author | Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com> |
Mon, 30 Mar 2009 12:54:55 +0300 | |
changeset 0 | dd21522fd290 |
child 37 | cb62a4f66ebe |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2006, 2007 Apple Inc. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "config.h" |
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#include "FocusController.h" |
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#include "AXObjectCache.h" |
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#include "Chrome.h" |
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#include "Document.h" |
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#include "Editor.h" |
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#include "EditorClient.h" |
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#include "Element.h" |
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#include "Event.h" |
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#include "EventHandler.h" |
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#include "EventNames.h" |
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#include "Frame.h" |
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#include "FrameView.h" |
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#include "FrameTree.h" |
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#include "HTMLFrameOwnerElement.h" |
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#include "HTMLNames.h" |
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#include "KeyboardEvent.h" |
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#include "Page.h" |
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#include "Range.h" |
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#include "RenderObject.h" |
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#include "RenderWidget.h" |
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#include "SelectionController.h" |
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#include "Widget.h" |
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#include <wtf/Platform.h> |
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|
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namespace WebCore { |
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using namespace EventNames; |
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using namespace HTMLNames; |
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FocusController::FocusController(Page* page) |
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: m_page(page) |
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{ |
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} |
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void FocusController::setFocusedFrame(PassRefPtr<Frame> frame) |
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{ |
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if (m_focusedFrame == frame) |
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return; |
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|
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if (m_focusedFrame) { |
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m_focusedFrame->setWindowHasFocus(false); |
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m_focusedFrame->setIsActive(false); |
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} |
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|
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m_focusedFrame = frame; |
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|
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if (m_focusedFrame) { |
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m_focusedFrame->setWindowHasFocus(true); |
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m_focusedFrame->setIsActive(true); |
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} |
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} |
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|
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Frame* FocusController::focusedOrMainFrame() |
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{ |
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if (Frame* frame = focusedFrame()) |
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return frame; |
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return m_page->mainFrame(); |
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} |
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|
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static Node* deepFocusableNode(FocusDirection direction, Node* node, KeyboardEvent* event) |
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{ |
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// The node we found might be a HTMLFrameOwnerElement, so descend down the frame tree until we find either: |
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// 1) a focusable node, or |
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// 2) the deepest-nested HTMLFrameOwnerElement |
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while (node && node->isFrameOwnerElement()) { |
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HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(node); |
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if (!owner->contentFrame()) |
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break; |
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|
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Document* document = owner->contentFrame()->document(); |
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if (!document) |
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break; |
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|
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node = (direction == FocusDirectionForward) |
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? document->nextFocusableNode(0, event) |
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: document->previousFocusableNode(0, event); |
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if (!node) { |
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node = owner; |
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break; |
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} |
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} |
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|
109 |
|
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|
110 |
return node; |
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|
111 |
} |
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|
112 |
|
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|
113 |
bool FocusController::setInitialFocus(FocusDirection direction, KeyboardEvent* event) |
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|
114 |
{ |
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|
115 |
return advanceFocus(direction, event, true); |
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|
116 |
} |
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|
117 |
|
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|
118 |
bool FocusController::advanceFocus(KeyboardEvent* event) |
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|
119 |
{ |
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|
120 |
return advanceFocus((event && event->shiftKey()) ? FocusDirectionBackward : FocusDirectionForward, event); |
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121 |
} |
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|
122 |
|
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|
123 |
bool FocusController::advanceFocus(FocusDirection direction, KeyboardEvent* event, bool initialFocus) |
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|
124 |
{ |
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|
125 |
Frame* frame = focusedOrMainFrame(); |
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|
126 |
ASSERT(frame); |
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|
127 |
Document* document = frame->document(); |
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|
128 |
if (!document) |
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|
129 |
return false; |
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|
130 |
|
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131 |
Node* node = (direction == FocusDirectionForward) |
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132 |
? document->nextFocusableNode(document->focusedNode(), event) |
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|
133 |
: document->previousFocusableNode(document->focusedNode(), event); |
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|
134 |
|
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|
135 |
// If there's no focusable node to advance to, move up the frame tree until we find one. |
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|
136 |
