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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "content/renderer/accessibility/renderer_accessibility_focus_only.h" | 5 #include "content/renderer/accessibility/renderer_accessibility_focus_only.h" |
| 6 | 6 |
| 7 #include "content/renderer/render_frame_impl.h" |
| 7 #include "content/renderer/render_view_impl.h" | 8 #include "content/renderer/render_view_impl.h" |
| 8 #include "third_party/WebKit/public/web/WebDocument.h" | 9 #include "third_party/WebKit/public/web/WebDocument.h" |
| 9 #include "third_party/WebKit/public/web/WebElement.h" | 10 #include "third_party/WebKit/public/web/WebElement.h" |
| 10 #include "third_party/WebKit/public/web/WebLocalFrame.h" | 11 #include "third_party/WebKit/public/web/WebLocalFrame.h" |
| 11 #include "third_party/WebKit/public/web/WebNode.h" | 12 #include "third_party/WebKit/public/web/WebNode.h" |
| 12 #include "third_party/WebKit/public/web/WebView.h" | 13 #include "third_party/WebKit/public/web/WebView.h" |
| 13 #include "ui/accessibility/ax_node_data.h" | 14 #include "ui/accessibility/ax_node_data.h" |
| 14 | 15 |
| 15 using blink::WebDocument; | 16 using blink::WebDocument; |
| 16 using blink::WebElement; | 17 using blink::WebElement; |
| 17 using blink::WebNode; | 18 using blink::WebNode; |
| 18 using blink::WebView; | 19 using blink::WebView; |
| 19 | 20 |
| 20 namespace { | 21 namespace { |
| 21 // The root node will always have id 1. Let each child node have a new | 22 // The root node will always have id 1. Let each child node have a new |
| 22 // id starting with 2. | 23 // id starting with 2. |
| 23 const int kInitialId = 2; | 24 const int kInitialId = 2; |
| 24 } | 25 } |
| 25 | 26 |
| 26 namespace content { | 27 namespace content { |
| 27 | 28 |
| 28 RendererAccessibilityFocusOnly::RendererAccessibilityFocusOnly( | 29 RendererAccessibilityFocusOnly::RendererAccessibilityFocusOnly( |
| 29 RenderViewImpl* render_view) | 30 RenderFrameImpl* render_frame) |
| 30 : RendererAccessibility(render_view), | 31 : RendererAccessibility(render_frame), |
| 31 next_id_(kInitialId) { | 32 next_id_(kInitialId) { |
| 32 } | 33 } |
| 33 | 34 |
| 34 RendererAccessibilityFocusOnly::~RendererAccessibilityFocusOnly() { | 35 RendererAccessibilityFocusOnly::~RendererAccessibilityFocusOnly() { |
| 35 } | 36 } |
| 36 | 37 |
| 37 void RendererAccessibilityFocusOnly::HandleWebAccessibilityEvent( | 38 void RendererAccessibilityFocusOnly::HandleWebAccessibilityEvent( |
| 38 const blink::WebAXObject& obj, blink::WebAXEvent event) { | 39 const blink::WebAXObject& obj, blink::WebAXEvent event) { |
| 39 // Do nothing. | 40 // Do nothing. |
| 40 } | 41 } |
| 41 | 42 |
| 42 RendererAccessibilityType RendererAccessibilityFocusOnly::GetType() { | 43 RendererAccessibilityType RendererAccessibilityFocusOnly::GetType() { |
| 43 return RendererAccessibilityTypeFocusOnly; | 44 return RendererAccessibilityTypeFocusOnly; |
| 44 } | 45 } |
| 45 | 46 |
| 46 void RendererAccessibilityFocusOnly::FocusedNodeChanged(const WebNode& node) { | 47 void RendererAccessibilityFocusOnly::FocusedNodeChanged(const WebNode& node) { |
| 47 // Send the new accessible tree and post a native focus event. | 48 // Send the new accessible tree and post a native focus event. |
| 48 HandleFocusedNodeChanged(node, true); | 49 HandleFocusedNodeChanged(node, true); |
| 49 } | 50 } |
| 50 | 51 |
| 51 void RendererAccessibilityFocusOnly::DidFinishLoad( | 52 void RendererAccessibilityFocusOnly::DidFinishLoad( |
