Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * 1. Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer in the |
| 11 | * documentation and/or other materials provided with the distribution. |
| 12 | * |
| 13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
Ben Murdoch | 02772c6 | 2013-07-26 10:21:05 +0100 | [diff] [blame] | 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 24 | */ |
| 25 | |
| 26 | #include "config.h" |
| 27 | #include "core/dom/PositionIterator.h" |
| 28 | |
| 29 | #include "HTMLNames.h" |
| 30 | #include "core/dom/Node.h" |
| 31 | #include "core/editing/htmlediting.h" |
Ben Murdoch | e69819b | 2013-07-17 14:56:49 +0100 | [diff] [blame] | 32 | #include "core/html/HTMLHtmlElement.h" |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 33 | #include "core/rendering/RenderBlock.h" |
| 34 | |
| 35 | namespace WebCore { |
| 36 | |
| 37 | using namespace HTMLNames; |
| 38 | |
| 39 | PositionIterator::operator Position() const |
| 40 | { |
| 41 | if (m_nodeAfterPositionInAnchor) { |
| 42 | ASSERT(m_nodeAfterPositionInAnchor->parentNode() == m_anchorNode); |
| 43 | // FIXME: This check is inadaquete because any ancestor could be ignored by editing |
| 44 | if (editingIgnoresContent(m_nodeAfterPositionInAnchor->parentNode())) |
| 45 | return positionBeforeNode(m_anchorNode); |
| 46 | return positionInParentBeforeNode(m_nodeAfterPositionInAnchor); |
| 47 | } |
| 48 | if (m_anchorNode->hasChildNodes()) |
| 49 | return lastPositionInOrAfterNode(m_anchorNode); |
| 50 | return createLegacyEditingPosition(m_anchorNode, m_offsetInAnchor); |
| 51 | } |
| 52 | |
| 53 | void PositionIterator::increment() |
| 54 | { |
| 55 | if (!m_anchorNode) |
| 56 | return; |
| 57 | |
| 58 | if (m_nodeAfterPositionInAnchor) { |
| 59 | m_anchorNode = m_nodeAfterPositionInAnchor; |
| 60 | m_nodeAfterPositionInAnchor = m_anchorNode->firstChild(); |
| 61 | m_offsetInAnchor = 0; |
| 62 | return; |
| 63 | } |
| 64 | |
| 65 | if (!m_anchorNode->hasChildNodes() && m_offsetInAnchor < lastOffsetForEditing(m_anchorNode)) |
| 66 | m_offsetInAnchor = Position::uncheckedNextOffset(m_anchorNode, m_offsetInAnchor); |
| 67 | else { |
| 68 | m_nodeAfterPositionInAnchor = m_anchorNode; |
| 69 | m_anchorNode = m_nodeAfterPositionInAnchor->parentNode(); |
| 70 | m_nodeAfterPositionInAnchor = m_nodeAfterPositionInAnchor->nextSibling(); |
| 71 | m_offsetInAnchor = 0; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | void PositionIterator::decrement() |
| 76 | { |
| 77 | if (!m_anchorNode) |
| 78 | return; |
| 79 | |
| 80 | if (m_nodeAfterPositionInAnchor) { |
| 81 | m_anchorNode = m_nodeAfterPositionInAnchor->previousSibling(); |
| 82 | if (m_anchorNode) { |
| 83 | m_nodeAfterPositionInAnchor = 0; |
| 84 | m_offsetInAnchor = m_anchorNode->hasChildNodes() ? 0 : lastOffsetForEditing(m_anchorNode); |
| 85 | } else { |
| 86 | m_nodeAfterPositionInAnchor = m_nodeAfterPositionInAnchor->parentNode(); |
| 87 | m_anchorNode = m_nodeAfterPositionInAnchor->parentNode(); |
| 88 | m_offsetInAnchor = 0; |
| 89 | } |
| 90 | return; |
| 91 | } |
Ben Murdoch | 02772c6 | 2013-07-26 10:21:05 +0100 | [diff] [blame] | 92 | |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 93 | if (m_anchorNode->hasChildNodes()) { |
| 94 | m_anchorNode = m_anchorNode->lastChild(); |
| 95 | m_offsetInAnchor = m_anchorNode->hasChildNodes()? 0: lastOffsetForEditing(m_anchorNode); |