while (!node && frame) { |
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|
137 |
Frame* parentFrame = frame->tree()->parent(); |
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|
138 |
if (!parentFrame) |
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|
139 |
break; |
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|
140 |
|
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|
141 |
Document* parentDocument = parentFrame->document(); |
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|
142 |
if (!parentDocument) |
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|
143 |
break; |
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|
144 |
|
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|
145 |
HTMLFrameOwnerElement* owner = frame->ownerElement(); |
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|
146 |
if (!owner) |
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|
147 |
break; |
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|
148 |
|
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|
149 |
node = (direction == FocusDirectionForward) |
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|
150 |
? parentDocument->nextFocusableNode(owner, event) |
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|
151 |
: parentDocument->previousFocusableNode(owner, event); |
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|
152 |
|
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|
153 |
frame = parentFrame; |
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|
154 |
} |
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|
155 |
|
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|
156 |
node = deepFocusableNode(direction, node, event); |
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|
157 |
|
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|
158 |
if (!node) { |
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Revision: 200911
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parents:
diff
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|
159 |
// We didn't find a node to focus, so we should try to pass focus to Chrome. |
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|
160 |
if (!initialFocus && m_page->chrome()->canTakeFocus(direction)) { |
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|
161 |
document->setFocusedNode(0); |
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|
162 |
setFocusedFrame(0); |
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|
163 |
m_page->chrome()->takeFocus(direction); |
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|
164 |
return true; |
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|
165 |
} |
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parents:
diff
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|
166 |
|
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parents:
diff
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|
167 |
// Chrome doesn't want focus, so we should wrap focus. |
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parents:
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|
168 |
if (Document* d = m_page->mainFrame()->document()) |
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|
169 |
node = (direction == FocusDirectionForward) |
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|
170 |
? d->nextFocusableNode(0, event) |
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|
171 |
: d->previousFocusableNode(0, event); |
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parents:
diff
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|
172 |
|
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parents:
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|
173 |
node = deepFocusableNode(direction, node, event); |
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|
174 |
|
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|
175 |
if (!node) |
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|
176 |
return false; |
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|
177 |
} |
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parents:
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|
178 |
|
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parents:
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|
179 |
ASSERT(node); |
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parents:
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|
180 |
|
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parents:
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|
181 |
if (node == document->focusedNode()) |
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Revision: 200911
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parents:
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|
182 |
// Focus wrapped around to the same node. |
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Revision: 200911
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diff
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|
183 |
return true; |
dd21522fd290
Revision: 200911
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parents:
diff
changeset
|
184 |
|
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Revision: 200911
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parents:
diff
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|
185 |
if (!node->isElementNode()) |
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Revision: 200911
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parents:
diff
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|
186 |
// FIXME: May need a way to focus a document here. |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
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|
187 |
return false; |
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Revision: 200911
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parents:
diff
changeset
|
188 |
|
dd21522fd290
Revision: 200911
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parents:
diff
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|
189 |
if (node->isFrameOwnerElement()) { |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
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|
190 |
// We focus frames rather than frame owners. |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
191 |
// FIXME: We should not focus frames that have no scrollbars, as focusing them isn't useful to the user. |
dd21522fd290
Revision: 200911
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parents:
diff
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|
192 |
HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(node); |
dd21522fd290
Revision: 200911
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parents:
diff
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|
193 |
if (!owner->contentFrame()) |
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Revision: 200911
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parents:
diff
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|
194 |
return false; |
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Revision: 200911
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parents:
diff
changeset
|
195 |
|
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Revision: 200911
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parents:
diff
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|
196 |
document->setFocusedNode(0); |
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Revision: 200911
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parents:
diff
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|
197 |
setFocusedFrame(owner->contentFrame()); |
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Revision: 200911
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parents:
diff
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|
198 |
return true; |
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Revision: 200911
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parents:
diff
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|
199 |
} |
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Revision: 200911
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parents:
diff
changeset
|
200 |
|
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Revision: 200911
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parents:
diff
changeset
|
201 |
// FIXME: It would be nice to just be able to call setFocusedNode(node) here, but we can't do |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
202 |
// that because some elements (e.g. HTMLInputElement and HTMLTextAreaElement) do extra work in |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
203 |
// their focus() methods. |
dd21522fd290
Revision: 200911
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parents:
diff
changeset
|
204 |
|
dd21522fd290
Revision: 200911
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parents:
