371   }
2372   return page;
2373 }
2374
2375 void Instance::UpdateToolbarPosition(bool invalidate) {
2376   pp::Rect ctrl_rc = toolbar_->GetControlsRect();
2377   int min_toolbar_width = ctrl_rc.width() + GetToolbarRightOffset() +
2378       GetScaled(kToolbarFadingOffsetLeft);
2379   int min_toolbar_height = ctrl_rc.width() + GetToolbarBottomOffset() +
2380       GetScaled(kToolbarFadingOffsetBottom);
2381
2382   // Update toolbar position
2383   if (plugin_size_.width() < min_toolbar_width ||
2384       plugin_size_.height() < min_toolbar_height) {
2385     // Disable toolbar if it does not fit on the screen.
2386     toolbar_->Show(false, invalidate);
2387   } else {
2388     pp::Point offset(
2389         plugin_size_.width() - GetToolbarRightOffset() - ctrl_rc.right(),
2390         plugin_size_.height() - GetToolbarBottomOffset() - ctrl_rc.bottom());
2391     toolbar_->MoveBy(offset, invalidate);
2392
2393     int toolbar_width = std::max(plugin_size_.width() / 2, min_toolbar_width);
2394     toolbar_->ExpandLeft(toolbar_width - toolbar_->rect().width());
2395     toolbar_->Show(painted_first_page_, invalidate);
2396   }
2397 }
2398
2399 void Instance::UpdateProgressBarPosition(bool invalidate) {
2400   // TODO(gene): verify we don't overlap with toolbar.
2401   int scrollbar_thickness = GetScrollbarThickness();
2402   pp::Point progress_origin(
2403       scrollbar_thickness + GetScaled(kProgressOffsetLeft),
2404       plugin_size_.height() - progress_bar_.rect().height() -
2405           scrollbar_thickness - GetScaled(kProgressOffsetBottom));
2406   progress_bar_.MoveTo(progress_origin, invalidate);
2407 }
2408
2409 void Instance::UpdatePageIndicatorPosition(bool invalidate) {
2410   int32 doc_height = static_cast<int>(document_size_.height() * zoom_);
2411   pp::Point origin(
2412       plugin_size_.width() - page_indicator_.rect().width() -
2413           GetScaled(GetScrollbarReservedThickness()),
2414       page_indicator_.GetYPosition(engine_->GetVerticalScrollbarYPosition(),
2415                                    doc_height, plugin_size_.height()));
2416   page_indicator_.MoveTo(origin, invalidate);
2417 }
2418
2419 void Instance::SetZoom(ZoomMode zoom_mode, double scale) {
2420   double old_zoom = zoom_;
2421
2422   zoom_mode_ = zoom_mode;
2423   if (zoom_mode_ == ZOOM_SCALE)
2424     zoom_ = scale;
2425   UpdateZoomScale();
2426
2427   engine_->ZoomUpdated(zoom_ * device_scale_);
2428   OnGeometryChanged(old_zoom, device_scale_);
2429
2430   // If fit-to-height, snap to the beginning of the most visible page.
2431   if (zoom_mode_ == ZOOM_FIT_TO_PAGE) {
2432     ScrollToPage(engine_->GetMostVisiblePage());
2433   }
2434
2435   // Update sticky buttons to the current zoom style.
2436   Button* ftp_btn = static_cast<Button*>(
2437       toolbar_->GetControl(kFitToPageButtonId));
2438   Button* ftw_btn = static_cast<Button*>(
2439       toolbar_->GetControl(kFitToWidthButtonId));
2440   switch (zoom_mode_) {
2441     case ZOOM_FIT_TO_PAGE:
2442       ftp_btn->SetPressedState(true);
2443       ftw_btn->SetPressedState(false);
2444       break;
2445     case ZOOM_FIT_TO_WIDTH:
2446       ftw_btn->SetPressedState(true);
2447       ftp_btn->SetPressedState(false);
2448       break;
2449     default:
2450       ftw_btn->SetPressedState(false);
2451       ftp_btn->SetPressedState(false);
2452   }
2453 }
2454
2455 void Instance::UpdateZoomScale() {
2456   switch (zoom_mode_) {
2457     case ZOOM_SCALE:
2458       break;  // Keep current scale.
