author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 17 Sep 2010 09:02:29 +0300 | |
changeset 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2005, 2006 Apple Computer, 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 "InsertLineBreakCommand.h" |
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|
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#include "CSSMutableStyleDeclaration.h" |
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#include "Document.h" |
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#include "Frame.h" |
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#include "HTMLElement.h" |
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#include "HTMLNames.h" |
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#include "Range.h" |
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#include "RenderObject.h" |
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#include "Text.h" |
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#include "VisiblePosition.h" |
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#include "htmlediting.h" |
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#include "visible_units.h" |
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|
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namespace WebCore { |
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|
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using namespace HTMLNames; |
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|
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InsertLineBreakCommand::InsertLineBreakCommand(Document* document) |
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: CompositeEditCommand(document) |
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{ |
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} |
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|
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bool InsertLineBreakCommand::preservesTypingStyle() const |
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{ |
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return true; |
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} |
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|
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void InsertLineBreakCommand::insertNodeAfterPosition(Node* node, const Position& pos) |
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{ |
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// Insert the BR after the caret position. In the case the |
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// position is a block, do an append. We don't want to insert |
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// the BR *after* the block. |
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Element* cb = pos.node()->enclosingBlockFlowElement(); |
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if (cb == pos.node()) |
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appendNode(node, cb); |
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else |
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insertNodeAfter(node, pos.node()); |
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} |
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|
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void InsertLineBreakCommand::insertNodeBeforePosition(Node* node, const Position& pos) |
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{ |
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// Insert the BR after the caret position. In the case the |
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// position is a block, do an append. We don't want to insert |
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// the BR *before* the block. |
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Element* cb = pos.node()->enclosingBlockFlowElement(); |
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if (cb == pos.node()) |
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appendNode(node, cb); |
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else |
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insertNodeBefore(node, pos.node()); |
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} |
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|
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// Whether we should insert a break element or a '\n'. |
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bool InsertLineBreakCommand::shouldUseBreakElement(const Position& insertionPos) |
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{ |
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// An editing position like [input, 0] actually refers to the position before |
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// the input element, and in that case we need to check the input element's |
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// parent's renderer. |
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Position p(rangeCompliantEquivalent(insertionPos)); |
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return p.node()->renderer() && !p.node()->renderer()->style()->preserveNewline(); |
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} |
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|
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void InsertLineBreakCommand::doApply() |
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{ |
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deleteSelection(); |
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VisibleSelection selection = endingSelection(); |
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if (selection.isNone()) |
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return; |
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|
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VisiblePosition caret(selection.visibleStart()); |
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// FIXME: If the node is hidden, we should still be able to insert text. |
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// For now, we return to avoid a crash. https://bugs.webkit.org/show_bug.cgi?id=40342 |
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if (caret.isNull()) |
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return; |
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|
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Position pos(caret.deepEquivalent()); |
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103 |
|
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104 |
pos = positionAvoidingSpecialElementBoundary(pos); |
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|
105 |
|
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106 |
pos = positionOutsideTabSpan(pos); |
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|
107 |
|
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108 |
RefPtr<Node> nodeToInsert; |
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109 |
if (shouldUseBreakElement(pos)) |
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nodeToInsert = createBreakElement(document()); |
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111 |
else |
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112 |
nodeToInsert = document()->createTextNode("\n"); |
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113 |
|
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114 |
// FIXME: Need to merge text nodes when inserting just after or before text. |
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115 |
|
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116 |
if (isEndOfParagraph(caret) && !lineBreakExistsAtVisiblePosition(caret)) { |
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117 |
