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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtGui module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include <private/qtools_p.h> |
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43 #include <qdebug.h> |
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44 |
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45 #include "qtextdocument_p.h" |
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46 #include "qtextdocument.h" |
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47 #include <qtextformat.h> |
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48 #include "qtextformat_p.h" |
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49 #include "qtextobject_p.h" |
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50 #include "qtextcursor.h" |
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51 #include "qtextimagehandler_p.h" |
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52 #include "qtextcursor_p.h" |
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53 #include "qtextdocumentlayout_p.h" |
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54 #include "qtexttable.h" |
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55 #include "qtextengine_p.h" |
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56 |
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57 #include <stdlib.h> |
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58 |
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59 QT_BEGIN_NAMESPACE |
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60 |
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61 #define PMDEBUG if(0) qDebug |
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62 |
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63 // The VxWorks DIAB compiler crashes when initializing the anonymouse union with { a7 } |
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64 #if !defined(Q_CC_DIAB) |
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65 # define QT_INIT_TEXTUNDOCOMMAND(c, a1, a2, a3, a4, a5, a6, a7, a8) \ |
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66 QTextUndoCommand c = { a1, a2, 0, 0, a3, a4, a5, a6, { a7 }, a8 } |
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67 #else |
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68 # define QT_INIT_TEXTUNDOCOMMAND(c, a1, a2, a3, a4, a5, a6, a7, a8) \ |
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69 QTextUndoCommand c = { a1, a2, 0, 0, a3, a4, a5, a6 }; c.blockFormat = a7; c.revision = a8 |
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70 #endif |
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71 |
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72 /* |
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73 Structure of a document: |
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74 |
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75 DOCUMENT :== FRAME_CONTENTS |
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76 FRAME :== START_OF_FRAME FRAME_CONTENTS END_OF_FRAME |
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77 FRAME_CONTENTS = LIST_OF_BLOCKS ((FRAME | TABLE) LIST_OF_BLOCKS)* |
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78 TABLE :== (START_OF_FRAME TABLE_CELL)+ END_OF_FRAME |
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79 TABLE_CELL = FRAME_CONTENTS |
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80 LIST_OF_BLOCKS :== (BLOCK END_OF_PARA)* BLOCK |
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81 BLOCK :== (FRAGMENT)* |
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82 FRAGMENT :== String of characters |
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83 |
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84 END_OF_PARA :== 0x2029 # Paragraph separator in Unicode |
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85 START_OF_FRAME :== 0xfdd0 |
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86 END_OF_FRAME := 0xfdd1 |
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87 |
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88 Note also that LIST_OF_BLOCKS can be empty. Nevertheless, there is |
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89 at least one valid cursor position there where you could start |
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90 typing. The block format is in this case determined by the last |
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91 END_OF_PARA/START_OF_FRAME/END_OF_FRAME (see below). |
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92 |
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93 Lists are not in here, as they are treated specially. A list is just |
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94 a collection of (not neccessarily connected) blocks, that share the |
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95 same objectIndex() in the format that refers to the list format and |
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96 object. |
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97 |
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98 The above does not clearly note where formats are. Here's |
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99 how it looks currently: |
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100 |
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101 FRAGMENT: one charFormat associated |
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102 |
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103 END_OF_PARA: one charFormat, and a blockFormat for the _next_ block. |
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104 |
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105 START_OF_FRAME: one char format, and a blockFormat (for the next |
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106 block). The format associated with the objectIndex() of the |
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107 charFormat decides whether this is a frame or table and its |
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108 properties |
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109 |
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110 END_OF_FRAME: one charFormat and a blockFormat (for the next |
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111 block). The object() of the charFormat is the same as for the |
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112 corresponding START_OF_BLOCK. |
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113 |
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114 |
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115 The document is independent of the layout with certain restrictions: |
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116 |
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117 * Cursor movement (esp. up and down) depend on the layout. |
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118 * You cannot have more than one layout, as the layout data of QTextObjects |
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119 is stored in the text object itself. |
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120 |
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121 */ |
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122 |
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123 void QTextBlockData::invalidate() const |
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124 { |
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125 if (layout) |
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126 layout->engine()->invalidate(); |
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127 } |
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128 |
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129 static bool isValidBlockSeparator(const QChar &ch) |
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130 { |
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131 return ch == QChar::ParagraphSeparator |
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132 || ch == QTextBeginningOfFrame |
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133 || ch == QTextEndOfFrame; |
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134 } |
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135 |
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136 #ifndef QT_NO_DEBUG |
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137 static bool noBlockInString(const QString &str) |
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138 { |
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139 return !str.contains(QChar::ParagraphSeparator) |
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140 && !str.contains(QTextBeginningOfFrame) |
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141 && !str.contains(QTextEndOfFrame); |
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142 } |
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143 #endif |
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144 |
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145 bool QTextUndoCommand::tryMerge(const QTextUndoCommand &other) |
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146 { |
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147 if (command != other.command) |
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148 return false; |
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149 |
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150 if (command == Inserted |
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151 && (pos + length == other.pos) |
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152 && (strPos + length == other.strPos) |
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153 && format == other.format) { |
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154 |
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155 length += other.length; |
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156 return true; |
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157 } |
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158 |
