src/chrome/browser/printing/print_preview_dialog_controller.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 "chrome/browser/printing/print_preview_dialog_controller.h"
   6
   7 #include <algorithm>
   8 #include <string>
   9
  10 #include "base/auto_reset.h"
  11 #include "base/path_service.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "chrome/browser/chrome_notification_types.h"
  14 #include "chrome/browser/browser_process.h"
  15 #include "chrome/browser/plugins/chrome_plugin_service_filter.h"
  16 #include "chrome/browser/printing/print_view_manager.h"
  17 #include "chrome/browser/profiles/profile.h"
  18 #include "chrome/browser/ui/browser.h"
  19 #include "chrome/browser/ui/browser_finder.h"
  20 #include "chrome/browser/ui/browser_navigator.h"
  21 #include "chrome/browser/ui/browser_window.h"
  22 #include "chrome/browser/ui/host_desktop.h"
  23 #include "chrome/browser/ui/webui/chrome_web_contents_handler.h"
  24 #include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
  25 #include "chrome/browser/ui/webui/print_preview/print_preview_ui.h"
  26 #include "chrome/common/chrome_content_client.h"
  27 #include "chrome/common/chrome_paths.h"
  28 #include "chrome/common/url_constants.h"
  29 #include "components/web_modal/web_contents_modal_dialog_host.h"
  30 #include "content/public/browser/navigation_controller.h"
  31 #include "content/public/browser/navigation_details.h"
  32 #include "content/public/browser/navigation_entry.h"
  33 #include "content/public/browser/plugin_service.h"
  34 #include "content/public/browser/render_frame_host.h"
  35 #include "content/public/browser/render_process_host.h"
  36 #include "content/public/browser/render_process_host_observer.h"
  37 #include "content/public/browser/render_view_host.h"
  38 #include "content/public/browser/web_contents.h"
  39 #include "content/public/browser/web_contents_delegate.h"
  40 #include "content/public/browser/web_contents_observer.h"
  41 #include "content/public/browser/web_contents_view.h"
  42 #include "content/public/common/webplugininfo.h"
  43 #include "ui/web_dialogs/web_dialog_delegate.h"
  44 #include "ui/web_dialogs/web_dialog_web_contents_delegate.h"
  45
  46 using content::NativeWebKeyboardEvent;
  47 using content::NavigationController;
  48 using content::RenderProcessHost;
  49 using content::WebContents;
  50 using content::WebUIMessageHandler;
  51 using ui::WebDialogDelegate;
  52 using ui::WebDialogWebContentsDelegate;
  53
  54 namespace {
  55
  56 void EnableInternalPDFPluginForContents(WebContents* preview_dialog) {
  57   // Always enable the internal PDF plugin for the print preview page.
  58   base::FilePath pdf_plugin_path;
  59   if (!PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf_plugin_path))
  60     return;
  61
  62   content::WebPluginInfo pdf_plugin;
  63   if (!content::PluginService::GetInstance()->GetPluginInfoByPath(
  64       pdf_plugin_path, &pdf_plugin))
  65     return;
  66
  67   ChromePluginServiceFilter::GetInstance()->OverridePluginForFrame(
  68       preview_dialog->GetRenderProcessHost()->GetID(),
  69       preview_dialog->GetMainFrame()->GetRoutingID(),
  70       GURL(), pdf_plugin);
  71 }
  72
  73 // WebDialogDelegate that specifies what the print preview dialog
  74 // will look like.