bool needExtraLineBreak = !pos.node()->hasTagName(hrTag) && !pos.node()->hasTagName(tableTag); |
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118 |
|
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119 |
insertNodeAt(nodeToInsert.get(), pos); |
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|
120 |
|
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121 |
if (needExtraLineBreak) |
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122 |
insertNodeBefore(nodeToInsert->cloneNode(false), nodeToInsert); |
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123 |
|
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124 |
VisiblePosition endingPosition(Position(nodeToInsert.get(), 0)); |
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125 |
setEndingSelection(VisibleSelection(endingPosition)); |
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126 |
} else if (pos.deprecatedEditingOffset() <= caretMinOffset(pos.node())) { |
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127 |
insertNodeAt(nodeToInsert.get(), pos); |
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|
128 |
|
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129 |
// Insert an extra br or '\n' if the just inserted one collapsed. |
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130 |
if (!isStartOfParagraph(VisiblePosition(Position(nodeToInsert.get(), 0)))) |
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131 |
insertNodeBefore(nodeToInsert->cloneNode(false).get(), nodeToInsert.get()); |
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|
132 |
|
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133 |
setEndingSelection(VisibleSelection(positionInParentAfterNode(nodeToInsert.get()), DOWNSTREAM)); |
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134 |
// If we're inserting after all of the rendered text in a text node, or into a non-text node, |
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135 |
// a simple insertion is sufficient. |
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136 |
} else if (pos.deprecatedEditingOffset() >= caretMaxOffset(pos.node()) || !pos.node()->isTextNode()) { |
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137 |
insertNodeAt(nodeToInsert.get(), pos); |
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|
138 |
setEndingSelection(VisibleSelection(positionInParentAfterNode(nodeToInsert.get()), DOWNSTREAM)); |
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139 |
} else if (pos.node()->isTextNode()) { |
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140 |
// Split a text node |
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141 |
Text* textNode = static_cast<Text*>(pos.node()); |
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142 |
splitTextNode(textNode, pos.deprecatedEditingOffset()); |
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143 |
insertNodeBefore(nodeToInsert, textNode); |
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144 |
Position endingPosition = Position(textNode, 0); |
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|
145 |
|
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146 |
// Handle whitespace that occurs after the split |
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147 |
updateLayout(); |
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|
148 |
if (!endingPosition.isRenderedCharacter()) { |
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149 |
Position positionBeforeTextNode(positionInParentBeforeNode(textNode)); |
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150 |
// Clear out all whitespace and insert one non-breaking space |
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|
151 |
deleteInsignificantTextDownstream(endingPosition); |
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|
152 |
ASSERT(!textNode->renderer() || textNode->renderer()->style()->collapseWhiteSpace()); |
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153 |
// Deleting insignificant whitespace will remove textNode if it contains nothing but insignificant whitespace. |
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|
154 |
if (textNode->inDocument()) |
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|
155 |
insertTextIntoNode(textNode, 0, nonBreakingSpaceString()); |
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|
156 |
else { |
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|
157 |
RefPtr<Text> nbspNode = document()->createTextNode(nonBreakingSpaceString()); |
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|
158 |
insertNodeAt(nbspNode.get(), positionBeforeTextNode); |
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|
159 |
endingPosition = Position(nbspNode.get(), 0); |
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|
160 |
} |
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|
161 |
} |
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|
162 |
|
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|
163 |
setEndingSelection(VisibleSelection(endingPosition, DOWNSTREAM)); |
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|
164 |
} |
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|
165 |
|
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|
166 |
// Handle the case where there is a typing style. |
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|
167 |
|
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|
168 |
CSSMutableStyleDeclaration* typingStyle = document()->frame()->typingStyle(); |
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|
169 |
|
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|
170 |
if (typingStyle && typingStyle->length() > 0) { |
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|
171 |
// Apply the typing style to the inserted line break, so that if the selection |
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|
172 |
// leaves and then comes back, new input will have the right style. |
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|
173 |
// FIXME: We shouldn't always apply the typing style to the line break here, |
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|
174 |
// see <rdar://problem/5794462>. |
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|
175 |
applyStyle(typingStyle, firstDeepEditingPositionForNode(nodeToInsert.get()), lastDeepEditingPositionForNode(nodeToInsert.get())); |
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|
176 |
// Even though this applyStyle operates on a Range, it still sets an endingSelection(). |
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|
177 |
// It tries to set a VisibleSelection around the content it operated on. So, that VisibleSelection |
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|
178 |
// will either (a) select the line break we inserted, or it will (b) be a caret just |
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|
179 |
// before the line break (if the line break is at the end of a block it isn't selectable). |
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|
180 |
// So, this next call sets the endingSelection() to a caret just after the line break |
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|
181 |
// that we inserted, or just before it if it's at the end of a block. |
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|
182 |
setEndingSelection(endingSelection().visibleEnd()); |
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|
183 |
} |
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|
184 |
|
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|
185 |
rebalanceWhitespace(); |
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|
186 |
} |
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|
187 |
|
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|
188 |
} |