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1 /* | 1 /* |
2 * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. | 2 * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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45 #include "core/editing/iterators/TextIterator.h" | 45 #include "core/editing/iterators/TextIterator.h" |
46 #include "core/frame/LocalFrame.h" | 46 #include "core/frame/LocalFrame.h" |
47 #include "core/frame/UseCounter.h" | 47 #include "core/frame/UseCounter.h" |
48 #include "core/html/HTMLBRElement.h" | 48 #include "core/html/HTMLBRElement.h" |
49 #include "core/html/HTMLDivElement.h" | 49 #include "core/html/HTMLDivElement.h" |
50 #include "core/html/HTMLLIElement.h" | 50 #include "core/html/HTMLLIElement.h" |
51 #include "core/html/HTMLParagraphElement.h" | 51 #include "core/html/HTMLParagraphElement.h" |
52 #include "core/html/HTMLSpanElement.h" | 52 #include "core/html/HTMLSpanElement.h" |
53 #include "core/html/HTMLTableCellElement.h" | 53 #include "core/html/HTMLTableCellElement.h" |
54 #include "core/html/HTMLUListElement.h" | 54 #include "core/html/HTMLUListElement.h" |
| 55 #include "core/layout/LayoutObject.h" |
55 #include "core/layout/LayoutTableCell.h" | 56 #include "core/layout/LayoutTableCell.h" |
56 #include "core/rendering/RenderObject.h" | |
57 #include "wtf/Assertions.h" | 57 #include "wtf/Assertions.h" |
58 #include "wtf/StdLibExtras.h" | 58 #include "wtf/StdLibExtras.h" |
59 #include "wtf/text/StringBuilder.h" | 59 #include "wtf/text/StringBuilder.h" |
60 | 60 |
61 namespace blink { | 61 namespace blink { |
62 | 62 |
63 using namespace HTMLNames; | 63 using namespace HTMLNames; |
64 | 64 |
65 // Atomic means that the node has no children, or has children which are ignored
for the | 65 // Atomic means that the node has no children, or has children which are ignored
for the |
66 // purposes of editing. | 66 // purposes of editing. |
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348 bool inSameContainingBlockFlowElement(Node* a, Node* b) | 348 bool inSameContainingBlockFlowElement(Node* a, Node* b) |
349 { | 349 { |
350 return a && b && enclosingBlockFlowElement(*a) == enclosingBlockFlowElement(
*b); | 350 return a && b && enclosingBlockFlowElement(*a) == enclosingBlockFlowElement(
*b); |
351 } | 351 } |
352 | 352 |
353 TextDirection directionOfEnclosingBlock(const Position& position) | 353 TextDirection directionOfEnclosingBlock(const Position& position) |
354 { | 354 { |
355 Element* enclosingBlockElement = enclosingBlock(position.containerNode()); | 355 Element* enclosingBlockElement = enclosingBlock(position.containerNode()); |
356 if (!enclosingBlockElement) | 356 if (!enclosingBlockElement) |
357 return LTR; | 357 return LTR; |
358 RenderObject* renderer = enclosingBlockElement->renderer(); | 358 LayoutObject* renderer = enclosingBlockElement->renderer(); |
359 return renderer ? renderer->style()->direction() : LTR; | 359 return renderer ? renderer->style()->direction() : LTR; |
360 } | 360 } |
361 | 361 |
362 // This method is used to create positions in the DOM. It returns the maximum va
lid offset | 362 // This method is used to create positions in the DOM. It returns the maximum va
lid offset |
363 // in a node. It returns 1 for some elements even though they do not have childr
en, which | 363 // in a node. It returns 1 for some elements even though they do not have childr
en, which |
364 // creates technically invalid DOM Positions. Be sure to call parentAnchoredEqui
valent | 364 // creates technically invalid DOM Positions. Be sure to call parentAnchoredEqui
valent |
365 // on a Position before using it to create a DOM Range, or an exception will be
thrown. | 365 // on a Position before using it to create a DOM Range, or an exception will be
thrown. |
366 int lastOffsetForEditing(const Node* node) | 366 int lastOffsetForEditing(const Node* node) |
367 { | 367 { |
368 ASSERT(node); | 368 ASSERT(node); |
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406 } | 406 } |
407 } | 407 } |
