author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 09:20:16 +0200 | |
changeset 36 | 0ed94ceaa377 |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
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// -*- c-basic-offset: 4 -*- |
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/* |
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* Copyright (C) 2006 Apple Computer, Inc. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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*/ |
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#include "config.h" |
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#include "Frame.h" |
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#include "FrameTree.h" |
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#include "Frame.h" |
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#include "Page.h" |
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#include <stdarg.h> |
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#include <wtf/Platform.h> |
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#include <wtf/Vector.h> |
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using std::swap; |
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namespace WebCore { |
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// FIXME: This belongs in some header file where multiple clients can share it. |
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#if COMPILER(MSVC) |
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int snprintf(char* str, size_t size, const char* format, ...) |
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{ |
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va_list args; |
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va_start(args, format); |
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int result = vsnprintf_s(str, size, _TRUNCATE, format, args); |
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va_end(args); |
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return result; |
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} |
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#endif |
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FrameTree::~FrameTree() |
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{ |
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for (Frame* child = firstChild(); child; child = child->tree()->nextSibling()) |
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child->setView(0); |
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} |
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void FrameTree::setName(const AtomicString& name) |
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{ |
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if (!parent()) { |
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m_name = name; |
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return; |
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} |
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m_name = AtomicString(); // Remove our old frame name so it's not considered in uniqueChildName. |
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m_name = parent()->tree()->uniqueChildName(name); |
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} |
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void FrameTree::appendChild(PassRefPtr<Frame> child) |
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{ |
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ASSERT(child->page() == m_thisFrame->page()); |
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child->tree()->m_parent = m_thisFrame; |
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Frame* oldLast = m_lastChild; |
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m_lastChild = child.get(); |
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if (oldLast) { |
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child->tree()->m_previousSibling = oldLast; |
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oldLast->tree()->m_nextSibling = child; |
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} else |
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m_firstChild = child; |
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m_childCount++; |
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ASSERT(!m_lastChild->tree()->m_nextSibling); |
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} |
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void FrameTree::removeChild(Frame* child) |
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{ |
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child->tree()->m_parent = 0; |
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child->setView(0); |
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if (child->ownerElement()) |
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child->page()->decrementFrameCount(); |
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child->pageDestroyed(); |
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// Slightly tricky way to prevent deleting the child until we are done with it, w/o |
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// extra refs. These swaps leave the child in a circular list by itself. Clearing its |
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// previous and next will then finally deref it. |
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RefPtr<Frame>& newLocationForNext = m_firstChild == child ? m_firstChild : child->tree()->m_previousSibling->tree()->m_nextSibling; |
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Frame*& newLocationForPrevious = m_lastChild == child ? m_lastChild : child->tree()->m_nextSibling->tree()->m_previousSibling; |
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swap(newLocationForNext, child->tree()->m_nextSibling); |
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// For some inexplicable reason, the following line does not compile without the explicit std:: namepsace |
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std::swap(newLocationForPrevious, child->tree()->m_previousSibling); |
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child->tree()->m_previousSibling = 0; |
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child->tree()->m_nextSibling = 0; |
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m_childCount--; |
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} |
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AtomicString FrameTree::uniqueChildName(const AtomicString& requestedName) const |
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{ |
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|
108 |
if (!requestedName.isEmpty() && !child(requestedName) && requestedName != "_blank") |
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|
109 |
return requestedName; |
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|
110 |
|
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|
111 |
// Create a repeatable name for a child about to be added to us. The name must be |
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|
112 |
// unique within the frame tree. The string we generate includes a "path" of names |
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|
113 |
// from the root frame down to us. For this path to be unique, each set of siblings must |
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|
114 |
// contribute a unique name to the path, which can't collide with any HTML-assigned names. |
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|
115 |
// We generate this path component by index in the child list along with an unlikely |
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|
116 |
// frame name that can't be set in HTML because it collides with comment syntax. |
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|
117 |
|
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118 |
const char framePathPrefix[] = "<!--framePath "; |
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119 |
const int framePathPrefixLength = 14; |
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120 |