| 52 blink::WebLocalFrame* frame) { | 53 blink::WebLocalFrame* frame) { |
| 53 WebView* view = render_view()->GetWebView(); | 54 WebView* view = render_frame_->render_view()->GetWebView(); |
| 54 if (view->focusedFrame() != frame) | 55 if (view->focusedFrame() != frame) |
| 55 return; | 56 return; |
| 56 | 57 |
| 57 WebDocument document = frame->document(); | 58 WebDocument document = frame->document(); |
| 58 // Send an accessible tree to the browser, but do not post a native | 59 // Send an accessible tree to the browser, but do not post a native |
| 59 // focus event. This is important so that if focus is initially in an | 60 // focus event. This is important so that if focus is initially in an |
| 60 // editable text field, Windows will know to pop up the keyboard if the | 61 // editable text field, Windows will know to pop up the keyboard if the |
| 61 // user touches it and focus doesn't change. | 62 // user touches it and focus doesn't change. |
| 62 HandleFocusedNodeChanged(document.focusedElement(), false); | 63 HandleFocusedNodeChanged(document.focusedElement(), false); |
| 63 } | 64 } |
| 64 | 65 |
| 65 void RendererAccessibilityFocusOnly::HandleFocusedNodeChanged( | 66 void RendererAccessibilityFocusOnly::HandleFocusedNodeChanged( |
| 66 const WebNode& node, | 67 const WebNode& node, |
| 67 bool send_focus_event) { | 68 bool send_focus_event) { |
| 68 const WebDocument& document = GetMainDocument(); | 69 const WebDocument& document = GetMainDocument(); |
| 69 if (document.isNull()) | 70 if (document.isNull()) |
| 70 return; | 71 return; |
| 71 | 72 |
| 72 bool node_has_focus; | 73 bool node_has_focus; |
| 73 bool node_is_editable_text; | 74 bool node_is_editable_text; |
| 74 // Check HasIMETextFocus first, because it will correctly handle | 75 // Check HasIMETextFocus first, because it will correctly handle |
| 75 // focus in a text box inside a ppapi plug-in. Otherwise fall back on | 76 // focus in a text box inside a ppapi plug-in. Otherwise fall back on |
| 76 // checking the focused node in Blink. | 77 // checking the focused node in Blink. |
| 77 if (render_view_->HasIMETextFocus()) { | 78 if (render_frame_->render_view()->HasIMETextFocus()) { |
| 78 node_has_focus = true; | 79 node_has_focus = true; |
| 79 node_is_editable_text = true; | 80 node_is_editable_text = true; |
| 80 } else { | 81 } else { |
| 81 node_has_focus = !node.isNull(); | 82 node_has_focus = !node.isNull(); |
| 82 node_is_editable_text = | 83 node_is_editable_text = |
| 83 node_has_focus && render_view_->IsEditableNode(node); | 84 node_has_focus && render_frame_->render_view()->IsEditableNode(node); |
| 84 } | 85 } |
| 85 | 86 |
| 86 std::vector<AccessibilityHostMsg_EventParams> events; | 87 std::vector<AccessibilityHostMsg_EventParams> events; |
| 87 events.push_back(AccessibilityHostMsg_EventParams()); | 88 events.push_back(AccessibilityHostMsg_EventParams()); |
| 88 AccessibilityHostMsg_EventParams& event = events[0]; | 89 AccessibilityHostMsg_EventParams& event = events[0]; |
| 89 | 90 |
| 90 // If we want to update the browser's accessibility tree but not send a | 91 // If we want to update the browser's accessibility tree but not send a |
| 91 // native focus changed event, we can send a LayoutComplete | 92 // native focus changed event, we can send a LayoutComplete |
| 92 // event, which doesn't post a native event on Windows. | 93 // event, which doesn't post a native event on Windows. |
| 93 event.event_type = | 94 event.event_type = |