2459     case ZOOM_FIT_TO_PAGE: {
2460       int page_num = engine_->GetFirstVisiblePage();
2461       if (page_num == -1)
2462         break;
2463       pp::Rect rc = engine_->GetPageRect(page_num);
2464       if (!rc.height())
2465         break;
2466       // Calculate fit to width zoom level.
2467       double ftw_zoom = static_cast<double>(plugin_dip_size_.width() -
2468           GetScrollbarReservedThickness()) / document_size_.width();
2469       // Calculate fit to height zoom level. If document will not fit
2470       // horizontally, adjust zoom level to allow space for horizontal
2471       // scrollbar.
2472       double fth_zoom =
2473           static_cast<double>(plugin_dip_size_.height()) / rc.height();
2474       if (fth_zoom * document_size_.width() >
2475           plugin_dip_size_.width() - GetScrollbarReservedThickness())
2476         fth_zoom = static_cast<double>(plugin_dip_size_.height()
2477             - GetScrollbarReservedThickness()) / rc.height();
2478       zoom_ = std::min(ftw_zoom, fth_zoom);
2479     } break;
2480     case ZOOM_FIT_TO_WIDTH:
2481     case ZOOM_AUTO:
2482       if (!document_size_.width())
2483         break;
2484       zoom_ = static_cast<double>(plugin_dip_size_.width() -
2485           GetScrollbarReservedThickness()) / document_size_.width();
2486       if (zoom_mode_ == ZOOM_AUTO && zoom_ > 1.0)
2487         zoom_ = 1.0;
2488       break;
2489   }
2490   zoom_ = ClipToRange(zoom_, kMinZoom, kMaxZoom);
2491 }
2492
2493 double Instance::CalculateZoom(uint32 control_id) const {
2494   if (control_id == kZoomInButtonId) {
2495     for (size_t i = 0; i < chrome_page_zoom::kPresetZoomFactorsSize; ++i) {
2496       double current_zoom = chrome_page_zoom::kPresetZoomFactors[i];
2497       if (current_zoom - content::kEpsilon > zoom_)
2498         return current_zoom;
2499     }
2500   } else {
2501     for (size_t i = chrome_page_zoom::kPresetZoomFactorsSize; i > 0; --i) {
2502       double current_zoom = chrome_page_zoom::kPresetZoomFactors[i - 1];
2503       if (current_zoom + content::kEpsilon < zoom_)
2504         return current_zoom;
2505     }
2506   }
2507   return zoom_;
2508 }
2509
2510 pp::ImageData Instance::CreateResourceImage(PP_ResourceImage image_id) {
2511   if (hidpi_enabled_)
2512     return pp::PDF::GetResourceImageForScale(this, image_id, device_scale_);
2513
2514   return pp::PDF::GetResourceImage(this, image_id);
2515 }
2516
2517 std::string Instance::GetLocalizedString(PP_ResourceString id) {
2518   pp::Var rv(pp::PDF::GetLocalizedString(this, id));
2519   if (!rv.is_string())
2520     return std::string();
2521
2522   return rv.AsString();
2523 }
2524
2525 void Instance::DrawText(const pp::Point& top_center, PP_ResourceString id) {
2526   std::string str(GetLocalizedString(id));
2527
2528   pp::FontDescription_Dev description;
2529   description.set_family(PP_FONTFAMILY_SANSSERIF);
2530   description.set_size(kMessageTextSize * device_scale_);
2531   pp::Font_Dev font(this, description);
2532   int length = font.MeasureSimpleText(str);
2533   pp::Point point(top_center);
2534   point.set_x(point.x() - length / 2);
2535   DCHECK(!image_data_.is_null());
2536   font.DrawSimpleText(&image_data_, str, point, kMessageTextColor);
2537 }
2538
2539 void Instance::SetPrintPreviewMode(int page_count) {
2540   if (!IsPrintPreview() || page_count <= 0) {
2541     print_preview_page_count_ = 0;
2542     return;
2543   }
2544
2545   print_preview_page_count_ = page_count;
