Implement accessibility support for CSS-transformed iframes.

content/browser/accessibility/accessibility_tree_formatter_blink.cc

 // Copyright (c) 2015 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 <stddef.h>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "content/browser/accessibility/accessibility_tree_formatter_blink.h"
+#include "ui/gfx/transform.h"
 
 namespace content {
 
 AccessibilityTreeFormatterBlink::AccessibilityTreeFormatterBlink()
     : AccessibilityTreeFormatter() {
 }
 
 AccessibilityTreeFormatterBlink::~AccessibilityTreeFormatterBlink() {
 }
 
@@ skipping 14 matching lines @@
     return node.InternalGetChild(i);
 }
 
 void AccessibilityTreeFormatterBlink::AddProperties(
     const BrowserAccessibility& node,
     base::DictionaryValue* dict) {
   dict->SetInteger("id", node.GetId());
 
   dict->SetString("internalRole", ui::ToString(node.GetData().role));
 
-  dict->SetInteger("boundsX", node.GetData().location.x());
-  dict->SetInteger("boundsY", node.GetData().location.y());
-  dict->SetInteger("boundsWidth", node.GetData().location.width());
-  dict->SetInteger("boundsHeight", node.GetData().location.height());
+  gfx::Rect bounds = node.GetData().location;
+  dict->SetInteger("boundsX", bounds.x());
+  dict->SetInteger("boundsY", bounds.y());
+  dict->SetInteger("boundsWidth", bounds.width());
+  dict->SetInteger("boundsHeight", bounds.height());
+
+  gfx::Rect page_bounds = node.GetLocalBoundsRect();
+  dict->SetInteger("pageBoundsX", page_bounds.x());
+  dict->SetInteger("pageBoundsY", page_bounds.y());
+  dict->SetInteger("pageBoundsWidth", page_bounds.width());
+  dict->SetInteger("pageBoundsHeight", page_bounds.height());
+
+  dict->SetBoolean("transform",
+                   node.GetData().transform.get() &&

[dcheng, 2016/03/17 19:53:18]

Nit: no .get()

[dmazzoni, 2016/03/18 17:10:59]

Done.

+                   !node.GetData().transform->IsIdentity());
 
   for (int state_index = ui::AX_STATE_NONE;
        state_index <= ui::AX_STATE_LAST;
        ++state_index) {
     auto state = static_cast<ui::AXState>(state_index);
     if (node.HasState(state))
       dict->SetBoolean(ui::ToString(state), true);
   }
 
   for (int attr_index = ui::AX_STRING_ATTRIBUTE_NONE;
@@ skipping 68 matching lines @@
     WriteAttribute(false, ui::ToString(state), &line);
   }
 
   WriteAttribute(false,
                  FormatCoordinates("location", "boundsX", "boundsY", dict),
                  &line);
   WriteAttribute(false,
                  FormatCoordinates("size", "boundsWidth", "boundsHeight", dict),
                  &line);
 
+  WriteAttribute(false,
+                 FormatCoordinates("pageLocation",
+                                   "pageBoundsX", "pageBoundsY", dict),
+                 &line);
+  WriteAttribute(false,
+                 FormatCoordinates("pageSize",
+                                   "pageBoundsWidth", "pageBoundsHeight", dict),
+                 &line);
+
+  bool transform;
+  if (dict.GetBoolean("transform", &transform) && transform)
+    WriteAttribute(false, "transform", &line);
+
   for (int attr_index = ui::AX_STRING_ATTRIBUTE_NONE;
        attr_index <= ui::AX_STRING_ATTRIBUTE_LAST;
        ++attr_index) {
     auto attr = static_cast<ui::AXStringAttribute>(attr_index);
     std::string string_value;
     if (!dict.GetString(ui::ToString(attr), &string_value))
       continue;
     WriteAttribute(false,
                    base::StringPrintf(
                        "%s='%s'",
@@ skipping 64 matching lines @@
 
 const std::string AccessibilityTreeFormatterBlink::GetAllowString() {
   return "@BLINK-ALLOW:";
 }
 
 const std::string AccessibilityTreeFormatterBlink::GetDenyString() {
   return "@BLINK-DENY:";
 }
 
 }  // namespace content