408 | 408 |
409 ASSERT(rebalancedString.length() == length); | 409 ASSERT(rebalancedString.length() == length); |
410 | 410 |
411 return rebalancedString.toString(); | 411 return rebalancedString.toString(); |
412 } | 412 } |
413 | 413 |
414 bool isTableStructureNode(const Node *node) | 414 bool isTableStructureNode(const Node *node) |
415 { | 415 { |
416 RenderObject* renderer = node->renderer(); | 416 LayoutObject* renderer = node->renderer(); |
417 return (renderer && (renderer->isTableCell() || renderer->isTableRow() || re
nderer->isTableSection() || renderer->isLayoutTableCol())); | 417 return (renderer && (renderer->isTableCell() || renderer->isTableRow() || re
nderer->isTableSection() || renderer->isLayoutTableCol())); |
418 } | 418 } |
419 | 419 |
420 const String& nonBreakingSpaceString() | 420 const String& nonBreakingSpaceString() |
421 { | 421 { |
422 DEFINE_STATIC_LOCAL(String, nonBreakingSpaceString, (&noBreakSpace, 1)); | 422 DEFINE_STATIC_LOCAL(String, nonBreakingSpaceString, (&noBreakSpace, 1)); |
423 return nonBreakingSpaceString; | 423 return nonBreakingSpaceString; |
424 } | 424 } |
425 | 425 |
426 // FIXME: need to dump this | 426 // FIXME: need to dump this |
427 static bool isSpecialHTMLElement(const Node& n) | 427 static bool isSpecialHTMLElement(const Node& n) |
428 { | 428 { |
429 if (!n.isHTMLElement()) | 429 if (!n.isHTMLElement()) |
430 return false; | 430 return false; |
431 | 431 |
432 if (n.isLink()) | 432 if (n.isLink()) |
433 return true; | 433 return true; |
434 | 434 |
435 RenderObject* renderer = n.renderer(); | 435 LayoutObject* renderer = n.renderer(); |
436 if (!renderer) | 436 if (!renderer) |
437 return false; | 437 return false; |
438 | 438 |
439 if (renderer->style()->display() == TABLE || renderer->style()->display() ==
INLINE_TABLE) | 439 if (renderer->style()->display() == TABLE || renderer->style()->display() ==
INLINE_TABLE) |
440 return true; | 440 return true; |
441 | 441 |
442 if (renderer->style()->isFloating()) | 442 if (renderer->style()->isFloating()) |
443 return true; | 443 return true; |
444 | 444 |
445 return false; | 445 return false; |
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622 n = NodeTraversal::next(*n, node); | 622 n = NodeTraversal::next(*n, node); |
623 } | 623 } |
624 return false; | 624 return false; |
625 } | 625 } |
626 | 626 |
627 Node* highestNodeToRemoveInPruning(Node* node, Node* excludeNode) | 627 Node* highestNodeToRemoveInPruning(Node* node, Node* excludeNode) |
628 { | 628 { |
629 Node* previousNode = nullptr; | 629 Node* previousNode = nullptr; |
630 Element* rootEditableElement = node ? node->rootEditableElement() : nullptr; | 630 Element* rootEditableElement = node ? node->rootEditableElement() : nullptr; |
631 for (; node; node = node->parentNode()) { | 631 for (; node; node = node->parentNode()) { |
632 if (RenderObject* renderer = node->renderer()) { | 632 if (LayoutObject* renderer = node->renderer()) { |
633 if (!renderer->canHaveChildren() || hasARenderedDescendant(node, pre
viousNode) || rootEditableElement == node || excludeNode == node) | 633 if (!renderer->canHaveChildren() || hasARenderedDescendant(node, pre
viousNode) || rootEditableElement == node || excludeNode == node) |
634 return previousNode; | 634 return previousNode; |
635 } | 635 } |
636 previousNode = node; | 636 previousNode = node; |
637 } | 637 } |
638 return 0; | 638 return 0; |
639 } | 639 } |
640 | 640 |
641 Element* enclosingTableCell(const Position& p) | 641 Element* enclosingTableCell(const Position& p) |
642 { | 642 { |
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745 bool isRenderedHTMLTableElement(const Node* node) | 745 bool isRenderedHTMLTableElement(const Node* node) |
746 { | 746 { |
747 return isHTMLTableElement(*node) && node->renderer(); | 747 return isHTMLTableElement(*node) && node->renderer(); |
748 } | 748 } |
749 | 749 |
750 bool isRenderedTableElement(const Node* node) | 750 bool isRenderedTableElement(const Node* node) |
751 { | 751 { |