  75 class PrintPreviewDialogDelegate : public WebDialogDelegate {
  76  public:
  77   explicit PrintPreviewDialogDelegate(WebContents* initiator);
  78   virtual ~PrintPreviewDialogDelegate();
  79
  80   virtual ui::ModalType GetDialogModalType() const OVERRIDE;
  81   virtual base::string16 GetDialogTitle() const OVERRIDE;
  82   virtual GURL GetDialogContentURL() const OVERRIDE;
  83   virtual void GetWebUIMessageHandlers(
  84       std::vector<WebUIMessageHandler*>* handlers) const OVERRIDE;
  85   virtual void GetDialogSize(gfx::Size* size) const OVERRIDE;
  86   virtual std::string GetDialogArgs() const OVERRIDE;
  87   virtual void OnDialogClosed(const std::string& json_retval) OVERRIDE;
  88   virtual void OnCloseContents(WebContents* source,
  89                                bool* out_close_dialog) OVERRIDE;
  90   virtual bool ShouldShowDialogTitle() const OVERRIDE;
  91
  92  private:
  93   WebContents* initiator_;
  94
  95   DISALLOW_COPY_AND_ASSIGN(PrintPreviewDialogDelegate);
  96 };
  97
  98 PrintPreviewDialogDelegate::PrintPreviewDialogDelegate(WebContents* initiator)
  99     : initiator_(initiator) {
 100 }
 101
 102 PrintPreviewDialogDelegate::~PrintPreviewDialogDelegate() {
 103 }
 104
 105 ui::ModalType PrintPreviewDialogDelegate::GetDialogModalType() const {
 106   // Not used, returning dummy value.
 107   NOTREACHED();
 108   return ui::MODAL_TYPE_WINDOW;
 109 }
 110
 111 base::string16 PrintPreviewDialogDelegate::GetDialogTitle() const {
 112   // Only used on Windows? UI folks prefer no title.
 113   return base::string16();
 114 }
 115
 116 GURL PrintPreviewDialogDelegate::GetDialogContentURL() const {
 117   return GURL(chrome::kChromeUIPrintURL);
 118 }
 119
 120 void PrintPreviewDialogDelegate::GetWebUIMessageHandlers(
 121     std::vector<WebUIMessageHandler*>* /* handlers */) const {
 122   // PrintPreviewUI adds its own message handlers.
 123 }
 124
 125 void PrintPreviewDialogDelegate::GetDialogSize(gfx::Size* size) const {
 126   DCHECK(size);
 127   const gfx::Size kMinDialogSize(800, 480);
 128   const int kBorder = 25;
 129   *size = kMinDialogSize;
 130
 131   web_modal::WebContentsModalDialogHost* host = NULL;
 132   Browser* browser = chrome::FindBrowserWithWebContents(initiator_);
 133   if (browser)
 134     host = browser->window()->GetWebContentsModalDialogHost();
 135
 136   if (host) {
 137     size->SetToMax(host->GetMaximumDialogSize());
 138     size->Enlarge(-2 * kBorder, -kBorder);
 139   } else {
 140     size->SetToMax(initiator_->GetView()->GetContainerSize());
 141     size->Enlarge(-2 * kBorder, -2 * kBorder);
 142   }
 143
 144 #if defined(OS_MACOSX)
 145   // Limit the maximum size on MacOS X.
 146   // http://crbug.com/105815
 147   const gfx::Size kMaxDialogSize(1000, 660);
 148   size->SetToMin(kMaxDialogSize);
 149 #endif
 150 }
 151
 152 std::string PrintPreviewDialogDelegate::GetDialogArgs() const {
 153   return std::string();
 154 }
 155
 156 void PrintPreviewDialogDelegate::OnDialogClosed(
 157     const std::string& /* json_retval */) {
 158 }
 159
 160 void PrintPreviewDialogDelegate::OnCloseContents(WebContents* /* source */,
 161                                                  bool* out_close_dialog) {
 162   if (out_close_dialog)
 163     *out_close_dialog = true;
 164 }
 165
 166 bool PrintPreviewDialogDelegate::ShouldShowDialogTitle() const {
 167   return false;
 168 }
 169
 170 // WebContentsDelegate that forwards shortcut keys in the print preview
 171 // renderer to the browser.