| 94 send_focus_event ? ui::AX_EVENT_FOCUS : ui::AX_EVENT_LAYOUT_COMPLETE; | 95 send_focus_event ? ui::AX_EVENT_FOCUS : ui::AX_EVENT_LAYOUT_COMPLETE; |
| 95 | 96 |
| 96 // Set the id that the event applies to: the root node if nothing | 97 // Set the id that the event applies to: the root node if nothing |
| 97 // has focus, otherwise the focused node. | 98 // has focus, otherwise the focused node. |
| 98 event.id = node_has_focus ? next_id_ : 1; | 99 event.id = node_has_focus ? next_id_ : 1; |
| 99 | 100 |
| 100 event.update.nodes.resize(2); | 101 event.update.nodes.resize(2); |
| 101 ui::AXNodeData& root = event.update.nodes[0]; | 102 ui::AXNodeData& root = event.update.nodes[0]; |
| 102 ui::AXNodeData& child = event.update.nodes[1]; | 103 ui::AXNodeData& child = event.update.nodes[1]; |
| 103 | 104 |
| 104 // Always include the root of the tree, the document. It always has id 1. | 105 // Always include the root of the tree, the document. It always has id 1. |
| 105 root.id = 1; | 106 root.id = 1; |
| 106 root.role = ui::AX_ROLE_ROOT_WEB_AREA; | 107 root.role = ui::AX_ROLE_ROOT_WEB_AREA; |
| 107 root.state = | 108 root.state = |
| 108 (1 << ui::AX_STATE_READ_ONLY) | | 109 (1 << ui::AX_STATE_READ_ONLY) | |
| 109 (1 << ui::AX_STATE_FOCUSABLE); | 110 (1 << ui::AX_STATE_FOCUSABLE); |
| 110 if (!node_has_focus) | 111 if (!node_has_focus) |
| 111 root.state |= (1 << ui::AX_STATE_FOCUSED); | 112 root.state |= (1 << ui::AX_STATE_FOCUSED); |
| 112 root.location = gfx::Rect(render_view_->size()); | 113 root.location = gfx::Rect(render_frame_->render_view()->size()); |
| 113 root.child_ids.push_back(next_id_); | 114 root.child_ids.push_back(next_id_); |
| 114 | 115 |
| 115 child.id = next_id_; | 116 child.id = next_id_; |
| 116 child.role = ui::AX_ROLE_GROUP; | 117 child.role = ui::AX_ROLE_GROUP; |
| 117 | 118 |
| 118 if (!node.isNull() && node.isElementNode()) { | 119 if (!node.isNull() && node.isElementNode()) { |
| 119 child.location = gfx::Rect( | 120 child.location = gfx::Rect( |
| 120 const_cast<WebNode&>(node).to<WebElement>().boundsInViewportSpace()); | 121 const_cast<WebNode&>(node).to<WebElement>().boundsInViewportSpace()); |
| 121 } else if (render_view_->HasIMETextFocus()) { | 122 } else if (render_frame_->render_view()->HasIMETextFocus()) { |
| 122 child.location = root.location; | 123 child.location = root.location; |
| 123 } else { | 124 } else { |
| 124 child.location = gfx::Rect(); | 125 child.location = gfx::Rect(); |
| 125 } | 126 } |
| 126 | 127 |
| 127 if (node_has_focus) { | 128 if (node_has_focus) { |
| 128 child.state = | 129 child.state = |
| 129 (1 << ui::AX_STATE_FOCUSABLE) | | 130 (1 << ui::AX_STATE_FOCUSABLE) | |
| 130 (1 << ui::AX_STATE_FOCUSED); | 131 (1 << ui::AX_STATE_FOCUSED); |
| 131 if (!node_is_editable_text) | 132 if (!node_is_editable_text) |
| (...skipping 14 matching lines...) Expand all Loading... |
| 146 | 147 |
| 147 Send(new AccessibilityHostMsg_Events(routing_id(), events)); | 148 Send(new AccessibilityHostMsg_Events(routing_id(), events)); |
| 148 | 149 |
| 149 // Increment the id, wrap back when we get past a million. | 150 // Increment the id, wrap back when we get past a million. |
| 150 next_id_++; | 151 next_id_++; |
| 151 if (next_id_ > 1000000) | 152 if (next_id_ > 1000000) |
| 152 next_id_ = kInitialId; | 153 next_id_ = kInitialId; |
| 153 } | 154 } |
| 154 | 155 |
| 155 } // namespace content | 156 } // namespace content |
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