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27 #include "InsertTextCommand.h"
31 #include "EditingText.h"
34 #include "HTMLInterchange.h"
35 #include "htmlediting.h"
36 #include "visible_units.h"
37 #include <wtf/unicode/CharacterNames.h>
41 InsertTextCommand::InsertTextCommand(Document* document, const String& text, bool selectInsertedText, RebalanceType rebalanceType)
42 : CompositeEditCommand(document)
44 , m_selectInsertedText(selectInsertedText)
45 , m_rebalanceType(rebalanceType)
49 InsertTextCommand::InsertTextCommand(Document* document, const String& text, PassRefPtr<TextInsertionMarkerSupplier> markerSupplier)
50 : CompositeEditCommand(document)
52 , m_selectInsertedText(false)
53 , m_rebalanceType(RebalanceLeadingAndTrailingWhitespaces)
54 , m_markerSupplier(markerSupplier)
58 Position InsertTextCommand::positionInsideTextNode(const Position& p)
61 if (isTabSpanTextNode(pos.anchorNode())) {
62 RefPtr<Node> textNode = document()->createEditingTextNode("");
63 insertNodeAtTabSpanPosition(textNode.get(), pos);
64 return firstPositionInNode(textNode.get());
67 // Prepare for text input by looking at the specified position.
68 // It may be necessary to insert a text node to receive characters.
69 if (!pos.containerNode()->isTextNode()) {
70 RefPtr<Node> textNode = document()->createEditingTextNode("");
71 insertNodeAt(textNode.get(), pos);
72 return firstPositionInNode(textNode.get());
78 // This avoids the expense of a full fledged delete operation, and avoids a layout that typically results
80 bool InsertTextCommand::performTrivialReplace(const String& text, bool selectInsertedText)
82 if (!endingSelection().isRange())
85 if (text.contains('\t') || text.contains(' ') || text.contains('\n'))
88 Position start = endingSelection().start();
89 Position endPosition = replaceSelectedTextInNode(text);
90 if (endPosition.isNull())
93 // We could have inserted a part of composed character sequence,
94 // so we are basically treating ending selection as a range to avoid validation.
95 // <http://bugs.webkit.org/show_bug.cgi?id=15781>
96 VisibleSelection forcedEndingSelection;
97 forcedEndingSelection.setWithoutValidation(start, endPosition);
98 forcedEndingSelection.setIsDirectional(endingSelection().isDirectional());
99 setEndingSelection(forcedEndingSelection);
101 if (!selectInsertedText)
102 setEndingSelection(VisibleSelection(endingSelection().visibleEnd(), endingSelection().isDirectional()));
107 void InsertTextCommand::doApply()
109 ASSERT(m_text.find('\n') == notFound);
111 if (!endingSelection().isNonOrphanedCaretOrRange())
114 // Delete the current selection.
115 // FIXME: This delete operation blows away the typing style.
116 if (endingSelection().isRange()) {
117 if (performTrivialReplace(m_text, m_selectInsertedText))
119 deleteSelection(false, true, true, false, false);
120 // deleteSelection eventually makes a new endingSelection out of a Position. If that Position doesn't have
121 // a renderer (e.g. it is on a <frameset> in the DOM), the VisibleSelection cannot be canonicalized to
122 // anything other than NoSelection. The rest of this function requires a real endingSelection, so bail out.
123 if (endingSelection().isNone())
127 Position startPosition(endingSelection().start());
129 Position placeholder;
130 // We want to remove preserved newlines and brs that will collapse (and thus become unnecessary) when content
131 // is inserted just before them.
132 // FIXME: We shouldn't really have to do this, but removing placeholders is a workaround for 9661.
133 // If the caret is just before a placeholder, downstream will normalize the caret to it.
134 Position downstream(startPosition.downstream());
135 if (lineBreakExistsAtPosition(downstream)) {
136 // FIXME: This doesn't handle placeholders at the end of anonymous blocks.
137 VisiblePosition caret(startPosition);
138 if (isEndOfBlock(caret) && isStartOfParagraph(caret))
139 placeholder = downstream;
140 // Don't remove the placeholder yet, otherwise the block we're inserting into would collapse before
141 // we get a chance to insert into it. We check for a placeholder now, though, because doing so requires
142 // the creation of a VisiblePosition, and if we did that post-insertion it would force a layout.
145 // Insert the character at the leftmost candidate.
146 startPosition = startPosition.upstream();
148 // It is possible for the node that contains startPosition to contain only unrendered whitespace,
149 // and so deleteInsignificantText could remove it. Save the position before the node in case that happens.