| 96 | } else { |
| 97 | if (m_offsetInAnchor) |
| 98 | m_offsetInAnchor = Position::uncheckedPreviousOffset(m_anchorNode, m_offsetInAnchor); |
| 99 | else { |
| 100 | m_nodeAfterPositionInAnchor = m_anchorNode; |
| 101 | m_anchorNode = m_anchorNode->parentNode(); |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | bool PositionIterator::atStart() const |
| 107 | { |
| 108 | if (!m_anchorNode) |
| 109 | return true; |
| 110 | if (m_anchorNode->parentNode()) |
| 111 | return false; |
| 112 | return (!m_anchorNode->hasChildNodes() && !m_offsetInAnchor) || (m_nodeAfterPositionInAnchor && !m_nodeAfterPositionInAnchor->previousSibling()); |
| 113 | } |
| 114 | |
| 115 | bool PositionIterator::atEnd() const |
| 116 | { |
| 117 | if (!m_anchorNode) |
| 118 | return true; |
| 119 | if (m_nodeAfterPositionInAnchor) |
| 120 | return false; |
| 121 | return !m_anchorNode->parentNode() && (m_anchorNode->hasChildNodes() || m_offsetInAnchor >= lastOffsetForEditing(m_anchorNode)); |
| 122 | } |
| 123 | |
| 124 | bool PositionIterator::atStartOfNode() const |
| 125 | { |
| 126 | if (!m_anchorNode) |
| 127 | return true; |
| 128 | if (!m_nodeAfterPositionInAnchor) |
| 129 | return !m_anchorNode->hasChildNodes() && !m_offsetInAnchor; |
| 130 | return !m_nodeAfterPositionInAnchor->previousSibling(); |
| 131 | } |
| 132 | |
| 133 | bool PositionIterator::atEndOfNode() const |
| 134 | { |
| 135 | if (!m_anchorNode) |
| 136 | return true; |
| 137 | if (m_nodeAfterPositionInAnchor) |
| 138 | return false; |
| 139 | return m_anchorNode->hasChildNodes() || m_offsetInAnchor >= lastOffsetForEditing(m_anchorNode); |
| 140 | } |
| 141 | |
| 142 | bool PositionIterator::isCandidate() const |
| 143 | { |
| 144 | if (!m_anchorNode) |
| 145 | return false; |
| 146 | |
| 147 | RenderObject* renderer = m_anchorNode->renderer(); |
| 148 | if (!renderer) |
| 149 | return false; |
Ben Murdoch | 02772c6 | 2013-07-26 10:21:05 +0100 | [diff] [blame] | 150 | |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 151 | if (renderer->style()->visibility() != VISIBLE) |
| 152 | return false; |
| 153 | |
| 154 | if (renderer->isBR()) |
| 155 | return !m_offsetInAnchor && !Position::nodeIsUserSelectNone(m_anchorNode->parentNode()); |
| 156 | |
| 157 | if (renderer->isText()) |
| 158 | return !Position::nodeIsUserSelectNone(m_anchorNode) && Position(*this).inRenderedText(); |
| 159 | |
| 160 | if (isTableElement(m_anchorNode) || editingIgnoresContent(m_anchorNode)) |
| 161 | return (atStartOfNode() || atEndOfNode()) && !Position::nodeIsUserSelectNone(m_anchorNode->parentNode()); |
| 162 | |
Ben Murdoch | e69819b | 2013-07-17 14:56:49 +0100 | [diff] [blame] | 163 | if (!isHTMLHtmlElement(m_anchorNode) && renderer->isBlockFlow()) { |
Torne (Richard Coles) | 53e740f | 2013-05-09 18:38:43 +0100 | [diff] [blame] | 164 | if (toRenderBlock(renderer)->logicalHeight() || m_anchorNode->hasTagName(bodyTag)) { |
| 165 | if (!Position::hasRenderedNonAnonymousDescendantsWithHeight(renderer)) |
| 166 | return atStartOfNode() && !Position::nodeIsUserSelectNone(m_anchorNode); |
| 167 | return m_anchorNode->rendererIsEditable() && !Position::nodeIsUserSelectNone(m_anchorNode) && Position(*this).atEditingBoundary(); |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | return false; |
| 172 | } |
| 173 | |
| 174 | } // namespace WebCore |