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159 // removal to the 'right' using 'Delete' key |
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160 if (command == Removed |
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161 && pos == other.pos |
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162 && (strPos + length == other.strPos) |
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163 && format == other.format) { |
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164 |
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165 length += other.length; |
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166 return true; |
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167 } |
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168 |
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169 // removal to the 'left' using 'Backspace' |
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170 if (command == Removed |
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171 && (other.pos + other.length == pos) |
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172 && (other.strPos + other.length == strPos) |
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173 && (format == other.format)) { |
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174 |
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175 int l = length; |
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176 (*this) = other; |
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177 |
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178 length += l; |
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179 return true; |
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180 } |
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181 |
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182 return false; |
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183 } |
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184 |
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185 QTextDocumentPrivate::QTextDocumentPrivate() |
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186 : wasUndoAvailable(false), |
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187 wasRedoAvailable(false), |
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188 docChangeOldLength(0), |
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189 docChangeLength(0), |
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190 framesDirty(true), |
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191 rtFrame(0), |
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192 initialBlockCharFormatIndex(-1) // set correctly later in init() |
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193 { |
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194 editBlock = 0; |
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195 docChangeFrom = -1; |
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196 |
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197 undoState = 0; |
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198 revision = -1; // init() inserts a block, bringing it to 0 |
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199 |
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200 lout = 0; |
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201 |
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202 modified = false; |
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203 modifiedState = 0; |
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204 |
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205 undoEnabled = true; |
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206 inContentsChange = false; |
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207 |
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208 defaultTextOption.setTabStop(80); // same as in qtextengine.cpp |
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209 defaultTextOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere); |
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210 |
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211 indentWidth = 40; |
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212 documentMargin = 4; |
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213 |
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214 maximumBlockCount = 0; |
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215 needsEnsureMaximumBlockCount = false; |
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216 unreachableCharacterCount = 0; |
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217 lastBlockCount = 0; |
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218 } |
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219 |
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220 void QTextDocumentPrivate::init() |
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221 { |
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222 framesDirty = false; |
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223 |
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224 bool undoState = undoEnabled; |
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225 undoEnabled = false; |
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226 initialBlockCharFormatIndex = formats.indexForFormat(QTextCharFormat()); |
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227 insertBlock(0, formats.indexForFormat(QTextBlockFormat()), formats.indexForFormat(QTextCharFormat())); |
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228 undoEnabled = undoState; |
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229 modified = false; |
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230 modifiedState = 0; |
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231 } |
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232 |
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233 void QTextDocumentPrivate::clear() |
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234 { |
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235 Q_Q(QTextDocument); |
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236 for (int i = 0; i < cursors.count(); ++i) { |
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237 cursors.at(i)->setPosition(0); |
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238 cursors.at(i)->currentCharFormat = -1; |
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239 cursors.at(i)->anchor = 0; |
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240 cursors.at(i)->adjusted_anchor = 0; |
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241 } |
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242 |
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243 QList<QTextCursorPrivate *>oldCursors = cursors; |
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244 QT_TRY{ |
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245 cursors.clear(); |
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246 changedCursors.clear(); |
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247 |
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248 QMap<int, QTextObject *>::Iterator objectIt = objects.begin(); |
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249 while (objectIt != objects.end()) { |
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250 if (*objectIt != rtFrame) { |
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251 delete *objectIt; |
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252 objectIt = objects.erase(objectIt); |
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253 } else { |
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254 ++objectIt; |
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255 } |
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256 } |
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257 // also clear out the remaining root frame pointer |
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258 // (we're going to delete the object further down) |
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259 objects.clear(); |
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260 |
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261 title.clear(); |
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262 undoState = 0; |
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263 truncateUndoStack(); |
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264 text = QString(); |
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265 unreachableCharacterCount = 0; |
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266 modifiedState = 0; |
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267 modified = false; |
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268 formats = QTextFormatCollection(); |
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269 int len = fragments.length(); |
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270 fragments.clear(); |
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271 blocks.clear(); |
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272 cachedResources.clear(); |
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273 delete rtFrame; |
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274 rtFrame = 0; |
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275 init(); |
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276 cursors = oldCursors; |
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277 inContentsChange = true; |
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278 q->contentsChange(0, len, 0); |
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279 inContentsChange = false; |
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280 if (lout) |
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281 lout->documentChanged(0, len, 0); |
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282 } QT_CATCH(...) { |
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283 cursors = oldCursors; // at least recover the cursors |
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284 QT_RETHROW; |
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285 } |
