Defect 248426: Speak rendered text when no selection is made on Mac

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 998 matching lines @@
   else
     focused_plugin_id_ = -1;
 }
 #endif
 
 #if defined(OS_MACOSX)
 void RenderViewImpl::PluginFocusChanged(bool focused, int plugin_id) {
   Send(new ViewHostMsg_PluginFocusChanged(routing_id(), focused, plugin_id));
 }
 
+void RenderViewImpl::OnGetRenderedText() {
+  if (!webview())
+    return;
+  // Get rendered text from WebLocalFrame.
+  std::string text = webview()->mainFrame()->contentAsText(
+      std::numeric_limits<size_t>::max()).utf8();

[jamesr, 2014/07/01 01:33:29]

this could be gigantic and there's a fairly small limit on the size of IPCs that
the browser will accept before it kills the render process. did you test this on
a page with lots of text?

[sarka, 2014/07/01 02:03:10]

Apparently I haven't tested with lots of text. I wouldn't mind taking an
alternate route though. Doesn't WebContents->SelectAll() do something similar?

+
+  Send(new ViewMsg_GetRenderedTextCompleted(routing_id(), text));
+}
+
 void RenderViewImpl::StartPluginIme() {
   IPC::Message* msg = new ViewHostMsg_StartPluginIme(routing_id());
   // This message can be sent during event-handling, and needs to be delivered
   // within that context.
   msg->set_unblock(true);
   Send(msg);
 }
 #endif  // defined(OS_MACOSX)
 
 #endif  // ENABLE_PLUGINS
@@ skipping 92 matching lines @@
     IPC_MESSAGE_HANDLER(ViewMsg_SelectWordAroundCaret, OnSelectWordAroundCaret)
 #if defined(OS_ANDROID)
     IPC_MESSAGE_HANDLER(InputMsg_ActivateNearestFindResult,
                         OnActivateNearestFindResult)
     IPC_MESSAGE_HANDLER(ViewMsg_FindMatchRects, OnFindMatchRects)
     IPC_MESSAGE_HANDLER(ViewMsg_SelectPopupMenuItems, OnSelectPopupMenuItems)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateTopControlsState,
                         OnUpdateTopControlsState)
     IPC_MESSAGE_HANDLER(ViewMsg_ExtractSmartClipData, OnExtractSmartClipData)
 #elif defined(OS_MACOSX)
+    IPC_MESSAGE_HANDLER(ViewMsg_GetRenderedText,
+                        OnGetRenderedText)
     IPC_MESSAGE_HANDLER(ViewMsg_PluginImeCompositionCompleted,
                         OnPluginImeCompositionCompleted)
     IPC_MESSAGE_HANDLER(ViewMsg_SelectPopupMenuItem, OnSelectPopupMenuItem)
     IPC_MESSAGE_HANDLER(ViewMsg_SetInLiveResize, OnSetInLiveResize)
     IPC_MESSAGE_HANDLER(ViewMsg_SetWindowVisibility, OnSetWindowVisibility)
     IPC_MESSAGE_HANDLER(ViewMsg_WindowFrameChanged, OnWindowFrameChanged)
 #endif
     // Adding a new message? Add platform independent ones first, then put the
     // platform specific ones at the end.
 
@@ skipping 2872 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content