752 if (!node || !node->isElementNode()) | 752 if (!node || !node->isElementNode()) |
753 return false; | 753 return false; |
754 | 754 |
755 RenderObject* renderer = node->renderer(); | 755 LayoutObject* renderer = node->renderer(); |
756 return (renderer && renderer->isTable()); | 756 return (renderer && renderer->isTable()); |
757 } | 757 } |
758 | 758 |
759 bool isTableCell(const Node* node) | 759 bool isTableCell(const Node* node) |
760 { | 760 { |
761 ASSERT(node); | 761 ASSERT(node); |
762 RenderObject* r = node->renderer(); | 762 LayoutObject* r = node->renderer(); |
763 return r ? r->isTableCell() : isHTMLTableCellElement(*node); | 763 return r ? r->isTableCell() : isHTMLTableCellElement(*node); |
764 } | 764 } |
765 | 765 |
766 bool isEmptyTableCell(const Node* node) | 766 bool isEmptyTableCell(const Node* node) |
767 { | 767 { |
768 // Returns true IFF the passed in node is one of: | 768 // Returns true IFF the passed in node is one of: |
769 // .) a table cell with no children, | 769 // .) a table cell with no children, |
770 // .) a table cell with a single BR child, and which has no other child re
nderers, including :before and :after renderers | 770 // .) a table cell with a single BR child, and which has no other child re
nderers, including :before and :after renderers |
771 // .) the BR child of such a table cell | 771 // .) the BR child of such a table cell |
772 | 772 |
773 // Find rendered node | 773 // Find rendered node |
774 while (node && !node->renderer()) | 774 while (node && !node->renderer()) |
775 node = node->parentNode(); | 775 node = node->parentNode(); |
776 if (!node) | 776 if (!node) |
777 return false; | 777 return false; |
778 | 778 |
779 // Make sure the rendered node is a table cell or <br>. | 779 // Make sure the rendered node is a table cell or <br>. |
780 // If it's a <br>, then the parent node has to be a table cell. | 780 // If it's a <br>, then the parent node has to be a table cell. |
781 RenderObject* renderer = node->renderer(); | 781 LayoutObject* renderer = node->renderer(); |
782 if (renderer->isBR()) { | 782 if (renderer->isBR()) { |
783 renderer = renderer->parent(); | 783 renderer = renderer->parent(); |
784 if (!renderer) | 784 if (!renderer) |
785 return false; | 785 return false; |
786 } | 786 } |
787 if (!renderer->isTableCell()) | 787 if (!renderer->isTableCell()) |
788 return false; | 788 return false; |
789 | 789 |
790 // Check that the table cell contains no child renderers except for perhaps
a single <br>. | 790 // Check that the table cell contains no child renderers except for perhaps
a single <br>. |
791 RenderObject* childRenderer = toLayoutTableCell(renderer)->firstChild(); | 791 LayoutObject* childRenderer = toLayoutTableCell(renderer)->firstChild(); |
792 if (!childRenderer) | 792 if (!childRenderer) |
793 return true; | 793 return true; |
794 if (!childRenderer->isBR()) | 794 if (!childRenderer->isBR()) |
795 return false; | 795 return false; |
796 return !childRenderer->nextSibling(); | 796 return !childRenderer->nextSibling(); |
797 } | 797 } |
798 | 798 |
799 PassRefPtrWillBeRawPtr<HTMLElement> createDefaultParagraphElement(Document& docu
ment) | 799 PassRefPtrWillBeRawPtr<HTMLElement> createDefaultParagraphElement(Document& docu
ment) |
800 { | 800 { |
801 switch (document.frame()->editor().defaultParagraphSeparator()) { | 801 switch (document.frame()->editor().defaultParagraphSeparator()) { |
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875 return createTabSpanElement(document, PassRefPtrWillBeRawPtr<Text>(nullptr))
; | 875 return createTabSpanElement(document, PassRefPtrWillBeRawPtr<Text>(nullptr))
; |
876 } | 876 } |
877 | 877 |
878 PassRefPtrWillBeRawPtr<HTMLBRElement> createBlockPlaceholderElement(Document& do
cument) | 878 PassRefPtrWillBeRawPtr<HTMLBRElement> createBlockPlaceholderElement(Document& do
cument) |
879 { | 879 { |
880 return toHTMLBRElement(document.createElement(brTag, false).get()); | 880 return toHTMLBRElement(document.createElement(brTag, false).get()); |
881 } | 881 } |
882 | 882 |
