src/android_webview/renderer/aw_render_view_ext.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 "android_webview/renderer/aw_render_view_ext.h"
   6
   7 #include <string>
   8
   9 #include "android_webview/common/aw_hit_test_data.h"
  10 #include "android_webview/common/render_view_messages.h"
  11 #include "base/bind.h"
  12 #include "base/strings/string_piece.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "base/time/time.h"
  15 #include "content/public/common/url_constants.h"
  16 #include "content/public/renderer/android_content_detection_prefixes.h"
  17 #include "content/public/renderer/document_state.h"
  18 #include "content/public/renderer/render_view.h"
  19 #include "skia/ext/refptr.h"
  20 #include "third_party/WebKit/public/platform/WebSize.h"
  21 #include "third_party/WebKit/public/platform/WebURL.h"
  22 #include "third_party/WebKit/public/platform/WebVector.h"
  23 #include "third_party/WebKit/public/web/WebDataSource.h"
  24 #include "third_party/WebKit/public/web/WebDocument.h"
  25 #include "third_party/WebKit/public/web/WebElement.h"
  26 #include "third_party/WebKit/public/web/WebElementCollection.h"
  27 #include "third_party/WebKit/public/web/WebFrame.h"
  28 #include "third_party/WebKit/public/web/WebHitTestResult.h"
  29 #include "third_party/WebKit/public/web/WebImageCache.h"
  30 #include "third_party/WebKit/public/web/WebNode.h"
  31 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  32 #include "third_party/WebKit/public/web/WebView.h"
  33 #include "url/url_canon.h"
  34 #include "url/url_util.h"
  35
  36 namespace android_webview {
  37
  38 namespace {
  39
  40 GURL GetAbsoluteUrl(const blink::WebNode& node,
  41                     const base::string16& url_fragment) {
  42   return GURL(node.document().completeURL(url_fragment));
  43 }
  44
  45 base::string16 GetHref(const blink::WebElement& element) {
  46   // Get the actual 'href' attribute, which might relative if valid or can
  47   // possibly contain garbage otherwise, so not using absoluteLinkURL here.
  48   return element.getAttribute("href");
  49 }
  50
  51 GURL GetAbsoluteSrcUrl(const blink::WebElement& element) {
  52   if (element.isNull())
  53     return GURL();
  54   return GetAbsoluteUrl(element, element.getAttribute("src"));
  55 }
  56
  57 blink::WebElement GetImgChild(const blink::WebElement& element) {
  58   // This implementation is incomplete (for example if is an area tag) but
  59   // matches the original WebViewClassic implementation.
  60
  61   blink::WebElementCollection collection = element.getElementsByTagName("img");
  62   DCHECK(!collection.isNull());
  63   return collection.firstItem();
  64 }
  65
  66 bool RemovePrefixAndAssignIfMatches(const base::StringPiece& prefix,
  67                                     const GURL& url,
  68                                     std::string* dest) {
  69   const base::StringPiece spec(url.possibly_invalid_spec());
  70
  71   if (spec.starts_with(prefix)) {
  72     url_canon::RawCanonOutputW<1024> output;
  73     url_util::DecodeURLEscapeSequences(spec.data() + prefix.length(),
  74         spec.length() - prefix.length(), &output);
  75     std::string decoded_url = base::UTF16ToUTF8(
  76         base::string16(output.data(), output.length()));
  77     dest->assign(decoded_url.begin(), decoded_url.end());
  78     return true;
  79   }
  80   return false;
  81 }
  82
  83 void DistinguishAndAssignSrcLinkType(const GURL& url, AwHitTestData* data) {
  84   if (RemovePrefixAndAssignIfMatches(
  85       content::kAddressPrefix,
  86       url,
  87       &data->extra_data_for_type)) {
  88     data->type = AwHitTestData::GEO_TYPE;
  89   } else if (RemovePrefixAndAssignIfMatches(
  90       content::kPhoneNumberPrefix,
  91       url,
  92       &data->extra_data_for_type)) {
  93     data->type = AwHitTestData::PHONE_TYPE;
  94   } else if (RemovePrefixAndAssignIfMatches(
  95       content::kEmailPrefix,
  96       url,
  97       &data->extra_data_for_type)) {
  98     data->type = AwHitTestData::EMAIL_TYPE;
  99   } else {
 100     data->type = AwHitTestData::SRC_LINK_TYPE;
 101     data->extra_data_for_type = url.possibly_invalid_spec();
 102     if (!data->extra_data_for_type.empty())
 103       data->href = base::UTF8ToUTF16(data->extra_data_for_type);
 104   }
 105 }
 106
 107 void PopulateHitTestData(const GURL& absolute_link_url,
 108                          const GURL& absolute_image_url,
 109                          bool is_editable,
 110                          AwHitTestData* data) {
 111   // Note: Using GURL::is_empty instead of GURL:is_valid due to the
 112   // WebViewClassic allowing any kind of protocol which GURL::is_valid
 113   // disallows. Similar reasons for using GURL::possibly_invalid_spec instead of
 114   // GURL::spec.