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286 } |
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287 |
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288 QTextDocumentPrivate::~QTextDocumentPrivate() |
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289 { |
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290 for (int i = 0; i < cursors.count(); ++i) |
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291 cursors.at(i)->priv = 0; |
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292 cursors.clear(); |
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293 undoState = 0; |
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294 undoEnabled = true; |
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295 truncateUndoStack(); |
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296 } |
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297 |
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298 void QTextDocumentPrivate::setLayout(QAbstractTextDocumentLayout *layout) |
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299 { |
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300 Q_Q(QTextDocument); |
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301 if (lout == layout) |
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302 return; |
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303 const bool firstLayout = !lout; |
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304 delete lout; |
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305 lout = layout; |
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306 |
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307 if (!firstLayout) |
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308 for (BlockMap::Iterator it = blocks.begin(); !it.atEnd(); ++it) |
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309 it->free(); |
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310 |
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311 emit q->documentLayoutChanged(); |
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312 inContentsChange = true; |
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313 emit q->contentsChange(0, 0, length()); |
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314 inContentsChange = false; |
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315 if (lout) |
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316 lout->documentChanged(0, 0, length()); |
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317 } |
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318 |
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319 |
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320 void QTextDocumentPrivate::insert_string(int pos, uint strPos, uint length, int format, QTextUndoCommand::Operation op) |
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321 { |
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322 // ##### optimise when only appending to the fragment! |
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323 Q_ASSERT(noBlockInString(text.mid(strPos, length))); |
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324 |
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325 split(pos); |
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326 uint x = fragments.insert_single(pos, length); |
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327 QTextFragmentData *X = fragments.fragment(x); |
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328 X->format = format; |
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329 X->stringPosition = strPos; |
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330 uint w = fragments.previous(x); |
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331 if (w) |
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332 unite(w); |
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333 |
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334 int b = blocks.findNode(pos); |
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335 blocks.setSize(b, blocks.size(b)+length); |
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336 |
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337 Q_ASSERT(blocks.length() == fragments.length()); |
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338 |
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339 QTextFrame *frame = qobject_cast<QTextFrame *>(objectForFormat(format)); |
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340 if (frame) { |
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341 frame->d_func()->fragmentAdded(text.at(strPos), x); |
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342 framesDirty = true; |
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343 } |
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344 |
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345 adjustDocumentChangesAndCursors(pos, length, op); |
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346 } |
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347 |
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348 int QTextDocumentPrivate::insert_block(int pos, uint strPos, int format, int blockFormat, QTextUndoCommand::Operation op, int command) |
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349 { |
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350 split(pos); |
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351 uint x = fragments.insert_single(pos, 1); |
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352 QTextFragmentData *X = fragments.fragment(x); |
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353 X->format = format; |
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354 X->stringPosition = strPos; |
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355 // no need trying to unite, since paragraph separators are always in a fragment of their own |
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356 |
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357 Q_ASSERT(isValidBlockSeparator(text.at(strPos))); |
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358 Q_ASSERT(blocks.length()+1 == fragments.length()); |
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359 |
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360 int block_pos = pos; |
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361 if (blocks.length() && command == QTextUndoCommand::BlockRemoved) |
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362 ++block_pos; |
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363 int size = 1; |
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364 int n = blocks.findNode(block_pos); |
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365 int key = n ? blocks.position(n) : blocks.length(); |
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366 |
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367 Q_ASSERT(n || (!n && block_pos == blocks.length())); |
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368 if (key != block_pos) { |
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369 Q_ASSERT(key < block_pos); |
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370 int oldSize = blocks.size(n); |
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371 blocks.setSize(n, block_pos-key); |
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372 size += oldSize - (block_pos-key); |
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373 } |
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374 int b = blocks.insert_single(block_pos, size); |
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375 QTextBlockData *B = blocks.fragment(b); |
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376 B->format = blockFormat; |
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377 |
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378 Q_ASSERT(blocks.length() == fragments.length()); |
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379 |
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380 QTextBlockGroup *group = qobject_cast<QTextBlockGroup *>(objectForFormat(blockFormat)); |
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381 if (group) |
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382 group->blockInserted(QTextBlock(this, b)); |
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383 |
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384 QTextFrame *frame = qobject_cast<QTextFrame *>(objectForFormat(formats.format(format))); |
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385 if (frame) { |
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386 frame->d_func()->fragmentAdded(text.at(strPos), x); |
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387 framesDirty = true; |
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388 } |
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389 |
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390 adjustDocumentChangesAndCursors(pos, 1, op); |
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391 return x; |
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392 } |
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393 |
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394 int QTextDocumentPrivate::insertBlock(const QChar &blockSeparator, |
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395 int pos, int blockFormat, int charFormat, QTextUndoCommand::Operation op) |
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396 { |
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397 Q_ASSERT(formats.format(blockFormat).isBlockFormat()); |
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398 Q_ASSERT(formats.format(charFormat).isCharFormat()); |
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399 Q_ASSERT(pos >= 0 && (pos < fragments.length() || (pos == 0 && fragments.length() == 0))); |
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400 Q_ASSERT(isValidBlockSeparator(blockSeparator)); |
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401 |
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402 beginEditBlock(); |
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403 |
