1 /* 2 * Copyright (C) 2004 Apple Computer, 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 COMPUTER, 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 COMPUTER, 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 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef __dom_position_h__ 27 #define __dom_position_h__ 28 29 #include <QDebug> 30 31 namespace DOM 32 { 33 34 class ElementImpl; 35 class NodeImpl; 36 37 NodeImpl *rootNavigableElement(NodeImpl *node); 38 bool inSameRootNavigableElement(NodeImpl *n1, NodeImpl *n2); 39 40 void printEnclosingBlockTree(NodeImpl *node); 41 void printRootEditableTree(NodeImpl *node); 42 43 class Position 44 { 45 public: Position()46 Position() : m_node(nullptr), m_offset(0) {} 47 Position(NodeImpl *node, long offset); 48 Position(const Position &); 49 ~Position(); 50 node()51 NodeImpl *node() const 52 { 53 return m_node; 54 } offset()55 long offset() const 56 { 57 return m_offset; 58 } 59 60 ElementImpl *element() const; 61 62 long renderedOffset() const; 63 isEmpty()64 bool isEmpty() const 65 { 66 return m_node == nullptr; 67 } notEmpty()68 bool notEmpty() const 69 { 70 return m_node != nullptr; 71 } 72 73 Position equivalentLeafPosition() const; 74 Position previousRenderedEditablePosition() const; 75 Position nextRenderedEditablePosition() const; 76 Position previousCharacterPosition() const; 77 Position nextCharacterPosition() const; 78 Position previousWordPosition() const; 79 Position nextWordPosition() const; 80 Position previousLinePosition(int x) const; 81 Position nextLinePosition(int x) const; 82 Position equivalentUpstreamPosition() const; 83 Position equivalentDownstreamPosition() const; 84 Position equivalentRangeCompliantPosition() const; 85 Position equivalentShallowPosition() const; 86 bool atStartOfContainingEditableBlock() const; 87 bool atStartOfRootEditableElement() const; 88 bool inRenderedContent() const; 89 bool inRenderedText() const; 90 bool rendersOnSameLine(const Position &pos) const; 91 bool rendersInDifferentPosition(const Position &pos) const; 92 bool isFirstRenderedPositionOnLine() const; 93 bool isLastRenderedPositionOnLine() const; 94 bool isLastRenderedPositionInEditableBlock() const; 95 bool inFirstEditableInRootEditableElement() const; 96 bool inLastEditableInRootEditableElement() const; 97 bool inFirstEditableInContainingEditableBlock() const; 98 bool inLastEditableInContainingEditableBlock() const; 99 100 Position &operator=(const Position &o); 101 102 friend bool operator==(const Position &a, const Position &b); 103 friend bool operator!=(const Position &a, const Position &b); 104 105 private: 106 NodeImpl *m_node; 107 long m_offset; 108 }; 109 110 inline bool operator==(const Position &a, const Position &b) 111 { 112 return a.node() == b.node() && a.offset() == b.offset(); 113 } 114 115 inline bool operator!=(const Position &a, const Position &b) 116 { 117 return !(a == b); 118 } 119 120 QDebug operator<<(QDebug stream, const Position &position); 121 122 } // namespace DOM 123 124 #endif // __dom_position_h__ 125