150 Position positionBeforeStartNode(positionInParentBeforeNode(startPosition.containerNode()));
151 deleteInsignificantText(startPosition.upstream(), startPosition.downstream());
152 if (!startPosition.anchorNode()->inDocument())
153 startPosition = positionBeforeStartNode;
154 if (!startPosition.isCandidate())
155 startPosition = startPosition.downstream();
157 startPosition = positionAvoidingSpecialElementBoundary(startPosition);
159 Position endPosition;
161 if (m_text == "\t") {
162 endPosition = insertTab(startPosition);
163 startPosition = endPosition.previous();
164 if (placeholder.isNotNull())
165 removePlaceholderAt(placeholder);
167 // Make sure the document is set up to receive m_text
168 startPosition = positionInsideTextNode(startPosition);
169 ASSERT(startPosition.anchorType() == Position::PositionIsOffsetInAnchor);
170 ASSERT(startPosition.containerNode());
171 ASSERT(startPosition.containerNode()->isTextNode());
172 if (placeholder.isNotNull())
173 removePlaceholderAt(placeholder);
174 RefPtr<Text> textNode = startPosition.containerText();
175 const unsigned offset = startPosition.offsetInContainerNode();
177 insertTextIntoNode(textNode, offset, m_text);
178 endPosition = Position(textNode, offset + m_text.length());
179 if (m_markerSupplier)
180 m_markerSupplier->addMarkersToTextNode(textNode.get(), offset, m_text);
182 if (m_rebalanceType == RebalanceLeadingAndTrailingWhitespaces) {
183 // The insertion may require adjusting adjacent whitespace, if it is present.
184 rebalanceWhitespaceAt(endPosition);
185 // Rebalancing on both sides isn't necessary if we've inserted only spaces.
186 if (!shouldRebalanceLeadingWhitespaceFor(m_text))
187 rebalanceWhitespaceAt(startPosition);
189 ASSERT(m_rebalanceType == RebalanceAllWhitespaces);
190 if (canRebalance(startPosition) && canRebalance(endPosition))
191 rebalanceWhitespaceOnTextSubstring(textNode, startPosition.offsetInContainerNode(), endPosition.offsetInContainerNode());
195 // We could have inserted a part of composed character sequence,
196 // so we are basically treating ending selection as a range to avoid validation.
197 // <http://bugs.webkit.org/show_bug.cgi?id=15781>
198 VisibleSelection forcedEndingSelection;
199 forcedEndingSelection.setWithoutValidation(startPosition, endPosition);
200 forcedEndingSelection.setIsDirectional(endingSelection().isDirectional());
201 setEndingSelection(forcedEndingSelection);
203 // Handle the case where there is a typing style.
204 if (RefPtr<EditingStyle> typingStyle = document()->frame()->selection()->typingStyle()) {
205 typingStyle->prepareToApplyAt(endPosition, EditingStyle::PreserveWritingDirection);
206 if (!typingStyle->isEmpty())
207 applyStyle(typingStyle.get());
210 if (!m_selectInsertedText)
211 setEndingSelection(VisibleSelection(endingSelection().end(), endingSelection().affinity(), endingSelection().isDirectional()));
214 Position InsertTextCommand::insertTab(const Position& pos)
216 Position insertPos = VisiblePosition(pos, DOWNSTREAM).deepEquivalent();
218 Node* node = insertPos.containerNode();
219 unsigned int offset = node->isTextNode() ? insertPos.offsetInContainerNode() : 0;
221 // keep tabs coalesced in tab span
222 if (isTabSpanTextNode(node)) {
223 RefPtr<Text> textNode = toText(node);
224 insertTextIntoNode(textNode, offset, "\t");
225 return Position(textNode.release(), offset + 1);
228 // create new tab span
229 RefPtr<Element> spanNode = createTabSpanElement(document());
232 if (!node->isTextNode()) {
233 insertNodeAt(spanNode.get(), insertPos);
235 RefPtr<Text> textNode = toText(node);
236 if (offset >= textNode->length())
237 insertNodeAfter(spanNode, textNode.release());
239 // split node to make room for the span
240 // NOTE: splitTextNode uses textNode for the
241 // second node in the split, so we need to
242 // insert the span before it.
244 splitTextNode(textNode, offset);
245 insertNodeBefore(spanNode, textNode.release());
249 // return the position following the new tab
250 return lastPositionInNode(spanNode.get());