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404 int strPos = text.length(); |
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405 text.append(blockSeparator); |
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406 |
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407 int ob = blocks.findNode(pos); |
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408 bool atBlockEnd = true; |
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409 bool atBlockStart = true; |
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410 int oldRevision = 0; |
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411 if (ob) { |
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412 atBlockEnd = (pos - blocks.position(ob) == blocks.size(ob)-1); |
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413 atBlockStart = ((int)blocks.position(ob) == pos); |
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414 oldRevision = blocks.fragment(ob)->revision; |
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415 } |
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416 |
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417 const int fragment = insert_block(pos, strPos, charFormat, blockFormat, op, QTextUndoCommand::BlockRemoved); |
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418 |
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419 Q_ASSERT(blocks.length() == fragments.length()); |
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420 |
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421 int b = blocks.findNode(pos); |
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422 QTextBlockData *B = blocks.fragment(b); |
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423 |
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424 QT_INIT_TEXTUNDOCOMMAND(c, QTextUndoCommand::BlockInserted, (editBlock != 0), |
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425 op, charFormat, strPos, pos, blockFormat, |
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426 B->revision); |
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427 |
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428 appendUndoItem(c); |
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429 Q_ASSERT(undoState == undoStack.size()); |
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430 |
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431 // update revision numbers of the modified blocks. |
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432 B->revision = (atBlockEnd && !atBlockStart)? oldRevision : revision; |
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433 b = blocks.next(b); |
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434 if (b) { |
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435 B = blocks.fragment(b); |
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436 B->revision = atBlockStart ? oldRevision : revision; |
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437 } |
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438 |
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439 if (formats.charFormat(charFormat).objectIndex() == -1) |
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440 needsEnsureMaximumBlockCount = true; |
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441 |
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442 endEditBlock(); |
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443 return fragment; |
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444 } |
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445 |
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446 int QTextDocumentPrivate::insertBlock(int pos, int blockFormat, int charFormat, QTextUndoCommand::Operation op) |
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447 { |
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448 return insertBlock(QChar::ParagraphSeparator, pos, blockFormat, charFormat, op); |
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449 } |
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450 |
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451 void QTextDocumentPrivate::insert(int pos, int strPos, int strLength, int format) |
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452 { |
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453 if (strLength <= 0) |
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454 return; |
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455 |
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456 Q_ASSERT(pos >= 0 && pos < fragments.length()); |
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457 Q_ASSERT(formats.format(format).isCharFormat()); |
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458 |
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459 insert_string(pos, strPos, strLength, format, QTextUndoCommand::MoveCursor); |
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460 if (undoEnabled) { |
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461 int b = blocks.findNode(pos); |
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462 QTextBlockData *B = blocks.fragment(b); |
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463 |
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464 QT_INIT_TEXTUNDOCOMMAND(c, QTextUndoCommand::Inserted, (editBlock != 0), |
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465 QTextUndoCommand::MoveCursor, format, strPos, pos, strLength, |
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466 B->revision); |
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467 appendUndoItem(c); |
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468 B->revision = revision; |
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469 Q_ASSERT(undoState == undoStack.size()); |
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470 } |
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471 finishEdit(); |
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472 } |
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473 |
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474 void QTextDocumentPrivate::insert(int pos, const QString &str, int format) |
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475 { |
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476 if (str.size() == 0) |
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477 return; |
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478 |
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479 Q_ASSERT(noBlockInString(str)); |
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480 |
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481 int strPos = text.length(); |
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482 text.append(str); |
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483 insert(pos, strPos, str.length(), format); |
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484 } |
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485 |
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486 int QTextDocumentPrivate::remove_string(int pos, uint length, QTextUndoCommand::Operation op) |
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487 { |
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488 Q_ASSERT(pos >= 0); |
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489 Q_ASSERT(blocks.length() == fragments.length()); |
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490 Q_ASSERT(blocks.length() >= pos+(int)length); |
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491 |
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492 int b = blocks.findNode(pos); |
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493 uint x = fragments.findNode(pos); |
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494 |
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495 Q_ASSERT(blocks.size(b) > length); |
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496 Q_ASSERT(x && fragments.position(x) == (uint)pos && fragments.size(x) == length); |
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497 Q_ASSERT(noBlockInString(text.mid(fragments.fragment(x)->stringPosition, length))); |
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498 |
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499 blocks.setSize(b, blocks.size(b)-length); |
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500 |
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501 QTextFrame *frame = qobject_cast<QTextFrame *>(objectForFormat(fragments.fragment(x)->format)); |
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502 if (frame) { |
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503 frame->d_func()->fragmentRemoved(text.at(fragments.fragment(x)->stringPosition), x); |
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504 framesDirty = true; |
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505 } |
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506 |
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507 const int w = fragments.erase_single(x); |
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508 |
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509 if (!undoEnabled) |
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510 unreachableCharacterCount += length; |
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511 |
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512 adjustDocumentChangesAndCursors(pos, -int(length), op); |
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513 |
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514 return w; |
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515 } |
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516 |
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517 int QTextDocumentPrivate::remove_block(int pos, int *blockFormat, int command, QTextUndoCommand::Operation op) |
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518 { |
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519 Q_ASSERT(pos >= 0); |
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520 Q_ASSERT(blocks.length() == fragments.length()); |
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521 Q_ASSERT(blocks.length() > pos); |