const int framePathSuffixLength = 3; |
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|
121 |
|
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122 |
// Find the nearest parent that has a frame with a path in it. |
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|
123 |
Vector<Frame*, 16> chain; |
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124 |
Frame* frame; |
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125 |
for (frame = m_thisFrame; frame; frame = frame->tree()->parent()) { |
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126 |
if (frame->tree()->name().startsWith(framePathPrefix)) |
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127 |
break; |
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128 |
chain.append(frame); |
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129 |
} |
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130 |
String name; |
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131 |
name += framePathPrefix; |
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132 |
if (frame) |
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133 |
name += frame->tree()->name().domString().substring(framePathPrefixLength, |
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|
134 |
frame->tree()->name().length() - framePathPrefixLength - framePathSuffixLength); |
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|
135 |
for (int i = chain.size() - 1; i >= 0; --i) { |
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|
136 |
frame = chain[i]; |
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|
137 |
name += "/"; |
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|
138 |
name += frame->tree()->name(); |
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|
139 |
} |
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|
140 |
|
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|
141 |
// Suffix buffer has more than enough space for: |
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|
142 |
// 10 characters before the number |
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|
143 |
// a number (3 digits for the highest this gets in practice, 20 digits for the largest 64-bit integer) |
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|
144 |
// 6 characters after the number |
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|
145 |
// trailing null byte |
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|
146 |
// But we still use snprintf just to be extra-safe. |
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|
147 |
char suffix[40]; |
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|
148 |
snprintf(suffix, sizeof(suffix), "/<!--frame%u-->-->", childCount()); |
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|
149 |
|
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|
150 |
name += suffix; |
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|
151 |
|
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152 |
return AtomicString(name); |
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153 |
} |
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|
154 |
|
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|
155 |
Frame* FrameTree::child(unsigned index) const |
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|
156 |
{ |
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|
157 |
Frame* result = firstChild(); |
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|
158 |
for (unsigned i = 0; result && i != index; ++i) |
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|
159 |
result = result->tree()->nextSibling(); |
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|
160 |
return result; |
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|
161 |
} |
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|
162 |
|
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|
163 |
Frame* FrameTree::child(const AtomicString& name) const |
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|
164 |
{ |
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|
165 |
for (Frame* child = firstChild(); child; child = child->tree()->nextSibling()) |
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|
166 |
if (child->tree()->name() == name) |
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|
167 |
return child; |
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|
168 |
return 0; |
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|
169 |
} |
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|
170 |
|
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|
171 |
Frame* FrameTree::find(const AtomicString& name) const |
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|
172 |
{ |
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|
173 |
if (name == "_self" || name == "_current" || name.isEmpty()) |
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|
174 |
return m_thisFrame; |
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|
175 |
|
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|
176 |
if (name == "_top") |
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|
177 |
return m_thisFrame->page()->mainFrame(); |
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|
178 |
|
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|
179 |
if (name == "_parent") |
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|
180 |
return parent() ? parent() : m_thisFrame; |
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|
181 |
|
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|
182 |
// Since "_blank" should never be any frame's name, the following just amounts to an optimization. |
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|
183 |
if (name == "_blank") |
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|
184 |
return 0; |
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|
185 |
|
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|
186 |
// Search subtree starting with this frame first. |
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|
187 |
for (Frame* frame = m_thisFrame; frame; frame = frame->tree()->traverseNext(m_thisFrame)) |
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|
188 |
if (frame->tree()->name() == name) |
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|
189 |
return frame; |
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|
190 |
|
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|
191 |
// Search the entire tree for this page next. |
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|
192 |
Page* page = m_thisFrame->page(); |
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|
193 |
for (Frame* frame = page->mainFrame(); frame; frame = frame->tree()->traverseNext()) |
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|
194 |
if (frame->tree()->name() == name) |
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|
195 |
return frame; |
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|
196 |
|
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|
197 |
// Search the entire tree for all other pages in this namespace. |
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|
198 |
const HashSet<Page*>* pages = page->frameNamespace(); |
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|
199 |
if (pages) { |
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|
200 |
HashSet<Page*>::const_iterator end = pages->end(); |
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|
201 |
for (HashSet<Page*>::const_iterator it = pages->begin(); it != end; ++it) { |
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|
202 |
Page* otherPage = *it; |
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|
203 |
if (otherPage != page) |
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|
204 |
for (Frame* frame = otherPage->mainFrame(); frame; frame = frame->tree()->traverseNext()) |
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|
205 |
if (frame->tree()->name() == name) |
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|
206 |
return frame; |
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|
207 |
} |
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|
208 |
} |