 172 class PrintPreviewWebContentDelegate : public WebDialogWebContentsDelegate {
 173  public:
 174   PrintPreviewWebContentDelegate(Profile* profile, WebContents* initiator);
 175   virtual ~PrintPreviewWebContentDelegate();
 176
 177   // Overridden from WebDialogWebContentsDelegate:
 178   virtual void HandleKeyboardEvent(
 179       WebContents* source,
 180       const NativeWebKeyboardEvent& event) OVERRIDE;
 181
 182  private:
 183   WebContents* initiator_;
 184
 185   DISALLOW_COPY_AND_ASSIGN(PrintPreviewWebContentDelegate);
 186 };
 187
 188 PrintPreviewWebContentDelegate::PrintPreviewWebContentDelegate(
 189     Profile* profile,
 190     WebContents* initiator)
 191     : WebDialogWebContentsDelegate(profile, new ChromeWebContentsHandler),
 192       initiator_(initiator) {}
 193
 194 PrintPreviewWebContentDelegate::~PrintPreviewWebContentDelegate() {}
 195
 196 void PrintPreviewWebContentDelegate::HandleKeyboardEvent(
 197     WebContents* source,
 198     const NativeWebKeyboardEvent& event) {
 199   // Disabled on Mac due to http://crbug.com/112173
 200 #if !defined(OS_MACOSX)
 201   Browser* current_browser = chrome::FindBrowserWithWebContents(initiator_);
 202   if (!current_browser)
 203     return;
 204   current_browser->window()->HandleKeyboardEvent(event);
 205 #endif
 206 }
 207
 208 }  // namespace
 209
 210 namespace printing {
 211
 212 struct PrintPreviewDialogController::Operation {
 213   class Observer : public content::WebContentsObserver,
 214                    public content::RenderProcessHostObserver {
 215    public:
 216     Observer();
 217     virtual ~Observer();
 218
 219     void StartObserving(PrintPreviewDialogController* owner,
 220                         WebContents* web_contents);
 221     void StopObserving();
 222
 223    private:
 224     // content::WebContentsObserver
 225     virtual void WebContentsDestroyed(WebContents* web_contents) OVERRIDE;
 226     virtual void NavigationEntryCommitted(
 227         const content::LoadCommittedDetails& load_details) OVERRIDE;
 228     // content::RenderProcessHostObserver
 229     virtual void RenderProcessExited(RenderProcessHost* host,
 230                                      base::ProcessHandle handle,
 231                                      base::TerminationStatus status,
 232                                      int exit_code) OVERRIDE;
 233     virtual void RenderProcessHostDestroyed(RenderProcessHost* host) OVERRIDE;
 234
 235     PrintPreviewDialogController* owner_;
 236     RenderProcessHost* host_;
 237   };
 238
 239   Operation();
 240
 241   WebContents* preview_dialog;
 242   WebContents* initiator;
 243   Observer preview_dialog_observer;
 244   Observer initiator_observer;
 245
 246   DISALLOW_COPY_AND_ASSIGN(Operation);
 247 };
 248
 249 PrintPreviewDialogController::Operation::Operation() : preview_dialog(NULL),
 250                                                        initiator(NULL) {
 251 }
 252
 253 PrintPreviewDialogController::Operation::Observer::Observer() : owner_(NULL),
 254                                                                 host_(NULL) {
 255 }
 256
 257 PrintPreviewDialogController::Operation::Observer::~Observer() {
 258   StopObserving();
 259 }
 260
 261 void PrintPreviewDialogController::Operation::Observer::StartObserving(
 262     PrintPreviewDialogController* owner,
 263     WebContents* web_contents) {
 264   owner_ = owner;
 265   Observe(web_contents);
 266   host_ = web_contents->GetRenderProcessHost();
 267   host_->AddObserver(this);
 268 }
 269
 270 void PrintPreviewDialogController::Operation::Observer::StopObserving() {
 271   Observe(NULL);
 272   if (host_) {
 273     host_->RemoveObserver(this);
 274     host_ = NULL;
 275   }
 276 }
 277
 278 void PrintPreviewDialogController::Operation::Observer::WebContentsDestroyed(
 279     WebContents* web_contents) {
 280   owner_->OnWebContentsDestroyed(web_contents);
 281 }
 282
 283 void
 284 PrintPreviewDialogController::Operation::Observer::NavigationEntryCommitted(