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522 |
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523 int b = blocks.findNode(pos); |
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524 uint x = fragments.findNode(pos); |
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525 |
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526 Q_ASSERT(x && (int)fragments.position(x) == pos); |
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527 Q_ASSERT(fragments.size(x) == 1); |
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528 Q_ASSERT(isValidBlockSeparator(text.at(fragments.fragment(x)->stringPosition))); |
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529 Q_ASSERT(b); |
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530 |
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531 if (blocks.size(b) == 1 && command == QTextUndoCommand::BlockAdded) { |
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532 Q_ASSERT((int)blocks.position(b) == pos); |
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533 // qDebug("removing empty block"); |
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534 // empty block remove the block itself |
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535 } else { |
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536 // non empty block, merge with next one into this block |
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537 // qDebug("merging block with next"); |
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538 int n = blocks.next(b); |
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539 Q_ASSERT((int)blocks.position(n) == pos + 1); |
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540 blocks.setSize(b, blocks.size(b) + blocks.size(n) - 1); |
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541 b = n; |
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542 } |
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543 *blockFormat = blocks.fragment(b)->format; |
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544 |
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545 QTextBlockGroup *group = qobject_cast<QTextBlockGroup *>(objectForFormat(blocks.fragment(b)->format)); |
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546 if (group) |
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547 group->blockRemoved(QTextBlock(this, b)); |
|
548 |
|
549 QTextFrame *frame = qobject_cast<QTextFrame *>(objectForFormat(fragments.fragment(x)->format)); |
|
550 if (frame) { |
|
551 frame->d_func()->fragmentRemoved(text.at(fragments.fragment(x)->stringPosition), x); |
|
552 framesDirty = true; |
|
553 } |
|
554 |
|
555 blocks.erase_single(b); |
|
556 const int w = fragments.erase_single(x); |
|
557 |
|
558 adjustDocumentChangesAndCursors(pos, -1, op); |
|
559 |
|
560 return w; |
|
561 } |
|
562 |
|
563 #if !defined(QT_NO_DEBUG) |
|
564 static bool isAncestorFrame(QTextFrame *possibleAncestor, QTextFrame *child) |
|
565 { |
|
566 while (child) { |
|
567 if (child == possibleAncestor) |
|
568 return true; |
|
569 child = child->parentFrame(); |
|
570 } |
|
571 return false; |
|
572 } |
|
573 #endif |
|
574 |
|
575 void QTextDocumentPrivate::move(int pos, int to, int length, QTextUndoCommand::Operation op) |
|
576 { |
|
577 Q_ASSERT(to <= fragments.length() && to <= pos); |
|
578 Q_ASSERT(pos >= 0 && pos+length <= fragments.length()); |
|
579 Q_ASSERT(blocks.length() == fragments.length()); |
|
580 |
|
581 if (pos == to) |
|
582 return; |
|
583 |
|
584 const bool needsInsert = to != -1; |
|
585 |
|
586 #if !defined(QT_NO_DEBUG) |
|
587 const bool startAndEndInSameFrame = (frameAt(pos) == frameAt(pos + length - 1)); |
|
588 |
|
589 const bool endIsEndOfChildFrame = (isAncestorFrame(frameAt(pos), frameAt(pos + length - 1)) |
|
590 && text.at(find(pos + length - 1)->stringPosition) == QTextEndOfFrame); |
|
591 |
|
592 const bool startIsStartOfFrameAndEndIsEndOfFrameWithCommonParent |
|
593 = (text.at(find(pos)->stringPosition) == QTextBeginningOfFrame |
|
594 && text.at(find(pos + length - 1)->stringPosition) == QTextEndOfFrame |
|
595 && frameAt(pos)->parentFrame() == frameAt(pos + length - 1)->parentFrame()); |
|
596 |
|
597 const bool isFirstTableCell = (qobject_cast<QTextTable *>(frameAt(pos + length - 1)) |
|
598 && frameAt(pos + length - 1)->parentFrame() == frameAt(pos)); |
|
599 |
|
600 Q_ASSERT(startAndEndInSameFrame || endIsEndOfChildFrame || startIsStartOfFrameAndEndIsEndOfFrameWithCommonParent || isFirstTableCell); |
|
601 #endif |
|
602 |
|
603 split(pos); |
|
604 split(pos+length); |
|
605 |
|
606 uint dst = needsInsert ? fragments.findNode(to) : 0; |
|
607 uint dstKey = needsInsert ? fragments.position(dst) : 0; |
|
608 |
|
609 uint x = fragments.findNode(pos); |
|
610 uint end = fragments.findNode(pos+length); |
|
611 |
|
612 uint w = 0; |
|
613 while (x != end) { |
|
614 uint n = fragments.next(x); |
|
615 |
|
616 uint key = fragments.position(x); |
|
617 uint b = blocks.findNode(key+1); |
|
618 QTextBlockData *B = blocks.fragment(b); |
|
619 int blockRevision = B->revision; |
|
620 |
|
621 QTextFragmentData *X = fragments.fragment(x); |
|
622 QT_INIT_TEXTUNDOCOMMAND(c, QTextUndoCommand::Removed, (editBlock != 0), |
|
623 op, X->format, X->stringPosition, key, X->size_array[0], |
|
624 blockRevision); |
|
625 QT_INIT_TEXTUNDOCOMMAND(cInsert, QTextUndoCommand::Inserted, (editBlock != 0), |
|
626 op, X->format, X->stringPosition, dstKey, X->size_array[0], |
|
627 blockRevision); |
|
628 |
|
629 if (key+1 != blocks.position(b)) { |
|
630 // qDebug("remove_string from %d length %d", key, X->size_array[0]); |
|
631 Q_ASSERT(noBlockInString(text.mid(X->stringPosition, X->size_array[0]))); |
|
632 w = remove_string(key, X->size_array[0], op); |
|
633 |
|
634 if (needsInsert) { |
|
635 insert_string(dstKey, X->stringPosition, X->size_array[0], X->format, op); |
|
636 dstKey += X->size_array[0]; |
|
637 } |
|
638 } else { |
|
639 // qDebug("remove_block at %d", key); |
|
640 Q_ASSERT(X->size_array[0] == 1 && isValidBlockSeparator(text.at(X->stringPosition))); |
|
641 b = blocks.previous(b); |
|
642 B = 0; |
|
643 c.command = blocks.size(b) == 1 ? QTextUndoCommand::BlockDeleted : QTextUndoCommand::BlockRemoved; |
|
644 w = remove_block(key, &c.blockFormat, QTextUndoCommand::BlockAdded, op); |
|
645 |
|
646 if (needsInsert) { |
|
647 insert_block(dstKey++, X->stringPosition, X->format, c.blockFormat, op, QTextUndoCommand::BlockRemoved); |
|
648 cInsert.command = blocks.size(b) == 1 ? QTextUndoCommand::BlockAdded : QTextUndoCommand::BlockInserted; |
|
649 cInsert.blockFormat = c.blockFormat; |
|
650 } |
|
651 } |
|
652 appendUndoItem(c); |
|
653 if (B) |
|
654 B->revision = revision; |
|
655 x = n; |
|
656 |
|
657 if (needsInsert) |
|
658 appendUndoItem(cInsert); |
|
659 } |
|
660 if (w) |
|
661 unite(w); |
|
662 |
|
663 Q_ASSERT(blocks.length() == fragments.length()); |
|
664 |
|
665 finishEdit(); |
|
666 } |
|
667 |
|
668 void QTextDocumentPrivate::remove(int pos, int length, QTextUndoCommand::Operation op) |
|
669 { |
|
670 if (length == 0) |
|
671 return; |
|
672 move(pos, -1, length, op); |
|
673 } |
|
674 |
|
675 void QTextDocumentPrivate::setCharFormat(int pos, int length, const QTextCharFormat &newFormat, FormatChangeMode mode) |
|
676 { |
|
677 beginEditBlock(); |
|
678 |
|
679 Q_ASSERT(newFormat.isValid()); |
|
680 |
|
681 int newFormatIdx = -1; |
|
682 if (mode == SetFormatAndPreserveObjectIndices) { |
|
683 QTextCharFormat cleanFormat = newFormat; |
|
684 cleanFormat.clearProperty(QTextFormat::ObjectIndex); |
|
685 newFormatIdx = formats.indexForFormat(cleanFormat); |
|
686 } else if (mode == SetFormat) { |
|
687 newFormatIdx = formats.indexForFormat(newFormat); |
|
688 } |
|
689 |
|
690 if (pos == -1) { |
|
691 if (mode == MergeFormat) { |
|
692 QTextFormat format = formats.format(initialBlockCharFormatIndex); |
|
693 format.merge(newFormat); |
|
694 initialBlockCharFormatIndex = formats.indexForFormat(format); |
|
695 } else if (mode == SetFormatAndPreserveObjectIndices |
|
696 && formats.format(initialBlockCharFormatIndex).objectIndex() != -1) { |
|
697 QTextCharFormat f = newFormat; |
|
698 f.setObjectIndex(formats.format(initialBlockCharFormatIndex).objectIndex()); |
|
699 initialBlockCharFormatIndex = formats.indexForFormat(f); |
|
700 } else { |
|
701 initialBlockCharFormatIndex = newFormatIdx; |
|
702 } |
|
703 |
|
704 ++pos; |
|
705 --length; |
|
706 } |
|
707 |
|
708 const int startPos = pos; |
|
709 const int endPos = pos + length; |
|
710 |
|
711 split(startPos); |
|
712 split(endPos); |
|
713 |
|
714 while (pos < endPos) { |
|
715 FragmentMap::Iterator it = fragments.find(pos); |
|
716 Q_ASSERT(!it.atEnd()); |
|
717 |
|
718 QTextFragmentData *fragment = it.value(); |
|
719 |
|
720 Q_ASSERT(formats.format(fragment->format).type() == QTextFormat::CharFormat); |
|
721 |
|
722 int offset = pos - it.position(); |
|
723 int length = qMin(endPos - pos, int(fragment->size_array[0] - offset)); |
|
724 int oldFormat = fragment->format; |
|
725 |
|
726 if (mode == MergeFormat) { |
|
727 QTextFormat format = formats.format(fragment->format); |
|
728 format.merge(newFormat); |
|
729 fragment->format = formats.indexForFormat(format); |
|
730 } else if (mode == SetFormatAndPreserveObjectIndices |
|
731 && formats.format(oldFormat).objectIndex() != -1) { |
|
732 QTextCharFormat f = newFormat; |
|
733 f.setObjectIndex(formats.format(oldFormat).objectIndex()); |
|
734 fragment->format = formats.indexForFormat(f); |
|
735 } else { |
|
736 fragment->format = newFormatIdx; |
|
737 } |
|
738 |
|
739 QT_INIT_TEXTUNDOCOMMAND(c, QTextUndoCommand::CharFormatChanged, true, QTextUndoCommand::MoveCursor, oldFormat, |
|
740 0, pos, length, 0); |
|
741 appendUndoItem(c); |
|
742 |
|
743 pos += length; |
|
744 Q_ASSERT(pos == (int)(it.position() + fragment->size_array[0]) || pos >= endPos); |
|
745 } |
|
746 |
|
747 int n = fragments.findNode(startPos - 1); |
|
748 if (n) |
|
749 unite(n); |
|
750 |
|
751 n = fragments.findNode(endPos); |
|
752 if (n) |
|
753 unite(n); |
|
754 |
|
755 QTextBlock blockIt = blocksFind(startPos); |
|
756 QTextBlock endIt = blocksFind(endPos); |
|
757 if (endIt.isValid()) |
|
758 endIt = endIt.next(); |
|