2546   ScrollToPage(0);
2547   engine_->AppendBlankPages(print_preview_page_count_);
2548   if (preview_pages_info_.size() > 0)
2549     LoadAvailablePreviewPage();
2550 }
2551
2552 bool Instance::IsPrintPreview() {
2553   return IsPrintPreviewUrl(url_);
2554 }
2555
2556 int Instance::GetPageNumberToDisplay() {
2557   int page = engine_->GetMostVisiblePage();
2558   if (IsPrintPreview() && !print_preview_page_numbers_.empty()) {
2559     page = ClipToRange<int>(page, 0, print_preview_page_numbers_.size() - 1);
2560     return print_preview_page_numbers_[page];
2561   }
2562   return page + 1;
2563 }
2564
2565 void Instance::ProcessPreviewPageInfo(const std::string& url,
2566                                       int dst_page_index) {
2567   if (!IsPrintPreview() || print_preview_page_count_ < 0)
2568     return;
2569
2570   int src_page_index = ExtractPrintPreviewPageIndex(url);
2571   if (src_page_index < 1)
2572     return;
2573
2574   preview_pages_info_.push(std::make_pair(url, dst_page_index));
2575   LoadAvailablePreviewPage();
2576 }
2577
2578 void Instance::LoadAvailablePreviewPage() {
2579   if (preview_pages_info_.size() <= 0)
2580     return;
2581
2582   std::string url = preview_pages_info_.front().first;
2583   int dst_page_index = preview_pages_info_.front().second;
2584   int src_page_index = ExtractPrintPreviewPageIndex(url);
2585   if (src_page_index < 1 ||
2586       dst_page_index >= print_preview_page_count_ ||
2587       preview_document_load_state_ == LOAD_STATE_LOADING) {
2588     return;
2589   }
2590
2591   preview_document_load_state_ = LOAD_STATE_LOADING;
2592   LoadPreviewUrl(url);
2593 }
2594
2595 void Instance::EnableAutoscroll(const pp::Point& origin) {
2596   if (is_autoscroll_)
2597     return;
2598
2599   pp::Size client_size = plugin_size_;
2600   if (v_scrollbar_.get())
2601     client_size.Enlarge(-GetScrollbarThickness(), 0);
2602   if (h_scrollbar_.get())
2603     client_size.Enlarge(0, -GetScrollbarThickness());
2604
2605   // Do not allow autoscroll if client area is too small.
2606   if (autoscroll_anchor_.size().width() > client_size.width() ||
2607       autoscroll_anchor_.size().height() > client_size.height())
2608     return;
2609
2610   autoscroll_rect_ = pp::Rect(
2611       pp::Point(origin.x() - autoscroll_anchor_.size().width() / 2,
2612                 origin.y() - autoscroll_anchor_.size().height() / 2),
2613       autoscroll_anchor_.size());
2614
2615   // Make sure autoscroll anchor is in the client area.
2616   if (autoscroll_rect_.right() > client_size.width()) {
2617     autoscroll_rect_.set_x(
2618         client_size.width() - autoscroll_anchor_.size().width());
2619   }
2620   if (autoscroll_rect_.bottom() > client_size.height()) {
2621     autoscroll_rect_.set_y(
2622         client_size.height() - autoscroll_anchor_.size().height());
2623   }
2624
2625   if (autoscroll_rect_.x() < 0)
2626     autoscroll_rect_.set_x(0);
2627   if (autoscroll_rect_.y() < 0)
2628     autoscroll_rect_.set_y(0);
2629
2630   is_autoscroll_ = true;
2631   Invalidate(kAutoScrollId, autoscroll_rect_);
2632
2633   ScheduleTimer(kAutoScrollId, kAutoScrollTimeoutMs);
2634 }
2635
2636 void Instance::DisableAutoscroll() {
2637   if (is_autoscroll_) {
2638     is_autoscroll_ = false;
2639     Invalidate(kAutoScrollId, autoscroll_rect_);
2640   }
2641 }
2642
2643 PP_CursorType_Dev Instance::CalculateAutoscroll(const pp::Point& mouse_pos) {
2644   // Scroll only if mouse pointer is outside of the anchor area.