883 bool isNodeRendered(const Node& node) | 883 bool isNodeRendered(const Node& node) |
884 { | 884 { |
885 RenderObject* renderer = node.renderer(); | 885 LayoutObject* renderer = node.renderer(); |
886 if (!renderer) | 886 if (!renderer) |
887 return false; | 887 return false; |
888 | 888 |
889 return renderer->style()->visibility() == VISIBLE; | 889 return renderer->style()->visibility() == VISIBLE; |
890 } | 890 } |
891 | 891 |
892 // return first preceding DOM position rendered at a different location, or "thi
s" | 892 // return first preceding DOM position rendered at a different location, or "thi
s" |
893 static Position previousCharacterPosition(const Position& position, EAffinity af
finity) | 893 static Position previousCharacterPosition(const Position& position, EAffinity af
finity) |
894 { | 894 { |
895 if (position.isNull()) | 895 if (position.isNull()) |
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1000 { | 1000 { |
1001 if (!node || !node->isHTMLElement()) | 1001 if (!node || !node->isHTMLElement()) |
1002 return false; | 1002 return false; |
1003 | 1003 |
1004 const HTMLElement& element = toHTMLElement(*node); | 1004 const HTMLElement& element = toHTMLElement(*node); |
1005 return element.hasTagName(blockquoteTag) && element.getAttribute("type") ==
"cite"; | 1005 return element.hasTagName(blockquoteTag) && element.getAttribute("type") ==
"cite"; |
1006 } | 1006 } |
1007 | 1007 |
1008 int caretMinOffset(const Node* n) | 1008 int caretMinOffset(const Node* n) |
1009 { | 1009 { |
1010 RenderObject* r = n->renderer(); | 1010 LayoutObject* r = n->renderer(); |
1011 ASSERT(!n->isCharacterDataNode() || !r || r->isText()); // FIXME: This was a
runtime check that seemingly couldn't fail; changed it to an assertion for now. | 1011 ASSERT(!n->isCharacterDataNode() || !r || r->isText()); // FIXME: This was a
runtime check that seemingly couldn't fail; changed it to an assertion for now. |
1012 return r ? r->caretMinOffset() : 0; | 1012 return r ? r->caretMinOffset() : 0; |
1013 } | 1013 } |
1014 | 1014 |
1015 // If a node can contain candidates for VisiblePositions, return the offset of t
he last candidate, otherwise | 1015 // If a node can contain candidates for VisiblePositions, return the offset of t
he last candidate, otherwise |
1016 // return the number of children for container nodes and the length for unrender
ed text nodes. | 1016 // return the number of children for container nodes and the length for unrender
ed text nodes. |
1017 int caretMaxOffset(const Node* n) | 1017 int caretMaxOffset(const Node* n) |
1018 { | 1018 { |
1019 // For rendered text nodes, return the last position that a caret could occu
py. | 1019 // For rendered text nodes, return the last position that a caret could occu
py. |
1020 if (n->isTextNode() && n->renderer()) | 1020 if (n->isTextNode() && n->renderer()) |
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1128 if (endIsVisuallySame && comparePositions(selectedRange.startPosition(), pos
itionInParentBeforeNode(node)) < 0) | 1128 if (endIsVisuallySame && comparePositions(selectedRange.startPosition(), pos
itionInParentBeforeNode(node)) < 0) |
1129 return true; | 1129 return true; |
1130 | 1130 |
1131 return startIsVisuallySame && endIsVisuallySame; | 1131 return startIsVisuallySame && endIsVisuallySame; |
1132 } | 1132 } |
1133 | 1133 |
1134 bool isRenderedAsNonInlineTableImageOrHR(const Node* node) | 1134 bool isRenderedAsNonInlineTableImageOrHR(const Node* node) |
1135 { | 1135 { |
1136 if (!node) | 1136 if (!node) |
1137 return false; | 1137 return false; |
1138 RenderObject* renderer = node->renderer(); | 1138 LayoutObject* renderer = node->renderer(); |
1139 return renderer && ((renderer->isTable() && !renderer->isInline()) || (rende
rer->isImage() && !renderer->isInline()) || renderer->isHR()); | 1139 return renderer && ((renderer->isTable() && !renderer->isInline()) || (rende
rer->isImage() && !renderer->isInline()) || renderer->isHR()); |
1140 } | 1140 } |
1141 | 1141 |