759 for (; blockIt.isValid() && blockIt != endIt; blockIt = blockIt.next()) |
|
760 QTextDocumentPrivate::block(blockIt)->invalidate(); |
|
761 |
|
762 documentChange(startPos, length); |
|
763 |
|
764 endEditBlock(); |
|
765 } |
|
766 |
|
767 void QTextDocumentPrivate::setBlockFormat(const QTextBlock &from, const QTextBlock &to, |
|
768 const QTextBlockFormat &newFormat, FormatChangeMode mode) |
|
769 { |
|
770 beginEditBlock(); |
|
771 |
|
772 Q_ASSERT(mode != SetFormatAndPreserveObjectIndices); // only implemented for setCharFormat |
|
773 |
|
774 Q_ASSERT(newFormat.isValid()); |
|
775 |
|
776 int newFormatIdx = -1; |
|
777 if (mode == SetFormat) |
|
778 newFormatIdx = formats.indexForFormat(newFormat); |
|
779 QTextBlockGroup *group = qobject_cast<QTextBlockGroup *>(objectForFormat(newFormat)); |
|
780 |
|
781 QTextBlock it = from; |
|
782 QTextBlock end = to; |
|
783 if (end.isValid()) |
|
784 end = end.next(); |
|
785 |
|
786 for (; it != end; it = it.next()) { |
|
787 int oldFormat = block(it)->format; |
|
788 QTextBlockFormat format = formats.blockFormat(oldFormat); |
|
789 QTextBlockGroup *oldGroup = qobject_cast<QTextBlockGroup *>(objectForFormat(format)); |
|
790 if (mode == MergeFormat) { |
|
791 format.merge(newFormat); |
|
792 newFormatIdx = formats.indexForFormat(format); |
|
793 group = qobject_cast<QTextBlockGroup *>(objectForFormat(format)); |
|
794 } |
|
795 block(it)->format = newFormatIdx; |
|
796 |
|
797 block(it)->invalidate(); |
|
798 |
|
799 QT_INIT_TEXTUNDOCOMMAND(c, QTextUndoCommand::BlockFormatChanged, true, QTextUndoCommand::MoveCursor, oldFormat, |
|
800 0, it.position(), 1, 0); |
|
801 appendUndoItem(c); |
|
802 |
|
803 if (group != oldGroup) { |
|
804 if (oldGroup) |
|
805 oldGroup->blockRemoved(it); |
|
806 if (group) |
|
807 group->blockInserted(it); |
|
808 } else if (group) { |
|
809 group->blockFormatChanged(it); |
|
810 } |
|
811 } |
|
812 |
|
813 documentChange(from.position(), to.position() + to.length() - from.position()); |
|
814 |
|
815 endEditBlock(); |
|
816 } |
|
817 |
|
818 |
|
819 bool QTextDocumentPrivate::split(int pos) |
|
820 { |
|
821 uint x = fragments.findNode(pos); |
|
822 if (x) { |
|
823 int k = fragments.position(x); |
|
824 // qDebug("found fragment with key %d, size_left=%d, size=%d to split at %d", |
|
825 // k, (*it)->size_left[0], (*it)->size_array[0], pos); |
|
826 if (k != pos) { |
|
827 Q_ASSERT(k <= pos); |
|
828 // need to resize the first fragment and add a new one |
|
829 QTextFragmentData *X = fragments.fragment(x); |
|
830 int oldsize = X->size_array[0]; |
|
831 fragments.setSize(x, pos-k); |
|
832 uint n = fragments.insert_single(pos, oldsize-(pos-k)); |
|
833 X = fragments.fragment(x); |
|
834 QTextFragmentData *N = fragments.fragment(n); |
|
835 N->stringPosition = X->stringPosition + pos-k; |
|
836 N->format = X->format; |
|
837 return true; |
|
838 } |
|
839 } |
|
840 return false; |
|
841 } |
|
842 |
|
843 bool QTextDocumentPrivate::unite(uint f) |
|
844 { |
|
845 uint n = fragments.next(f); |
|
846 if (!n) |
|
847 return false; |
|
848 |
|
849 QTextFragmentData *ff = fragments.fragment(f); |
|
850 QTextFragmentData *nf = fragments.fragment(n); |
|
851 |
|
852 if (nf->format == ff->format && (ff->stringPosition + (int)ff->size_array[0] == nf->stringPosition)) { |
|
853 if (isValidBlockSeparator(text.at(ff->stringPosition)) |
|
854 || isValidBlockSeparator(text.at(nf->stringPosition))) |
|
855 return false; |
|
856 |
|
857 fragments.setSize(f, ff->size_array[0] + nf->size_array[0]); |
|
858 fragments.erase_single(n); |
|
859 return true; |
|
860 } |
|
861 return false; |
|
862 } |
|
863 |
|
864 |
|
865 int QTextDocumentPrivate::undoRedo(bool undo) |
|
866 { |
|
867 PMDEBUG("%s, undoState=%d, undoStack size=%d", undo ? "undo:" : "redo:", undoState, undoStack.size()); |
|
868 if (!undoEnabled || (undo && undoState == 0) || (!undo && undoState == undoStack.size())) |
|
869 return -1; |
|
870 |
|
871 undoEnabled = false; |
|
872 beginEditBlock(); |
|
873 while (1) { |
|
874 if (undo) |
|
875 --undoState; |
|
876 QTextUndoCommand &c = undoStack[undoState]; |
|
877 int resetBlockRevision = c.pos; |
|
878 |
|
879 switch(c.command) { |
|
880 case QTextUndoCommand::Inserted: |
|
881 remove(c.pos, c.length, (QTextUndoCommand::Operation)c.operation); |
|
882 PMDEBUG(" erase: from %d, length %d", c.pos, c.length); |
|
883 c.command = QTextUndoCommand::Removed; |
|
884 break; |
|
885 case QTextUndoCommand::Removed: |
|
886 PMDEBUG(" insert: format %d (from %d, length %d, strpos=%d)", c.format, c.pos, c.length, c.strPos); |
|
887 insert_string(c.pos, c.strPos, c.length, c.format, (QTextUndoCommand::Operation)c.operation); |
|
888 c.command = QTextUndoCommand::Inserted; |
|
889 break; |
|
890 case QTextUndoCommand::BlockInserted: |
|
891 case QTextUndoCommand::BlockAdded: |
|
892 remove_block(c.pos, &c.blockFormat, c.command, (QTextUndoCommand::Operation)c.operation); |
|
893 PMDEBUG(" blockremove: from %d", c.pos); |
|
894 if (c.command == QTextUndoCommand::BlockInserted) |
|
895 c.command = QTextUndoCommand::BlockRemoved; |
|
896 else |
|
897 c.command = QTextUndoCommand::BlockDeleted; |
|
898 break; |
|
899 case QTextUndoCommand::BlockRemoved: |
|
900 case QTextUndoCommand::BlockDeleted: |
|
901 PMDEBUG(" blockinsert: charformat %d blockformat %d (pos %d, strpos=%d)", c.format, c.blockFormat, c.pos, c.strPos); |
|
902 insert_block(c.pos, c.strPos, c.format, c.blockFormat, (QTextUndoCommand::Operation)c.operation, c.command); |
|
903 resetBlockRevision += 1; |
|
904 if (c.command == QTextUndoCommand::BlockRemoved) |
|
905 c.command = QTextUndoCommand::BlockInserted; |
|
906 else |
|
907 c.command = QTextUndoCommand::BlockAdded; |
|
908 break; |
|
909 case QTextUndoCommand::CharFormatChanged: { |
|
910 resetBlockRevision = -1; // ## TODO |
|
911 PMDEBUG(" charFormat: format %d (from %d, length %d)", c.format, c.pos, c.length); |
|
912 FragmentIterator it = find(c.pos); |
|
913 Q_ASSERT(!it.atEnd()); |
|
914 |
|
915 int oldFormat = it.value()->format; |
|
916 setCharFormat(c.pos, c.length, formats.charFormat(c.format)); |
|
917 c.format = oldFormat; |
|
918 break; |
|
919 } |
|
920 case QTextUndoCommand::BlockFormatChanged: { |
|
921 resetBlockRevision = -1; // ## TODO |
|
922 PMDEBUG(" blockformat: format %d pos %d", c.format, c.pos); |
|
923 QTextBlock it = blocksFind(c.pos); |
|
924 Q_ASSERT(it.isValid()); |
|
925 |
|
926 int oldFormat = block(it)->format; |
|
927 block(it)->format = c.format; |
|
928 QTextBlockGroup *oldGroup = qobject_cast<QTextBlockGroup *>(objectForFormat(formats.blockFormat(oldFormat))); |
|
929 QTextBlockGroup *group = qobject_cast<QTextBlockGroup *>(objectForFormat(formats.blockFormat(c.format))); |
|
930 c.format = oldFormat; |
|
931 if (group != oldGroup) { |
|
932 if (oldGroup) |
|
933 oldGroup->blockRemoved(it); |
|
934 if (group) |
|
935 group->blockInserted(it); |
|
936 } else if (group) { |
|
937 group->blockFormatChanged(it); |
|
938 } |
|
939 documentChange(it.position(), it.length()); |
|
940 break; |
|
941 } |
|
942 case QTextUndoCommand::GroupFormatChange: { |
|
943 resetBlockRevision = -1; // ## TODO |
|
944 PMDEBUG(" group format change"); |
|
945 QTextObject *object = objectForIndex(c.objectIndex); |
|
946 int oldFormat = formats.objectFormatIndex(c.objectIndex); |
|
947 changeObjectFormat(object, c.format); |
|
948 c.format = oldFormat; |
|
949 break; |
|
950 } |
|
951 case QTextUndoCommand::Custom: |
|
952 resetBlockRevision = -1; // ## TODO |
|
953 if (undo) |
|
954 c.custom->undo(); |
|
955 else |
|
956 c.custom->redo(); |
|
957 break; |
|
958 default: |
|
959 Q_ASSERT(false); |
|
960 } |
|
961 |
|
962 if (resetBlockRevision >= 0) { |
|
963 int b = blocks.findNode(resetBlockRevision); |
|
964 QTextBlockData *B = blocks.fragment(b); |
|
965 B->revision = c.revision; |
|
966 } |
|
967 |
|
968 if (!undo) |
|
969 ++undoState; |
|
970 |
|
971 bool inBlock = ( |
|
972 undoState > 0 |
|
973 && undoState < undoStack.size() |
|
974 && undoStack[undoState].block_part |
|
975 && undoStack[undoState-1].block_part |
|
976 && !undoStack[undoState-1].block_end |
|
977 ); |
|
978 if (!inBlock) |
|
979 break; |
|
980 } |
|
981 undoEnabled = true; |
|
982 int editPos = -1; |
|
983 if (docChangeFrom >= 0) { |
|
984 editPos = qMin(docChangeFrom + docChangeLength, length() - 1); |
|
985 } |
|
986 endEditBlock(); |
|
987 emitUndoAvailable(isUndoAvailable()); |
|
988 emitRedoAvailable(isRedoAvailable()); |
|
989 return editPos; |
|
990 } |
|
991 |
|
992 /*! |
|
993 Appends a custom undo \a item to the undo stack. |
|
994 */ |
|
995 void QTextDocumentPrivate::appendUndoItem(QAbstractUndoItem *item) |
|
996 { |
|
997 if (!undoEnabled) { |
|
998 delete item; |
|
999 return; |
|
1000 } |
|
1001 |
|
1002 QTextUndoCommand c; |
|
1003 c.command = QTextUndoCommand::Custom; |
|
1004 c.block_part = editBlock != 0; |
|
1005 c.block_end = 0; |
|
1006 c.operation = QTextUndoCommand::MoveCursor; |
|
1007 c.format = 0; |
|
1008 c.strPos = 0; |
|
1009 c.pos = 0; |
|
1010 c.blockFormat = 0; |
|
1011 |
|
1012 c.custom = item; |
|
1013 appendUndoItem(c); |
|
1014 } |
|
1015 |
|
1016 void QTextDocumentPrivate::appendUndoItem(const QTextUndoCommand &c) |
|
1017 { |
|
1018 PMDEBUG("appendUndoItem, command=%d enabled=%d", c.command, undoEnabled); |
|
1019 if (!undoEnabled) |
|
1020 return; |
|
1021 if (undoState < undoStack.size()) |
|
1022 truncateUndoStack(); |
|
1023 |
|
1024 if (!undoStack.isEmpty() && modified) { |
|
1025 QTextUndoCommand &last = undoStack[undoState - 1]; |
|
1026 |
|
1027 if ( (last.block_part && c.block_part && !last.block_end) // part of the same block => can merge |
|
1028 || (!c.block_part && !last.block_part)) { // two single undo items => can merge |
|
1029 |
|
1030 if (last.tryMerge(c)) |
|
1031 return; |
|
1032 } |
|
1033 } |
|
1034 if (modifiedState > undoState) |
|
1035 modifiedState = -1; |
|
1036 undoStack.append(c); |
|
1037 undoState++; |
|
1038 emitUndoAvailable(true); |
|
1039 emitRedoAvailable(false); |
|
1040 |
|
1041 if (!c.block_part) |
|
1042 emit document()->undoCommandAdded(); |
|
1043 } |
|
1044 |
|
1045 void QTextDocumentPrivate::truncateUndoStack() |
|
1046 { |
|
1047 if (undoState == undoStack.size()) |
|
1048 return; |
|
1049 |