 285     const content::LoadCommittedDetails& load_details) {
 286   owner_->OnNavigationEntryCommitted(web_contents(), &load_details);
 287 }
 288
 289 void PrintPreviewDialogController::Operation::Observer::RenderProcessExited(
 290     RenderProcessHost* host,
 291     base::ProcessHandle handle,
 292     base::TerminationStatus status,
 293     int exit_code) {
 294   owner_->OnRenderProcessExited(host);
 295 }
 296
 297 void
 298 PrintPreviewDialogController::Operation::Observer::RenderProcessHostDestroyed(
 299     RenderProcessHost* host) {
 300   host_ = NULL;
 301 }
 302
 303 PrintPreviewDialogController::PrintPreviewDialogController()
 304     : waiting_for_new_preview_page_(false),
 305       is_creating_print_preview_dialog_(false) {
 306 }
 307
 308 // static
 309 PrintPreviewDialogController* PrintPreviewDialogController::GetInstance() {
 310   if (!g_browser_process)
 311     return NULL;
 312   return g_browser_process->print_preview_dialog_controller();
 313 }
 314
 315 // static
 316 void PrintPreviewDialogController::PrintPreview(WebContents* initiator) {
 317   if (initiator->ShowingInterstitialPage())
 318     return;
 319
 320   PrintPreviewDialogController* dialog_controller = GetInstance();
 321   if (!dialog_controller)
 322     return;
 323   if (!dialog_controller->GetOrCreatePreviewDialog(initiator))
 324     PrintViewManager::FromWebContents(initiator)->PrintPreviewDone();
 325 }
 326
 327 WebContents* PrintPreviewDialogController::GetOrCreatePreviewDialog(
 328     WebContents* initiator) {
 329   DCHECK(initiator);
 330
 331   // Get the print preview dialog for |initiator|.
 332   WebContents* preview_dialog = GetPrintPreviewForContents(initiator);
 333   if (!preview_dialog)
 334     return CreatePrintPreviewDialog(initiator);
 335
 336   // Show the initiator holding the existing preview dialog.
 337   initiator->GetDelegate()->ActivateContents(initiator);
 338   return preview_dialog;
 339 }
 340
 341 WebContents* PrintPreviewDialogController::GetPrintPreviewForContents(
 342     WebContents* contents) const {
 343   for (size_t i = 0; i < preview_operations_.size(); ++i) {
 344     Operation* operation = preview_operations_[i];
 345     if (operation->preview_dialog == contents ||
 346         operation->initiator == contents) {
 347       return operation->preview_dialog;
 348     }
 349   }
 350   return NULL;
 351 }
 352
 353 WebContents* PrintPreviewDialogController::GetInitiator(
 354     WebContents* preview_dialog) {
 355   for (size_t i = 0; i < preview_operations_.size(); ++i) {
 356     Operation* operation = preview_operations_[i];
 357     if (operation->preview_dialog == preview_dialog)
 358       return operation->initiator;
 359   }
 360   return NULL;
 361 }
 362
 363 // static
 364 bool PrintPreviewDialogController::IsPrintPreviewDialog(WebContents* contents) {
 365   return IsPrintPreviewURL(contents->GetURL());
 366 }
 367
 368 // static
 369 bool PrintPreviewDialogController::IsPrintPreviewURL(const GURL& url) {
 370   return (url.SchemeIs(content::kChromeUIScheme) &&
 371           url.host() == chrome::kChromeUIPrintHost);
 372 }
 373
 374 void PrintPreviewDialogController::EraseInitiatorInfo(
 375     WebContents* preview_dialog) {
 376   for (size_t i = 0; i < preview_operations_.size(); ++i) {
 377     Operation* operation = preview_operations_[i];
 378     if (operation->preview_dialog == preview_dialog) {
 379       operation->initiator_observer.StopObserving();
 380       operation->initiator = NULL;
 381       return;
 382     }
 383   }
 384 }
 385
 386 PrintPreviewDialogController::~PrintPreviewDialogController() {
 387   DCHECK_EQ(0U, preview_operations_.size());
 388 }
 389
 390 void PrintPreviewDialogController::OnRenderProcessExited(
 391     RenderProcessHost* rph) {
 392   // Store contents in a vector and deal with them after iterating through
 393   // |preview_operations_| because RemoveFoo() can change |preview_operations_|.