1142 bool areIdenticalElements(const Node* first, const Node* second) | 1142 bool areIdenticalElements(const Node* first, const Node* second) |
1143 { | 1143 { |
1144 if (!first->isElementNode() || !second->isElementNode()) | 1144 if (!first->isElementNode() || !second->isElementNode()) |
1145 return false; | 1145 return false; |
1146 | 1146 |
1147 const Element* firstElement = toElement(first); | 1147 const Element* firstElement = toElement(first); |
1148 const Element* secondElement = toElement(second); | 1148 const Element* secondElement = toElement(second); |
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1166 || element.hasTagName(xmpTag) | 1166 || element.hasTagName(xmpTag) |
1167 || element.hasTagName(h1Tag) | 1167 || element.hasTagName(h1Tag) |
1168 || element.hasTagName(h2Tag) | 1168 || element.hasTagName(h2Tag) |
1169 || element.hasTagName(h3Tag) | 1169 || element.hasTagName(h3Tag) |
1170 || element.hasTagName(h4Tag) | 1170 || element.hasTagName(h4Tag) |
1171 || element.hasTagName(h5Tag); | 1171 || element.hasTagName(h5Tag); |
1172 } | 1172 } |
1173 | 1173 |
1174 bool isBlockFlowElement(const Node& node) | 1174 bool isBlockFlowElement(const Node& node) |
1175 { | 1175 { |
1176 RenderObject* renderer = node.renderer(); | 1176 LayoutObject* renderer = node.renderer(); |
1177 return node.isElementNode() && renderer && renderer->isRenderBlockFlow(); | 1177 return node.isElementNode() && renderer && renderer->isRenderBlockFlow(); |
1178 } | 1178 } |
1179 | 1179 |
1180 Position adjustedSelectionStartForStyleComputation(const VisibleSelection& selec
tion) | 1180 Position adjustedSelectionStartForStyleComputation(const VisibleSelection& selec
tion) |
1181 { | 1181 { |
1182 // This function is used by range style computations to avoid bugs like: | 1182 // This function is used by range style computations to avoid bugs like: |
1183 // <rdar://problem/4017641> REGRESSION (Mail): you can only bold/unbold a se
lection starting from end of line once | 1183 // <rdar://problem/4017641> REGRESSION (Mail): you can only bold/unbold a se
lection starting from end of line once |
1184 // It is important to skip certain irrelevant content at the start of the se
lection, so we do not wind up | 1184 // It is important to skip certain irrelevant content at the start of the se
lection, so we do not wind up |
1185 // with a spurious "mixed" style. | 1185 // with a spurious "mixed" style. |
1186 | 1186 |
1187 VisiblePosition visiblePosition(selection.start()); | 1187 VisiblePosition visiblePosition(selection.start()); |
1188 if (visiblePosition.isNull()) | 1188 if (visiblePosition.isNull()) |
1189 return Position(); | 1189 return Position(); |
1190 | 1190 |
1191 // if the selection is a caret, just return the position, since the style | 1191 // if the selection is a caret, just return the position, since the style |
1192 // behind us is relevant | 1192 // behind us is relevant |
1193 if (selection.isCaret()) | 1193 if (selection.isCaret()) |
1194 return visiblePosition.deepEquivalent(); | 1194 return visiblePosition.deepEquivalent(); |
1195 | 1195 |
1196 // if the selection starts just before a paragraph break, skip over it | 1196 // if the selection starts just before a paragraph break, skip over it |
1197 if (isEndOfParagraph(visiblePosition)) | 1197 if (isEndOfParagraph(visiblePosition)) |
1198 return visiblePosition.next().deepEquivalent().downstream(); | 1198 return visiblePosition.next().deepEquivalent().downstream(); |
1199 | 1199 |
1200 // otherwise, make sure to be at the start of the first selected node, | 1200 // otherwise, make sure to be at the start of the first selected node, |
1201 // instead of possibly at the end of the last node before the selection | 1201 // instead of possibly at the end of the last node before the selection |
1202 return visiblePosition.deepEquivalent().downstream(); | 1202 return visiblePosition.deepEquivalent().downstream(); |
1203 } | 1203 } |
1204 | 1204 |
1205 } // namespace blink | 1205 } // namespace blink |
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