|
1050 for (int i = undoState; i < undoStack.size(); ++i) { |
|
1051 QTextUndoCommand c = undoStack[i]; |
|
1052 if (c.command & QTextUndoCommand::Removed) { |
|
1053 // ######## |
|
1054 // QTextFragment *f = c.fragment_list; |
|
1055 // while (f) { |
|
1056 // QTextFragment *n = f->right; |
|
1057 // delete f; |
|
1058 // f = n; |
|
1059 // } |
|
1060 } else if (c.command & QTextUndoCommand::Custom) { |
|
1061 delete c.custom; |
|
1062 } |
|
1063 } |
|
1064 undoStack.resize(undoState); |
|
1065 } |
|
1066 |
|
1067 void QTextDocumentPrivate::emitUndoAvailable(bool available) |
|
1068 { |
|
1069 if (available != wasUndoAvailable) { |
|
1070 Q_Q(QTextDocument); |
|
1071 emit q->undoAvailable(available); |
|
1072 wasUndoAvailable = available; |
|
1073 } |
|
1074 } |
|
1075 |
|
1076 void QTextDocumentPrivate::emitRedoAvailable(bool available) |
|
1077 { |
|
1078 if (available != wasRedoAvailable) { |
|
1079 Q_Q(QTextDocument); |
|
1080 emit q->redoAvailable(available); |
|
1081 wasRedoAvailable = available; |
|
1082 } |
|
1083 } |
|
1084 |
|
1085 void QTextDocumentPrivate::enableUndoRedo(bool enable) |
|
1086 { |
|
1087 if (enable && maximumBlockCount > 0) |
|
1088 return; |
|
1089 |
|
1090 if (!enable) { |
|
1091 undoState = 0; |
|
1092 truncateUndoStack(); |
|
1093 emitUndoAvailable(false); |
|
1094 emitRedoAvailable(false); |
|
1095 } |
|
1096 modifiedState = modified ? -1 : undoState; |
|
1097 undoEnabled = enable; |
|
1098 if (!undoEnabled) |
|
1099 compressPieceTable(); |
|
1100 } |
|
1101 |
|
1102 void QTextDocumentPrivate::joinPreviousEditBlock() |
|
1103 { |
|
1104 beginEditBlock(); |
|
1105 |
|
1106 if (undoEnabled && undoState) |
|
1107 undoStack[undoState - 1].block_end = false; |
|
1108 } |
|
1109 |
|
1110 void QTextDocumentPrivate::endEditBlock() |
|
1111 { |
|
1112 Q_ASSERT(editBlock > 0); |
|
1113 if (--editBlock) |
|
1114 return; |
|
1115 |
|
1116 if (undoEnabled && undoState > 0) { |
|
1117 if (undoStack[undoState - 1].block_part) { |
|
1118 undoStack[undoState - 1].block_end = true; |
|
1119 emit document()->undoCommandAdded(); |
|
1120 } |
|
1121 } |
|
1122 |
|
1123 finishEdit(); |
|
1124 } |
|
1125 |
|
1126 void QTextDocumentPrivate::finishEdit() |
|
1127 { |
|
1128 Q_Q(QTextDocument); |
|
1129 |
|
1130 if (editBlock) |
|
1131 return; |
|
1132 |
|
1133 if (framesDirty) |
|
1134 scan_frames(docChangeFrom, docChangeOldLength, docChangeLength); |
|
1135 |
|
1136 if (lout && docChangeFrom >= 0) { |
|
1137 if (!inContentsChange) { |
|
1138 inContentsChange = true; |
|
1139 emit q->contentsChange(docChangeFrom, docChangeOldLength, docChangeLength); |
|
1140 inContentsChange = false; |
|
1141 } |
|
1142 lout->documentChanged(docChangeFrom, docChangeOldLength, docChangeLength); |
|
1143 } |
|
1144 |
|
1145 docChangeFrom = -1; |
|
1146 |
|
1147 if (needsEnsureMaximumBlockCount) { |
|
1148 needsEnsureMaximumBlockCount = false; |
|
1149 if (ensureMaximumBlockCount()) { |
|
1150 // if ensureMaximumBlockCount() returns true |
|
1151 // it will have called endEditBlock() and |
|
1152 // compressPieceTable() itself, so we return here |
|
1153 // to prevent getting two contentsChanged emits |
|
1154 return; |
|
1155 } |
|
1156 } |
|
1157 |
|
1158 while (!changedCursors.isEmpty()) { |
|
1159 QTextCursorPrivate *curs = changedCursors.takeFirst(); |
|
1160 emit q->cursorPositionChanged(QTextCursor(curs)); |
|
1161 } |
|
1162 |
|
1163 contentsChanged(); |
|
1164 |
|
1165 if (blocks.numNodes() != lastBlockCount) { |
|
1166 lastBlockCount = blocks.numNodes(); |
|
1167 emit q->blockCountChanged(lastBlockCount); |
|
1168 } |
|
1169 |
|
1170 if (!undoEnabled && unreachableCharacterCount) |
|
1171 compressPieceTable(); |
|
1172 } |
|
1173 |
|
1174 void QTextDocumentPrivate::documentChange(int from, int length) |
|
1175 { |
|
1176 // qDebug("QTextDocumentPrivate::documentChange: from=%d,length=%d", from, length); |
|
1177 if (docChangeFrom < 0) { |
|
1178 docChangeFrom = from; |
|
1179 docChangeOldLength = length; |
|
1180 docChangeLength = length; |
|
1181 return; |
|
1182 } |
|
1183 int start = qMin(from, docChangeFrom); |
|
1184 int end = qMax(from + length, docChangeFrom + docChangeLength); |
|
1185 int diff = qMax(0, end - start - docChangeLength); |
|
1186 docChangeFrom = start; |
|
1187 docChangeOldLength += diff; |
|
1188 docChangeLength += diff; |
|
1189 } |
|
1190 |
|
1191 /* |
|
1192 adjustDocumentChangesAndCursors is called whenever there is an insert or remove of characters. |
|
1193 param from is the cursor position in the document |
|
1194 param addedOrRemoved is the amount of characters added or removed. A negative number means characters are removed. |
|
1195 |
|
1196 The function stores information to be emitted when finishEdit() is called. |
|
1197 */ |
|
1198 void QTextDocumentPrivate::adjustDocumentChangesAndCursors(int from, int addedOrRemoved, QTextUndoCommand::Operation op) |
|
1199 { |
|
1200 if (!editBlock) |
|
1201 ++revision; |
|
1202 |
|
1203 for (int i = 0; i < cursors.size(); ++i) { |
|
1204 QTextCursorPrivate *curs = cursors.at(i); |
|
1205 if (curs->adjustPosition(from, addedOrRemoved, op) == QTextCursorPrivate::CursorMoved) { |
|
1206 if (!changedCursors.contains(curs)) |
|
1207 changedCursors.append(curs); |
|
1208 } |
|
1209 } |
|
1210 |
|
1211 // qDebug("QTextDocumentPrivate::adjustDocumentChanges: from=%d,addedOrRemoved=%d", from, addedOrRemoved); |
|
1212 if (docChangeFrom < 0) { |
|
1213 docChangeFrom = from; |
|
1214 if (addedOrRemoved > 0) { |
|
1215 docChangeOldLength = 0; |
|
1216 docChangeLength = addedOrRemoved; |
|
1217 } else { |
|
1218 docChangeOldLength = -addedOrRemoved; |
|
1219 docChangeLength = 0; |
|
1220 } |
|
1221 // qDebug("adjustDocumentChanges:"); |
|
1222 // qDebug(" -> %d %d %d", docChangeFrom, docChangeOldLength, docChangeLength); |
|
1223 return; |
|
1224 } |
|
1225 |
|
1226 // have to merge the new change with the already existing one. |
|
1227 int added = qMax(0, addedOrRemoved); |
|
1228 int removed = qMax(0, -addedOrRemoved); |
|
1229 |
|
1230 int diff = 0; |
|
1231 if(from + removed < docChangeFrom) |
|
1232 diff = docChangeFrom - from - removed; |
|
1233 else if(from > docChangeFrom + docChangeLength) |
|
1234 diff = from - (docChangeFrom + docChangeLength); |
|
1235 |
|
1236 int overlap_start = qMax(from, docChangeFrom); |
|
1237 int overlap_end = qMin(from + removed, docChangeFrom + docChangeLength); |
|
1238 int removedInside = qMax(0, overlap_end - overlap_start); |
|
1239 removed -= removedInside; |
|
1240 |
|
1241 // qDebug("adjustDocumentChanges: from=%d, addedOrRemoved=%d, diff=%d, removedInside=%d", from, addedOrRemoved, diff, removedInside); |
|
1242 docChangeFrom = qMin(docChangeFrom, from); |
|
1243 docChangeOldLength += removed + diff; |
|
1244 docChangeLength += added - removedInside + diff; |
|
1245 // qDebug(" -> %d %d %d", docChangeFrom, docChangeOldLength, docChangeLength); |
|
1246 |
|
1247 } |
|
1248 |
|
1249 |
|
1250 QString QTextDocumentPrivate::plainText() const |
|
1251 { |
|
1252 QString result; |
|
1253 result.resize(length()); |
|
1254 const QChar *text_unicode = text.unicode(); |
|
1255 QChar *data = result.data(); |
|
1256 for (QTextDocumentPrivate::FragmentIterator it = begin(); it != end(); ++it) { |
|
1257 const QTextFragmentData *f = *it; |
|
1258 ::memcpy(data, text_unicode + f->stringPosition, f->size_array[0] * sizeof(QChar)); |
|
1259 data += f->size_array[0]; |
|
1260 } |
|
1261 // remove trailing block separator |
|
1262 result.chop(1); |
|
1263 return result; |
|
1264 } |
|
1265 |
|
1266 int QTextDocumentPrivate::blockCharFormatIndex(int node) const |
|
1267 { |
|
1268 int pos = blocks.position(node); |
|
1269 if (pos == 0) |
|
1270 return initialBlockCharFormatIndex; |
|
1271 |
|
1272 return fragments.find(pos - 1)->format; |
|
1273 } |
|
1274 |
|
1275 int QTextDocumentPrivate::nextCursorPosition(int position, QTextLayout::CursorMode mode) const |
|
1276 { |
|
1277 if (position == length()-1) |
|
1278 return position; |
|
1279 |
|
1280 QTextBlock it = blocksFind(position); |
|
1281 int start = it.position(); |
|
1282 int end = start + it.length() - 1; |
|
1283 if (position == end) |
|
1284 return end + 1; |
|
1285 |
|
1286 return it.layout()->nextCursorPosition(position-start, mode) + start; |
|
1287 } |
|
1288 |
|
1289 int QTextDocumentPrivate::previousCursorPosition(int position, QTextLayout::CursorMode mode) const |
|
1290 { |
|
1291 if (position == 0) |
|
1292 return position; |
|
1293 |
|
1294 QTextBlock it = blocksFind(position); |
|
1295 int start = it.position(); |
|
1296 if (position == start) |
|
1297 return start - 1; |
|
1298 |
|
1299 return it.layout()->previousCursorPosition(position-start, mode) + start; |
|
1300 } |
|
1301 |
|
1302 void QTextDocumentPrivate::changeObjectFormat(QTextObject *obj, int format) |
|
1303 { |
|
1304 beginEditBlock(); |
|
1305 int objectIndex = obj->objectIndex(); |
|
1306 int oldFormatIndex = formats.objectFormatIndex(objectIndex); |
|
1307 formats.setObjectFormatIndex(objectIndex, format); |
|
1308 |
|
1309 QTextBlockGroup *b = qobject_cast<QTextBlockGroup *>(obj); |
|
1310 if (b) { |
|
1311 b->d_func()->markBlocksDirty(); |
|
1312 } |
|
1313 QTextFrame *f = qobject_cast<QTextFrame *>(obj); |
|
1314 if (f) |
|
1315 documentChange(f->firstPosition(), f->lastPosition() - f->firstPosition()); |
|
1316 |
|
1317 QT_INIT_TEXTUNDOCOMMAND(c, QTextUndoCommand::GroupFormatChange, (editBlock != 0), QTextUndoCommand::MoveCursor, oldFormatIndex, |
|
1318 0, 0, obj->d_func()->objectIndex, 0); |
|
1319 appendUndoItem(c); |
|
1320 |
|
1321 endEditBlock(); |
|
1322 } |
|
1323 |
|
1324 static QTextFrame *findChildFrame(QTextFrame *f, int pos) |
|
1325 { |
|
1326 // ##### use binary search |
|
1327 QList<QTextFrame *> children = f->childFrames(); |
|
1328 for (int i = 0; i < children.size(); ++i) { |
|
1329 QTextFrame *c = children.at(i); |
|
1330 if (pos >= c->firstPosition() && pos <= c->lastPosition()) |
|
1331 return c; |
|
1332 } |
|
1333 return 0; |
|
1334 } |
|
1335 |
|
1336 QTextFrame *QTextDocumentPrivate::rootFrame() const |
|
1337 { |
|
1338 if (!rtFrame) { |
|
1339 QTextFrameFormat defaultRootFrameFormat; |
|
1340 defaultRootFrameFormat.setMargin(documentMargin); |
|