 394   std::vector<WebContents*> closed_initiators;
 395   std::vector<WebContents*> closed_preview_dialogs;
 396   for (size_t i = 0; i < preview_operations_.size(); ++i) {
 397     Operation* operation = preview_operations_[i];
 398     WebContents* preview_dialog = operation->preview_dialog;
 399     WebContents* initiator = operation->initiator;
 400     if (preview_dialog->GetRenderProcessHost() == rph) {
 401       closed_preview_dialogs.push_back(preview_dialog);
 402     } else if (initiator &&
 403                initiator->GetRenderProcessHost() == rph) {
 404       closed_initiators.push_back(initiator);
 405     }
 406   }
 407
 408   for (size_t i = 0; i < closed_preview_dialogs.size(); ++i) {
 409     RemovePreviewDialog(closed_preview_dialogs[i]);
 410     if (content::WebUI* web_ui = closed_preview_dialogs[i]->GetWebUI()) {
 411       PrintPreviewUI* print_preview_ui =
 412           static_cast<PrintPreviewUI*>(web_ui->GetController());
 413       if (print_preview_ui)
 414         print_preview_ui->OnPrintPreviewDialogClosed();
 415     }
 416   }
 417
 418   for (size_t i = 0; i < closed_initiators.size(); ++i)
 419     RemoveInitiator(closed_initiators[i]);
 420 }
 421
 422 void PrintPreviewDialogController::OnWebContentsDestroyed(
 423     WebContents* contents) {
 424   WebContents* preview_dialog = GetPrintPreviewForContents(contents);
 425   if (!preview_dialog) {
 426     NOTREACHED();
 427     return;
 428   }
 429
 430   if (contents == preview_dialog)
 431     RemovePreviewDialog(contents);
 432   else
 433     RemoveInitiator(contents);
 434 }
 435
 436 void PrintPreviewDialogController::OnNavigationEntryCommitted(
 437     WebContents* contents, const content::LoadCommittedDetails* details) {
 438   WebContents* preview_dialog = GetPrintPreviewForContents(contents);
 439   if (!preview_dialog) {
 440     NOTREACHED();
 441     return;
 442   }
 443
 444   if (contents == preview_dialog) {
 445     // Preview dialog navigated.
 446     if (details) {
 447       content::PageTransition transition_type =
 448           details->entry->GetTransitionType();
 449       content::NavigationType nav_type = details->type;
 450
 451       // New |preview_dialog| is created. Don't update/erase map entry.
 452       if (waiting_for_new_preview_page_ &&
 453           transition_type == content::PAGE_TRANSITION_AUTO_TOPLEVEL &&
 454           nav_type == content::NAVIGATION_TYPE_NEW_PAGE) {
 455         waiting_for_new_preview_page_ = false;
 456         SaveInitiatorTitle(preview_dialog);
 457         return;
 458       }
 459
 460       // Cloud print sign-in causes a reload.
 461       if (!waiting_for_new_preview_page_ &&
 462           transition_type == content::PAGE_TRANSITION_RELOAD &&
 463           nav_type == content::NAVIGATION_TYPE_EXISTING_PAGE &&
 464           IsPrintPreviewURL(details->previous_url)) {
 465         return;
 466       }
 467     }
 468     NOTREACHED();
 469     return;
 470   }
 471
 472   RemoveInitiator(contents);
 473 }
 474
 475 WebContents* PrintPreviewDialogController::CreatePrintPreviewDialog(
 476     WebContents* initiator) {
 477   base::AutoReset<bool> auto_reset(&is_creating_print_preview_dialog_, true);
 478   Profile* profile =
 479       Profile::FromBrowserContext(initiator->GetBrowserContext());
 480
 481   // |web_dialog_ui_delegate| deletes itself in
 482   // PrintPreviewDialogDelegate::OnDialogClosed().