diff
changeset
|
205 |
Document* newDocument = node->document(); |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
206 |
|
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
207 |
if (newDocument != document) |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
208 |
// Focus is going away from this document, so clear the focused node. |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
209 |
document->setFocusedNode(0); |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
210 |
|
dd21522fd290
Revision: 200911
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parents:
diff
changeset
|
211 |
if (newDocument) |
dd21522fd290
Revision: 200911
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parents:
diff
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|
212 |
setFocusedFrame(newDocument->frame()); |
dd21522fd290
Revision: 200911
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parents:
diff
changeset
|
213 |
|
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Revision: 200911
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parents:
diff
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|
214 |
static_cast<Element*>(node)->focus(false); |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
215 |
return true; |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
changeset
|
216 |
} |
dd21522fd290
Revision: 200911
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parents:
diff
changeset
|
217 |
|
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
parents:
diff
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|
218 |
static bool relinquishesEditingFocus(Node *node) |
dd21522fd290
Revision: 200911
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parents:
diff
changeset
|
219 |
{ |
dd21522fd290
Revision: 200911
Kiiskinen Klaus (Nokia-D-MSW/Tampere) <klaus.kiiskinen@nokia.com>
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ASSERT(node); |
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ASSERT(node->isContentEditable()); |
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|
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Node* root = node->rootEditableElement(); |
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Frame* frame = node->document()->frame(); |
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if (!frame || !root) |
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return false; |
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227 |
|
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return frame->editor()->shouldEndEditing(rangeOfContents(root).get()); |
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} |
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230 |
|
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static void clearSelectionIfNeeded(Frame* oldFocusedFrame, Frame* newFocusedFrame, Node* newFocusedNode) |
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{ |
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if (!oldFocusedFrame || !newFocusedFrame) |
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return; |
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235 |
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if (oldFocusedFrame->document() != newFocusedFrame->document()) |
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return; |
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238 |
|
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SelectionController* s = oldFocusedFrame->selectionController(); |
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if (s->isNone()) |
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return; |
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242 |
|
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Node* selectionStartNode = s->selection().start().node(); |
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if (selectionStartNode == newFocusedNode || selectionStartNode->isDescendantOf(newFocusedNode) || selectionStartNode->shadowAncestorNode() == newFocusedNode) |
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return; |
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246 |
|
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if (Node* mousePressNode = newFocusedFrame->eventHandler()->mousePressNode()) |
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if (mousePressNode->renderer() && !mousePressNode->canStartSelection()) |
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if (Node* root = s->rootEditableElement()) |
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if (Node* shadowAncestorNode = root->shadowAncestorNode()) |
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// Don't do this for textareas and text fields, when they lose focus their selections should be cleared |
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// and then restored when they regain focus, to match other browsers. |
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if (!shadowAncestorNode->hasTagName(inputTag) && !shadowAncestorNode->hasTagName(textareaTag)) |
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return; |
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255 |
|
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s->clear(); |
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} |
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258 |
|
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bool FocusController::setFocusedNode(Node* node, PassRefPtr<Frame> newFocusedFrame) |
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{ |
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RefPtr<Frame> oldFocusedFrame = focusedFrame(); |
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RefPtr<Document> oldDocument = oldFocusedFrame ? oldFocusedFrame->document() : 0; |
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263 |
|
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Node* oldFocusedNode = oldDocument ? oldDocument->focusedNode() : 0; |
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if (oldFocusedNode == node) |
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return true; |
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267 |
|
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if (oldFocusedNode && oldFocusedNode->rootEditableElement() == oldFocusedNode && !relinquishesEditingFocus(oldFocusedNode)) |
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269 |
return false; |
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270 |
|
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clearSelectionIfNeeded(oldFocusedFrame.get(), newFocusedFrame.get(), node); |
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272 |
|
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if (!node) { |
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if (oldDocument) |
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oldDocument->setFocusedNode(0); |
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m_page->editorClient()->setInputMethodState(false); |
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return true; |
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} |
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279 |
|
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RefPtr<Document> newDocument = node ? node->document() : 0; |
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281 |
|
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if (newDocument && newDocument->focusedNode() == node) { |
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m_page->editorClient()->setInputMethodState(node->shouldUseInputMethod()); |
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284 |
return true; |
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285 |
} |
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286 |
|
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if (oldDocument && oldDocument != newDocument) |
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oldDocument->setFocusedNode(0); |
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|
289 |
|
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setFocusedFrame(newFocusedFrame); |
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|
291 |
|
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if (newDocument) |
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newDocument->setFocusedNode(node); |
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|
294 |
|
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m_page->editorClient()->setInputMethodState(node->shouldUseInputMethod()); |
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296 |
|
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297 |
return true; |
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298 |
} |
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|
299 |
|
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300 |
} // namespace WebCore |