1341 rtFrame = qobject_cast<QTextFrame *>(const_cast<QTextDocumentPrivate *>(this)->createObject(defaultRootFrameFormat)); |
|
1342 } |
|
1343 return rtFrame; |
|
1344 } |
|
1345 |
|
1346 QTextFrame *QTextDocumentPrivate::frameAt(int pos) const |
|
1347 { |
|
1348 QTextFrame *f = rootFrame(); |
|
1349 |
|
1350 while (1) { |
|
1351 QTextFrame *c = findChildFrame(f, pos); |
|
1352 if (!c) |
|
1353 return f; |
|
1354 f = c; |
|
1355 } |
|
1356 } |
|
1357 |
|
1358 void QTextDocumentPrivate::clearFrame(QTextFrame *f) |
|
1359 { |
|
1360 for (int i = 0; i < f->d_func()->childFrames.count(); ++i) |
|
1361 clearFrame(f->d_func()->childFrames.at(i)); |
|
1362 f->d_func()->childFrames.clear(); |
|
1363 f->d_func()->parentFrame = 0; |
|
1364 } |
|
1365 |
|
1366 void QTextDocumentPrivate::scan_frames(int pos, int charsRemoved, int charsAdded) |
|
1367 { |
|
1368 // ###### optimise |
|
1369 Q_UNUSED(pos); |
|
1370 Q_UNUSED(charsRemoved); |
|
1371 Q_UNUSED(charsAdded); |
|
1372 |
|
1373 QTextFrame *f = rootFrame(); |
|
1374 clearFrame(f); |
|
1375 |
|
1376 for (FragmentIterator it = begin(); it != end(); ++it) { |
|
1377 // QTextFormat fmt = formats.format(it->format); |
|
1378 QTextFrame *frame = qobject_cast<QTextFrame *>(objectForFormat(it->format)); |
|
1379 if (!frame) |
|
1380 continue; |
|
1381 |
|
1382 Q_ASSERT(it.size() == 1); |
|
1383 QChar ch = text.at(it->stringPosition); |
|
1384 |
|
1385 if (ch == QTextBeginningOfFrame) { |
|
1386 if (f != frame) { |
|
1387 // f == frame happens for tables |
|
1388 Q_ASSERT(frame->d_func()->fragment_start == it.n || frame->d_func()->fragment_start == 0); |
|
1389 frame->d_func()->parentFrame = f; |
|
1390 f->d_func()->childFrames.append(frame); |
|
1391 f = frame; |
|
1392 } |
|
1393 } else if (ch == QTextEndOfFrame) { |
|
1394 Q_ASSERT(f == frame); |
|
1395 Q_ASSERT(frame->d_func()->fragment_end == it.n || frame->d_func()->fragment_end == 0); |
|
1396 f = frame->d_func()->parentFrame; |
|
1397 } else if (ch == QChar::ObjectReplacementCharacter) { |
|
1398 Q_ASSERT(f != frame); |
|
1399 Q_ASSERT(frame->d_func()->fragment_start == it.n || frame->d_func()->fragment_start == 0); |
|
1400 Q_ASSERT(frame->d_func()->fragment_end == it.n || frame->d_func()->fragment_end == 0); |
|
1401 frame->d_func()->parentFrame = f; |
|
1402 f->d_func()->childFrames.append(frame); |
|
1403 } else { |
|
1404 Q_ASSERT(false); |
|
1405 } |
|
1406 } |
|
1407 Q_ASSERT(f == rtFrame); |
|
1408 framesDirty = false; |
|
1409 } |
|
1410 |
|
1411 void QTextDocumentPrivate::insert_frame(QTextFrame *f) |
|
1412 { |
|
1413 int start = f->firstPosition(); |
|
1414 int end = f->lastPosition(); |
|
1415 QTextFrame *parent = frameAt(start-1); |
|
1416 Q_ASSERT(parent == frameAt(end+1)); |
|
1417 |
|
1418 if (start != end) { |
|
1419 // iterator over the parent and move all children contained in my frame to myself |
|
1420 for (int i = 0; i < parent->d_func()->childFrames.size(); ++i) { |
|
1421 QTextFrame *c = parent->d_func()->childFrames.at(i); |
|
1422 if (start < c->firstPosition() && end > c->lastPosition()) { |
|
1423 parent->d_func()->childFrames.removeAt(i); |
|
1424 f->d_func()->childFrames.append(c); |
|
1425 c->d_func()->parentFrame = f; |
|
1426 } |
|
1427 } |
|
1428 } |
|
1429 // insert at the correct position |
|
1430 int i = 0; |
|
1431 for (; i < parent->d_func()->childFrames.size(); ++i) { |
|
1432 QTextFrame *c = parent->d_func()->childFrames.at(i); |
|
1433 if (c->firstPosition() > end) |
|
1434 break; |
|
1435 } |
|
1436 parent->d_func()->childFrames.insert(i, f); |
|
1437 f->d_func()->parentFrame = parent; |
|
1438 } |
|
1439 |
|
1440 QTextFrame *QTextDocumentPrivate::insertFrame(int start, int end, const QTextFrameFormat &format) |
|
1441 { |
|
1442 Q_ASSERT(start >= 0 && start < length()); |
|
1443 Q_ASSERT(end >= 0 && end < length()); |
|
1444 Q_ASSERT(start <= end || end == -1); |
|
1445 |
|
1446 if (start != end && frameAt(start) != frameAt(end)) |
|
1447 return 0; |
|
1448 |
|
1449 beginEditBlock(); |
|
1450 |
|
1451 QTextFrame *frame = qobject_cast<QTextFrame *>(createObject(format)); |
|
1452 Q_ASSERT(frame); |
|
1453 |
|
1454 // #### using the default block and char format below might be wrong |
|
1455 int idx = formats.indexForFormat(QTextBlockFormat()); |
|
1456 QTextCharFormat cfmt; |
|
1457 cfmt.setObjectIndex(frame->objectIndex()); |
|
1458 int charIdx = formats.indexForFormat(cfmt); |
|
1459 |
|
1460 insertBlock(QTextBeginningOfFrame, start, idx, charIdx, QTextUndoCommand::MoveCursor); |
|
1461 insertBlock(QTextEndOfFrame, ++end, idx, charIdx, QTextUndoCommand::KeepCursor); |
|
1462 |
|
1463 frame->d_func()->fragment_start = find(start).n; |
|
1464 frame->d_func()->fragment_end = find(end).n; |
|
1465 |
|
1466 insert_frame(frame); |
|
1467 |
|
1468 endEditBlock(); |
|
1469 |
|
1470 return frame; |
|
1471 } |
|
1472 |
|
1473 void QTextDocumentPrivate::removeFrame(QTextFrame *frame) |
|
1474 { |
|
1475 QTextFrame *parent = frame->d_func()->parentFrame; |
|
1476 if (!parent) |
|
1477 return; |
|
1478 |
|
1479 int start = frame->firstPosition(); |
|
1480 int end = frame->lastPosition(); |
|
1481 Q_ASSERT(end >= start); |
|
1482 |
|
1483 beginEditBlock(); |
|
1484 |
|
1485 // remove already removes the frames from the tree |
|
1486 remove(end, 1); |
|
1487 remove(start-1, 1); |
|
1488 |
|
1489 endEditBlock(); |
|
1490 } |
|
1491 |
|
1492 QTextObject *QTextDocumentPrivate::objectForIndex(int objectIndex) const |
|
1493 { |
|
1494 if (objectIndex < 0) |
|
1495 return 0; |
|
1496 |
|
1497 QTextObject *object = objects.value(objectIndex, 0); |
|
1498 if (!object) { |
|
1499 QTextDocumentPrivate *that = const_cast<QTextDocumentPrivate *>(this); |
|
1500 QTextFormat fmt = formats.objectFormat(objectIndex); |
|
1501 object = that->createObject(fmt, objectIndex); |
|
1502 } |
|
1503 return object; |
|
1504 } |
|
1505 |
|
1506 QTextObject *QTextDocumentPrivate::objectForFormat(int formatIndex) const |
|
1507 { |
|
1508 int objectIndex = formats.format(formatIndex).objectIndex(); |
|
1509 return objectForIndex(objectIndex); |
|
1510 } |
|
1511 |
|
1512 QTextObject *QTextDocumentPrivate::objectForFormat(const QTextFormat &f) const |
|
1513 { |
|
1514 return objectForIndex(f.objectIndex()); |
|
1515 } |
|
1516 |
|
1517 QTextObject *QTextDocumentPrivate::createObject(const QTextFormat &f, int objectIndex) |
|
1518 { |
|
1519 QTextObject *obj = document()->createObject(f); |
|
1520 |
|
1521 if (obj) { |
|
1522 obj->d_func()->objectIndex = objectIndex == -1 ? formats.createObjectIndex(f) : objectIndex; |
|
1523 objects[obj->d_func()->objectIndex] = obj; |
|
1524 } |
|
1525 |
|
1526 return obj; |
|
1527 } |
|
1528 |
|
1529 void QTextDocumentPrivate::deleteObject(QTextObject *object) |
|
1530 { |
|
1531 const int objIdx = object->d_func()->objectIndex; |
|
1532 objects.remove(objIdx); |
|
1533 delete object; |
|
1534 } |
|
1535 |
|
1536 void QTextDocumentPrivate::contentsChanged() |
|
1537 { |
|
1538 Q_Q(QTextDocument); |
|
1539 if (editBlock) |
|
1540 return; |
|
1541 |
|
1542 bool m = undoEnabled ? (modifiedState != undoState) : true; |
|
1543 if (modified != m) { |
|
1544 modified = m; |
|
1545 emit q->modificationChanged(modified); |
|
1546 } |
|
1547 |
|
1548 emit q->contentsChanged(); |
|
1549 } |
|
1550 |
|
1551 void QTextDocumentPrivate::compressPieceTable() |
|
1552 { |
|
1553 if (undoEnabled) |
|
1554 return; |
|
1555 |
|
1556 const uint garbageCollectionThreshold = 96 * 1024; // bytes |
|
1557 |
|
1558 //qDebug() << "unreachable bytes:" << unreachableCharacterCount * sizeof(QChar) << " -- limit" << garbageCollectionThreshold << "text size =" << text.size() << "capacity:" << text.capacity(); |
|
1559 |
|
1560 bool compressTable = unreachableCharacterCount * sizeof(QChar) > garbageCollectionThreshold |
|
1561 && text.size() >= text.capacity() * 0.9; |
|
1562 if (!compressTable) |
|
1563 return; |
|
1564 |
|
1565 QString newText; |
|
1566 newText.resize(text.size()); |
|
1567 QChar *newTextPtr = newText.data(); |
|
1568 int newLen = 0; |
|
1569 |
|
1570 for (FragmentMap::Iterator it = fragments.begin(); !it.atEnd(); ++it) { |
|
1571 qMemCopy(newTextPtr, text.constData() + it->stringPosition, it->size_array[0] * sizeof(QChar)); |
|
1572 it->stringPosition = newLen; |
|
1573 newTextPtr += it->size_array[0]; |
|
1574 newLen += it->size_array[0]; |
|
1575 } |
|
1576 |
|
1577 newText.resize(newLen); |
|
1578 newText.squeeze(); |
|
1579 //qDebug() << "removed" << text.size() - newText.size() << "characters"; |
|
1580 text = newText; |
|
1581 unreachableCharacterCount = 0; |
|
1582 } |
|
1583 |
|
1584 void QTextDocumentPrivate::setModified(bool m) |
|
1585 { |
|
1586 Q_Q(QTextDocument); |
|
1587 if (m == modified) |
|
1588 return; |
|
1589 |
|
1590 modified = m; |
|
1591 if (!modified) |
|
1592 modifiedState = undoState; |
|
1593 else |
|
1594 modifiedState = -1; |
|
1595 |
|
1596 emit q->modificationChanged(modified); |
|
1597 } |
|
1598 |
|
1599 bool QTextDocumentPrivate::ensureMaximumBlockCount() |
|
1600 { |
|
1601 if (maximumBlockCount <= 0) |
|
1602 return false; |
|
1603 if (blocks.numNodes() <= maximumBlockCount) |
|
1604 return false; |
|
1605 |
|
1606 beginEditBlock(); |
|
1607 |
|
1608 const int blocksToRemove = blocks.numNodes() - maximumBlockCount; |
|
1609 QTextCursor cursor(this, 0); |
|
1610 cursor.movePosition(QTextCursor::NextBlock, QTextCursor::KeepAnchor, blocksToRemove); |
|
1611 |
|
1612 unreachableCharacterCount += cursor.selectionEnd() - cursor.selectionStart(); |
|
1613 |
|
1614 // preserve the char format of the paragraph that is to become the new first one |
|
1615 QTextCharFormat charFmt = cursor.blockCharFormat(); |
|
1616 cursor.removeSelectedText(); |
|
1617 cursor.setBlockCharFormat(charFmt); |
|
1618 |
|
1619 endEditBlock(); |
|
1620 |
|
1621 compressPieceTable(); |
|
1622 |
|
1623 return true; |
|
1624 } |
|
1625 |
|
1626 /// This method is called from QTextTable when it is about to remove a table-cell to allow cursors to update their selection. |
|
1627 void QTextDocumentPrivate::aboutToRemoveCell(int from, int to) |
|
1628 { |
|
1629 Q_ASSERT(from <= to); |
|
1630 for (int i = 0; i < cursors.size(); ++i) |
|
1631 cursors.at(i)->aboutToRemoveCell(from, to); |
|
1632 } |
|
1633 |
|
1634 QT_END_NAMESPACE |