 115   if (!absolute_image_url.is_empty())
 116     data->img_src = absolute_image_url;
 117
 118   const bool is_javascript_scheme =
 119       absolute_link_url.SchemeIs(content::kJavaScriptScheme);
 120   const bool has_link_url = !absolute_link_url.is_empty();
 121   const bool has_image_url = !absolute_image_url.is_empty();
 122
 123   if (has_link_url && !has_image_url && !is_javascript_scheme) {
 124     DistinguishAndAssignSrcLinkType(absolute_link_url, data);
 125   } else if (has_link_url && has_image_url && !is_javascript_scheme) {
 126     data->type = AwHitTestData::SRC_IMAGE_LINK_TYPE;
 127     data->extra_data_for_type = data->img_src.possibly_invalid_spec();
 128     if (absolute_link_url.is_valid())
 129       data->href = base::UTF8ToUTF16(absolute_link_url.possibly_invalid_spec());
 130   } else if (!has_link_url && has_image_url) {
 131     data->type = AwHitTestData::IMAGE_TYPE;
 132     data->extra_data_for_type = data->img_src.possibly_invalid_spec();
 133   } else if (is_editable) {
 134     data->type = AwHitTestData::EDIT_TEXT_TYPE;
 135     DCHECK(data->extra_data_for_type.length() == 0);
 136   }
 137 }
 138
 139 }  // namespace
 140
 141 AwRenderViewExt::AwRenderViewExt(content::RenderView* render_view)
 142     : content::RenderViewObserver(render_view), page_scale_factor_(0.0f) {
 143 }
 144
 145 AwRenderViewExt::~AwRenderViewExt() {
 146 }
 147
 148 // static
 149 void AwRenderViewExt::RenderViewCreated(content::RenderView* render_view) {
 150   new AwRenderViewExt(render_view);  // |render_view| takes ownership.
 151 }
 152
 153 bool AwRenderViewExt::OnMessageReceived(const IPC::Message& message) {
 154   bool handled = true;
 155   IPC_BEGIN_MESSAGE_MAP(AwRenderViewExt, message)
 156     IPC_MESSAGE_HANDLER(AwViewMsg_DocumentHasImages, OnDocumentHasImagesRequest)
 157     IPC_MESSAGE_HANDLER(AwViewMsg_DoHitTest, OnDoHitTest)
 158     IPC_MESSAGE_HANDLER(AwViewMsg_SetTextZoomFactor, OnSetTextZoomFactor)
 159     IPC_MESSAGE_HANDLER(AwViewMsg_ResetScrollAndScaleState,
 160                         OnResetScrollAndScaleState)
 161     IPC_MESSAGE_HANDLER(AwViewMsg_SetInitialPageScale, OnSetInitialPageScale)
 162     IPC_MESSAGE_HANDLER(AwViewMsg_SetFixedLayoutSize, OnSetFixedLayoutSize)
 163     IPC_MESSAGE_HANDLER(AwViewMsg_SetBackgroundColor, OnSetBackgroundColor)
 164     IPC_MESSAGE_UNHANDLED(handled = false)
 165   IPC_END_MESSAGE_MAP()
 166   return handled;
 167 }
 168
 169 void AwRenderViewExt::OnDocumentHasImagesRequest(int id) {
 170   bool hasImages = false;
 171   if (render_view()) {
 172     blink::WebView* webview = render_view()->GetWebView();
 173     if (webview) {
 174       blink::WebVector<blink::WebElement> images;
 175       webview->mainFrame()->document().images(images);
 176       hasImages = !images.isEmpty();
 177     }
 178   }
 179   Send(new AwViewHostMsg_DocumentHasImagesResponse(routing_id(), id,
 180                                                    hasImages));
 181 }
 182
 183 void AwRenderViewExt::DidCommitProvisionalLoad(blink::WebFrame* frame,
 184                                                bool is_new_navigation) {
 185   content::DocumentState* document_state =
 186       content::DocumentState::FromDataSource(frame->dataSource());
 187   if (document_state->can_load_local_resources()) {
 188     blink::WebSecurityOrigin origin = frame->document().securityOrigin();
 189     origin.grantLoadLocalResources();
 190   }
 191 }
 192
 193 void AwRenderViewExt::DidCommitCompositorFrame() {
 194   UpdatePageScaleFactor();
 195 }
 196
 197 void AwRenderViewExt::DidUpdateLayout() {
 198   if (check_contents_size_timer_.IsRunning())
 199     return;
 200
 201   check_contents_size_timer_.Start(FROM_HERE,
 202                                    base::TimeDelta::FromMilliseconds(0), this,
 203                                    &AwRenderViewExt::CheckContentsSize);
 204 }
 205
 206 void AwRenderViewExt::UpdatePageScaleFactor() {
 207   if (page_scale_factor_ != render_view()->GetWebView()->pageScaleFactor()) {
 208     page_scale_factor_ = render_view()->GetWebView()->pageScaleFactor();
 209     Send(new AwViewHostMsg_PageScaleFactorChanged(routing_id(),
 210                                                   page_scale_factor_));
 211   }
 212 }
 213
 214 void AwRenderViewExt::CheckContentsSize() {
 215   if (!render_view()->GetWebView())
 216     return;
 217
 218   gfx::Size contents_size;
 219
 220   blink::WebFrame* main_frame = render_view()->GetWebView()->mainFrame();
 221   if (main_frame)
 222     contents_size = main_frame->contentsSize();
 223
 224   // Fall back to contentsPreferredMinimumSize if the mainFrame is reporting a
 225   // 0x0 size (this happens during initial load).