 483   WebDialogDelegate* web_dialog_delegate =
 484       new PrintPreviewDialogDelegate(initiator);
 485   // |web_dialog_delegate|'s owner is |constrained_delegate|.
 486   PrintPreviewWebContentDelegate* pp_wcd =
 487       new PrintPreviewWebContentDelegate(profile, initiator);
 488   ConstrainedWebDialogDelegate* constrained_delegate =
 489       CreateConstrainedWebDialog(profile,
 490                                  web_dialog_delegate,
 491                                  pp_wcd,
 492                                  initiator);
 493   WebContents* preview_dialog = constrained_delegate->GetWebContents();
 494   EnableInternalPDFPluginForContents(preview_dialog);
 495   PrintViewManager::CreateForWebContents(preview_dialog);
 496
 497   waiting_for_new_preview_page_ = true;
 498
 499   // Add an entry to the map.
 500   Operation* operation = new Operation;
 501   operation->preview_dialog = preview_dialog;
 502   operation->initiator = initiator;
 503   operation->preview_dialog_observer.StartObserving(this, preview_dialog);
 504   operation->initiator_observer.StartObserving(this, initiator);
 505   preview_operations_.push_back(operation);
 506
 507   return preview_dialog;
 508 }
 509
 510 void PrintPreviewDialogController::SaveInitiatorTitle(
 511     WebContents* preview_dialog) {
 512   WebContents* initiator = GetInitiator(preview_dialog);
 513   if (initiator && preview_dialog->GetWebUI()) {
 514     PrintPreviewUI* print_preview_ui = static_cast<PrintPreviewUI*>(
 515         preview_dialog->GetWebUI()->GetController());
 516     print_preview_ui->SetInitiatorTitle(
 517         PrintViewManager::FromWebContents(initiator)->RenderSourceName());
 518   }
 519 }
 520
 521 void PrintPreviewDialogController::RemoveInitiator(
 522     WebContents* initiator) {
 523   WebContents* preview_dialog = GetPrintPreviewForContents(initiator);
 524   DCHECK(preview_dialog);
 525
 526   // Update the map entry first, so when the print preview dialog gets destroyed
 527   // and reaches RemovePreviewDialog(), it does not attempt to also remove the
 528   // initiator's observers.
 529   EraseInitiatorInfo(preview_dialog);
 530
 531   PrintViewManager::FromWebContents(initiator)->PrintPreviewDone();
 532
 533   // initiator is closed. Close the print preview dialog too.
 534   if (content::WebUI* web_ui = preview_dialog->GetWebUI()) {
 535     PrintPreviewUI* print_preview_ui =
 536         static_cast<PrintPreviewUI*>(web_ui->GetController());
 537     if (print_preview_ui)
 538       print_preview_ui->OnInitiatorClosed();
 539   }
 540 }
 541
 542 void PrintPreviewDialogController::RemovePreviewDialog(
 543     WebContents* preview_dialog) {
 544   for (size_t i = 0; i < preview_operations_.size(); ++i) {
 545     Operation* operation = preview_operations_[i];
 546     if (operation->preview_dialog == preview_dialog) {
 547       // Remove the initiator's observers before erasing the mapping.
 548       if (operation->initiator) {
 549         operation->initiator_observer.StopObserving();
 550         PrintViewManager::FromWebContents(operation->initiator)->
 551             PrintPreviewDone();
 552       }
 553
 554       // Print preview WebContents is destroyed. Notify |PrintPreviewUI| to
 555       // abort the initiator preview request.
 556       if (content::WebUI* web_ui = preview_dialog->GetWebUI()) {
 557         PrintPreviewUI* print_preview_ui =
 558             static_cast<PrintPreviewUI*>(web_ui->GetController());
 559         if (print_preview_ui)
 560           print_preview_ui->OnPrintPreviewDialogDestroyed();
 561       }
 562
 563       preview_operations_.erase(preview_operations_.begin() + i);
 564       delete operation;
 565
 566       return;
 567     }
 568   }
 569   NOTREACHED();
 570 }
 571
 572 }  // namespace printing