1 /***************************************************************************
2 * Copyright (C) 2005-09 by the Quassel Project *
3 * devel@quassel-irc.org *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) version 3. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
21 #include <QFontMetrics>
22 #include <QTextBoundaryFinder>
24 #include "chatlinemodelitem.h"
25 #include "chatlinemodel.h"
27 #include "qtuistyle.h"
29 // This Struct is taken from Harfbuzz. We use it only to calc it's size.
30 // we use a shared memory region so we do not have to malloc a buffer area for every line
32 /*HB_LineBreakType*/ unsigned lineBreakType :2;
33 /*HB_Bool*/ unsigned whiteSpace :1; /* A unicode whitespace character, except NBSP, ZWNBSP */
34 /*HB_Bool*/ unsigned charStop :1; /* Valid cursor position (for left/right arrow) */
35 /*HB_Bool*/ unsigned wordBoundary :1;
36 /*HB_Bool*/ unsigned sentenceBoundary :1;
38 } HB_CharAttributes_Dummy;
41 unsigned char *ChatLineModelItem::TextBoundaryFinderBuffer = (unsigned char *)malloc(512 * sizeof(HB_CharAttributes_Dummy));
42 int ChatLineModelItem::TextBoundaryFinderBufferSize = 512 * (sizeof(HB_CharAttributes_Dummy) / sizeof(unsigned char));
44 // ****************************************
45 // the actual ChatLineModelItem
46 // ****************************************
47 ChatLineModelItem::ChatLineModelItem(const Message &msg)
51 if(!msg.sender().contains('!'))
52 _styledMsg.setFlags(msg.flags() |= Message::ServerMsg);
55 QVariant ChatLineModelItem::data(int column, int role) const {
56 MessageModel::ColumnType col = (MessageModel::ColumnType)column;
59 case ChatLineModel::TimestampColumn:
60 variant = timestampData(role);
62 case ChatLineModel::SenderColumn:
63 variant = senderData(role);
65 case ChatLineModel::ContentsColumn:
66 variant = contentsData(role);
71 if(!variant.isValid())
72 return MessageModelItem::data(column, role);
76 QVariant ChatLineModelItem::timestampData(int role) const {
78 case ChatLineModel::DisplayRole:
79 return _styledMsg.decoratedTimestamp();
80 case ChatLineModel::EditRole:
81 return _styledMsg.timestamp();
82 case ChatLineModel::FormatRole:
83 return QVariant::fromValue<UiStyle::FormatList>(UiStyle::FormatList() << qMakePair((quint16)0, (quint32)_styledMsg.timestampFormat()));
88 QVariant ChatLineModelItem::senderData(int role) const {
90 case ChatLineModel::DisplayRole:
91 return _styledMsg.decoratedSender();
92 case ChatLineModel::EditRole:
93 return _styledMsg.plainSender();
94 case ChatLineModel::FormatRole:
95 return QVariant::fromValue<UiStyle::FormatList>(UiStyle::FormatList() << qMakePair((quint16)0, (quint32)_styledMsg.senderFormat()));
100 QVariant ChatLineModelItem::contentsData(int role) const {
101 if(_styledMsg.needsStyling())
102 _styledMsg.style(QtUi::style());
105 case ChatLineModel::DisplayRole:
106 case ChatLineModel::EditRole:
107 return _styledMsg.plainContents();
108 case ChatLineModel::FormatRole:
109 return QVariant::fromValue<UiStyle::FormatList>(_styledMsg.contentsFormatList());
110 case ChatLineModel::WrapListRole:
111 if(_wrapList.isEmpty())
113 return QVariant::fromValue<ChatLineModel::WrapList>(_wrapList);
118 void ChatLineModelItem::computeWrapList() const {
119 int length = _styledMsg.plainContents().length();
123 enum Mode { SearchStart, SearchEnd };
125 QList<ChatLineModel::Word> wplist; // use a temp list which we'll later copy into a QVector for efficiency
126 QTextBoundaryFinder finder(QTextBoundaryFinder::Word, _styledMsg.plainContents().unicode(), length,
127 TextBoundaryFinderBuffer, TextBoundaryFinderBufferSize);
131 bool wordStart = false;
132 bool wordEnd = false;
133 Mode mode = SearchEnd;
134 ChatLineModel::Word word;
136 qreal wordstartx = 0;
138 QTextLayout layout(_styledMsg.plainContents());
140 option.setWrapMode(QTextOption::NoWrap);
141 layout.setTextOption(option);
143 layout.setAdditionalFormats(QtUi::style()->toTextLayoutList(_styledMsg.contentsFormatList(), length));
144 layout.beginLayout();
145 QTextLine line = layout.createLine();
146 line.setNumColumns(length);
150 idx = finder.toNextBoundary();
157 wordStart = finder.boundaryReasons().testFlag(QTextBoundaryFinder::StartWord);
158 wordEnd = finder.boundaryReasons().testFlag(QTextBoundaryFinder::EndWord);
161 //if(flg) qDebug() << idx << mode << wordStart << wordEnd << contents->plainText.left(idx) << contents->plainText.mid(idx);
163 if(mode == SearchEnd || (!wordStart && wordEnd)) {
164 if(wordStart || !wordEnd) continue;
169 qreal wordendx = line.cursorToX(oldidx);
170 qreal trailingendx = line.cursorToX(idx);
171 word.endX = wordendx;
172 word.width = wordendx - wordstartx;
173 word.trailing = trailingendx - wordendx;
174 wordstartx = trailingendx;
181 // the part " || (finder.position() == contents->plainText.length())" shouldn't be necessary
182 // but in rare and indeterministic cases Qt states that the end of the text is not a boundary o_O
183 } while(finder.isAtBoundary() || (finder.position() == length));
185 // A QVector needs less space than a QList
186 _wrapList.resize(wplist.count());
187 for(int i = 0; i < wplist.count(); i++) {
188 _wrapList[i] = wplist.at(i);