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|
209 |
|
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|
210 |
return 0; |
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|
211 |
} |
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|
212 |
|
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|
213 |
bool FrameTree::isDescendantOf(const Frame* ancestor) const |
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|
214 |
{ |
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diff
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|
215 |
|
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diff
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|
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#if PLATFORM(SYMBIAN) |
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if ( !ancestor ) |
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return false; |
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#endif |
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220 |
|
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if (m_thisFrame->page() != ancestor->page()) |
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return false; |
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|
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for (Frame* frame = m_thisFrame; frame; frame = frame->tree()->parent()) |
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if (frame == ancestor) |
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return true; |
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return false; |
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} |
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|
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Frame* FrameTree::traverseNext(const Frame* stayWithin) const |
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{ |
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Frame* child = firstChild(); |
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if (child) { |
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ASSERT(!stayWithin || child->tree()->isDescendantOf(stayWithin)); |
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return child; |
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} |
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|
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if (m_thisFrame == stayWithin) |
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return 0; |
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|
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Frame* sibling = nextSibling(); |
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if (sibling) { |
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ASSERT(!stayWithin || sibling->tree()->isDescendantOf(stayWithin)); |
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return sibling; |
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} |
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246 |
|
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Frame* frame = m_thisFrame; |
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while (!sibling && (!stayWithin || frame->tree()->parent() != stayWithin)) { |
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frame = frame->tree()->parent(); |
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if (!frame) |
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251 |
return 0; |
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sibling = frame->tree()->nextSibling(); |
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} |
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254 |
|
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if (frame) { |
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ASSERT(!stayWithin || !sibling || sibling->tree()->isDescendantOf(stayWithin)); |
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return sibling; |
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} |
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259 |
|
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260 |
return 0; |
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261 |
} |
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262 |
|
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Frame* FrameTree::traverseNextWithWrap(bool wrap) const |
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{ |
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if (Frame* result = traverseNext()) |
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return result; |
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267 |
|
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if (wrap) |
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return m_thisFrame->page()->mainFrame(); |
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|
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271 |
return 0; |
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272 |
} |
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273 |
|
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274 |
Frame* FrameTree::traversePreviousWithWrap(bool wrap) const |
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275 |
{ |
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276 |
// FIXME: besides the wrap feature, this is just the traversePreviousNode algorithm |
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277 |
|
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if (Frame* prevSibling = previousSibling()) |
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return prevSibling->tree()->deepLastChild(); |
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if (Frame* parentFrame = parent()) |
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return parentFrame; |
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282 |
|
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283 |
// no siblings, no parent, self==top |
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284 |
if (wrap) |
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285 |
return deepLastChild(); |
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|
286 |
|
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287 |
// top view is always the last one in this ordering, so prev is nil without wrap |
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288 |
return 0; |
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289 |
} |
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|
290 |
|
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291 |
Frame* FrameTree::deepLastChild() const |
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292 |
{ |
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|
293 |
Frame* result = m_thisFrame; |
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for (Frame* last = lastChild(); last; last = last->tree()->lastChild()) |
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295 |
result = last; |
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|
296 |
|
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297 |
return result; |
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298 |
} |
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|
299 |
|
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300 |
Frame* FrameTree::top() const |
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301 |
{ |
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302 |
if (Page* page = m_thisFrame->page()) |
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return page->mainFrame(); |
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|
304 |
|
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|
305 |
Frame* frame = m_thisFrame; |
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306 |
while (Frame* parent = frame->tree()->parent()) |
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307 |
frame = parent; |
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308 |
return frame; |
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309 |
} |
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|
310 |
|
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|
311 |
} // namespace WebCore |