2645   if (autoscroll_rect_.Contains(mouse_pos)) {
2646     autoscroll_x_ = 0;
2647     autoscroll_y_ = 0;
2648     return PP_CURSORTYPE_MIDDLEPANNING;
2649   }
2650
2651   // Relative position to the center of anchor area.
2652   pp::Point rel_pos = mouse_pos - autoscroll_rect_.CenterPoint();
2653
2654   // Calculate angle from the X axis. Angle is in range from -pi to pi.
2655   double angle = atan2(static_cast<double>(rel_pos.y()),
2656                        static_cast<double>(rel_pos.x()));
2657
2658   autoscroll_x_ = rel_pos.x() * kAutoScrollFactor;
2659   autoscroll_y_ = rel_pos.y() * kAutoScrollFactor;
2660
2661   // Angle is from -pi to pi. Screen Y is increasing toward bottom,
2662   // so negative angle represent north direction.
2663   if (angle < - (M_PI * 7.0 / 8.0)) {
2664     // going west
2665     return PP_CURSORTYPE_WESTPANNING;
2666   } else if (angle < - (M_PI * 5.0 / 8.0)) {
2667     // going north-west
2668     return PP_CURSORTYPE_NORTHWESTPANNING;
2669   } else if (angle < - (M_PI * 3.0 / 8.0)) {
2670     // going north.
2671     return PP_CURSORTYPE_NORTHPANNING;
2672   } else if (angle < - (M_PI * 1.0 / 8.0)) {
2673     // going north-east
2674     return PP_CURSORTYPE_NORTHEASTPANNING;
2675   } else if (angle < M_PI * 1.0 / 8.0) {
2676     // going east.
2677     return PP_CURSORTYPE_EASTPANNING;
2678   } else if (angle < M_PI * 3.0 / 8.0) {
2679     // going south-east
2680     return PP_CURSORTYPE_SOUTHEASTPANNING;
2681   } else if (angle < M_PI * 5.0 / 8.0) {
2682     // going south.
2683     return PP_CURSORTYPE_SOUTHPANNING;
2684   } else if (angle < M_PI * 7.0 / 8.0) {
2685     // going south-west
2686     return PP_CURSORTYPE_SOUTHWESTPANNING;
2687   }
2688
2689   // went around the circle, going west again
2690   return PP_CURSORTYPE_WESTPANNING;
2691 }
2692
2693 void Instance::ConfigureNumberImageGenerator() {
2694   std::vector<pp::ImageData> num_images = GetThumbnailResources();
2695   pp::ImageData number_background = CreateResourceImage(
2696       PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_NUM_BACKGROUND);
2697   number_image_generator_->Configure(number_background,
2698                                      num_images,
2699                                      device_scale_);
2700 }
2701
2702 NumberImageGenerator* Instance::number_image_generator() {
2703   if (!number_image_generator_.get()) {
2704     number_image_generator_.reset(new NumberImageGenerator(this));
2705     ConfigureNumberImageGenerator();
2706   }
2707   return number_image_generator_.get();
2708 }
2709
2710 int Instance::GetScaled(int x) const {
2711   return static_cast<int>(x * device_scale_);
2712 }
2713
2714 void Instance::UserMetricsRecordAction(const std::string& action) {
2715   pp::PDF::UserMetricsRecordAction(this, pp::Var(action));
2716 }
2717
2718 PDFScriptableObject::PDFScriptableObject(Instance* instance)
2719     : instance_(instance) {
2720 }
2721
2722 PDFScriptableObject::~PDFScriptableObject() {
2723 }
2724
2725 bool PDFScriptableObject::HasMethod(const pp::Var& name, pp::Var* exception) {
2726   return instance_->HasScriptableMethod(name, exception);
2727 }
2728
2729 pp::Var PDFScriptableObject::Call(const pp::Var& method,
2730                                   const std::vector<pp::Var>& args,
2731                                   pp::Var* exception) {
2732   return instance_->CallScriptableMethod(method, args, exception);
2733 }
2734
2735 }  // namespace chrome_pdf