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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 |
| (...skipping 34 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 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); |
| (...skipping 17 matching lines...) Expand all Loading... |
| 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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