 226   if (contents_size.IsEmpty()) {
 227     contents_size = render_view()->GetWebView()->contentsPreferredMinimumSize();
 228   }
 229
 230   if (contents_size == last_sent_contents_size_)
 231     return;
 232
 233   last_sent_contents_size_ = contents_size;
 234   Send(new AwViewHostMsg_OnContentsSizeChanged(routing_id(), contents_size));
 235 }
 236
 237 void AwRenderViewExt::Navigate(const GURL& url) {
 238   // Navigate is called only on NEW navigations, so WebImageCache won't be freed
 239   // when the user just clicks on links, but only when a navigation is started,
 240   // for instance via loadUrl. A better approach would be clearing the cache on
 241   // cross-site boundaries, however this would require too many changes both on
 242   // the browser side (in RenderViewHostManger), to the IPCmessages and to the
 243   // RenderViewObserver. Thus, clearing decoding image cache on Navigate, seems
 244   // a more acceptable compromise.
 245   blink::WebImageCache::clear();
 246 }
 247
 248 void AwRenderViewExt::FocusedNodeChanged(const blink::WebNode& node) {
 249   if (node.isNull() || !node.isElementNode() || !render_view())
 250     return;
 251
 252   // Note: element is not const due to innerText() is not const.
 253   blink::WebElement element = node.toConst<blink::WebElement>();
 254   AwHitTestData data;
 255
 256   data.href = GetHref(element);
 257   data.anchor_text = element.innerText();
 258
 259   GURL absolute_link_url;
 260   if (node.isLink())
 261     absolute_link_url = GetAbsoluteUrl(node, data.href);
 262
 263   GURL absolute_image_url;
 264   const blink::WebElement child_img = GetImgChild(element);
 265   if (!child_img.isNull()) {
 266     absolute_image_url =
 267         GetAbsoluteSrcUrl(child_img);
 268   }
 269
 270   PopulateHitTestData(absolute_link_url,
 271                       absolute_image_url,
 272                       render_view()->IsEditableNode(node),
 273                       &data);
 274   Send(new AwViewHostMsg_UpdateHitTestData(routing_id(), data));
 275 }
 276
 277 void AwRenderViewExt::OnDoHitTest(int view_x, int view_y) {
 278   if (!render_view() || !render_view()->GetWebView())
 279     return;
 280
 281   const blink::WebHitTestResult result =
 282       render_view()->GetWebView()->hitTestResultAt(
 283           blink::WebPoint(view_x, view_y));
 284   AwHitTestData data;
 285
 286   if (!result.urlElement().isNull()) {
 287     data.anchor_text = result.urlElement().innerText();
 288     data.href = GetHref(result.urlElement());
 289   }
 290
 291   PopulateHitTestData(result.absoluteLinkURL(),
 292                       result.absoluteImageURL(),
 293                       result.isContentEditable(),
 294                       &data);
 295   Send(new AwViewHostMsg_UpdateHitTestData(routing_id(), data));
 296 }
 297
 298 void AwRenderViewExt::OnSetTextZoomFactor(float zoom_factor) {
 299   if (!render_view() || !render_view()->GetWebView())
 300     return;
 301   // Hide selection and autofill popups.
 302   render_view()->GetWebView()->hidePopups();
 303   render_view()->GetWebView()->setTextZoomFactor(zoom_factor);
 304 }
 305
 306 void AwRenderViewExt::OnResetScrollAndScaleState() {
 307   if (!render_view() || !render_view()->GetWebView())
 308     return;
 309   render_view()->GetWebView()->resetScrollAndScaleState();
 310 }
 311
 312 void AwRenderViewExt::OnSetInitialPageScale(double page_scale_factor) {
 313   if (!render_view() || !render_view()->GetWebView())
 314     return;
 315   render_view()->GetWebView()->setInitialPageScaleOverride(
 316       page_scale_factor);
 317 }
 318
 319 void AwRenderViewExt::OnSetFixedLayoutSize(const gfx::Size& size) {
 320   if (!render_view() || !render_view()->GetWebView())
 321     return;
 322   render_view()->GetWebView()->setFixedLayoutSize(size);
 323 }
 324
 325 void AwRenderViewExt::OnSetBackgroundColor(SkColor c) {
 326   if (!render_view() || !render_view()->GetWebView())
 327     return;
 328   render_view()->GetWebView()->setBaseBackgroundColor(c);
 329 }
 330
 331 }  // namespace android_webview