forked from blue/squawk
an attempt to display text in a better way with QTextDocument + QTextBrowser
This commit is contained in:
parent
51ac1ac709
commit
d86e2c28a0
@ -40,5 +40,5 @@ QString Shared::processMessageBody(const QString& msg)
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{
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QString processed = msg.toHtmlEscaped();
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processed.replace(urlReg, "<a href=\"\\1\">\\1</a>");
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return "<p style=\"white-space: pre-wrap;\">" + processed + "</p>";
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return "<p style=\"white-space: pre-wrap; line-height: 1em;\">" + processed + "</p>";
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}
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@ -15,6 +15,4 @@ target_sources(squawk PRIVATE
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resizer.h
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shadowoverlay.cpp
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shadowoverlay.h
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textmeter.cpp
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textmeter.h
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)
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@ -1,233 +0,0 @@
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// Squawk messenger.
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// Copyright (C) 2019 Yury Gubich <blue@macaw.me>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "textmeter.h"
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#include <QDebug>
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#include <QApplication>
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TextMeter::TextMeter():
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base(),
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fonts()
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{
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}
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TextMeter::~TextMeter()
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{
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}
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void TextMeter::initializeFonts(const QFont& font)
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{
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fonts.clear();
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QList<QFontDatabase::WritingSystem> supported = base.writingSystems(font.family());
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std::set<QFontDatabase::WritingSystem> sup;
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std::set<QString> added({font.family()});
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for (const QFontDatabase::WritingSystem& system : supported) {
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sup.insert(system);
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}
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fonts.push_back(QFontMetrics(font));
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QString style = base.styleString(font);
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QList<QFontDatabase::WritingSystem> systems = base.writingSystems();
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for (const QFontDatabase::WritingSystem& system : systems) {
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if (sup.count(system) == 0) {
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QStringList families = base.families(system);
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if (!families.empty() && added.count(families.first()) == 0) {
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QString family(families.first());
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QFont nfont = base.font(family, style, font.pointSize());
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if (added.count(nfont.family()) == 0) {
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added.insert(family);
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fonts.push_back(QFontMetrics(nfont));
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qDebug() << "Added font" << nfont.family() << "for" << system;
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}
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}
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}
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}
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}
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QSize TextMeter::boundingSize(const QString& text, const QSize& limits) const
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{
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// QString str("ridiculus mus. Suspendisse potenti. Cras pretium venenatis enim, faucibus accumsan ex");
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// bool first = true;
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// int width = 0;
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// QStringList list = str.split(" ");
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// QFontMetrics m = fonts.front();
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// for (const QString& word : list) {
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// if (first) {
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// first = false;
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// } else {
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// width += m.horizontalAdvance(QChar::Space);
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// }
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// width += m.horizontalAdvance(word);
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// for (const QChar& ch : word) {
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// width += m.horizontalAdvance(ch);
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// }
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// }
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// qDebug() << "together:" << m.horizontalAdvance(str);
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// qDebug() << "apart:" << width;
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// I cant measure or wrap text this way, this simple example shows that even this gives differen result
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// The Qt implementation under it is thousands and thousands lines of code in QTextEngine
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// I simply can't get though it
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if (text.size() == 0) {
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return QSize (0, 0);
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}
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Helper current(limits.width());
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for (const QChar& ch : text) {
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if (newLine(ch)) {
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current.computeNewWord();
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if (current.height == 0) {
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current.height = fonts.front().lineSpacing();
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}
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current.beginNewLine();
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} else if (visible(ch)) {
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bool found = false;
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for (const QFontMetrics& metrics : fonts) {
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if (metrics.inFont(ch)) {
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current.computeChar(ch, metrics);
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found = true;
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break;
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}
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}
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if (!found) {
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current.computeChar(ch, fonts.front());
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}
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}
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}
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current.computeNewWord();
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current.beginNewLine();
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int& height = current.size.rheight();
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if (height > 0) {
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height -= fonts.front().leading();
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}
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return current.size;
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}
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void TextMeter::Helper::computeChar(const QChar& ch, const QFontMetrics& metrics)
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{
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int ha = metrics.horizontalAdvance(ch);
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if (newWord(ch)) {
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if (printOnLineBreak(ch)) {
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if (!lineOverflow(metrics, ha, ch)){
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computeNewWord();
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}
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} else {
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computeNewWord();
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delayedSpaceWidth = ha;
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lastSpace = ch;
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}
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} else {
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lineOverflow(metrics, ha, ch);
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}
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}
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void TextMeter::Helper::computeNewLine(const QFontMetrics& metrics, int horizontalAdvance, const QChar& ch)
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{
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if (wordBeganWithTheLine) {
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text = word.chopped(1);
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width = wordWidth - horizontalAdvance;
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height = wordHeight;
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}
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if (width != metrics.horizontalAdvance(text)) {
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qDebug() << "Kerning Error" << width - metrics.horizontalAdvance(text);
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}
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beginNewLine();
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if (wordBeganWithTheLine) {
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word = ch;
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wordWidth = horizontalAdvance;
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wordHeight = metrics.lineSpacing();
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}
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wordBeganWithTheLine = true;
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delayedSpaceWidth = 0;
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lastSpace = QChar::Null;
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}
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void TextMeter::Helper::beginNewLine()
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{
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size.rheight() += height;
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size.rwidth() = qMax(size.width(), width);
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qDebug() << text;
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text = "";
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width = 0;
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height = 0;
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}
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void TextMeter::Helper::computeNewWord()
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{
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width += wordWidth + delayedSpaceWidth;
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height = qMax(height, wordHeight);
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if (lastSpace != QChar::Null) {
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text += lastSpace;
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}
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text += word;
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word = "";
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wordWidth = 0;
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wordHeight = 0;
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delayedSpaceWidth = 0;
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lastSpace = QChar::Null;
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wordBeganWithTheLine = false;
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}
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bool TextMeter::Helper::lineOverflow(const QFontMetrics& metrics, int horizontalAdvance, const QChar& ch)
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{
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wordHeight = qMax(wordHeight, metrics.lineSpacing());
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wordWidth += horizontalAdvance;
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word += ch;
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if (width + delayedSpaceWidth + wordWidth > maxWidth) {
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computeNewLine(metrics, horizontalAdvance, ch);
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return true;
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}
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return false;
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}
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bool TextMeter::newLine(const QChar& ch)
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{
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return ch == QChar::LineFeed;
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}
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bool TextMeter::newWord(const QChar& ch)
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{
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return ch.isSpace() || ch.isPunct();
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}
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bool TextMeter::printOnLineBreak(const QChar& ch)
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{
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return ch != QChar::Space;
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}
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bool TextMeter::visible(const QChar& ch)
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{
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return true;
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}
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TextMeter::Helper::Helper(int p_maxWidth):
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width(0),
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height(0),
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wordWidth(0),
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wordHeight(0),
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delayedSpaceWidth(0),
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maxWidth(p_maxWidth),
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wordBeganWithTheLine(true),
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text(""),
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word(""),
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lastSpace(QChar::Null),
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size(0, 0)
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{
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}
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@ -1,68 +0,0 @@
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// Squawk messenger.
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// Copyright (C) 2019 Yury Gubich <blue@macaw.me>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef TEXTMETER_H
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#define TEXTMETER_H
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#include <list>
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#include <set>
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#include <QFontMetrics>
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#include <QFont>
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#include <QSize>
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#include <QFontDatabase>
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class TextMeter
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{
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public:
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TextMeter();
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~TextMeter();
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void initializeFonts(const QFont& font);
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QSize boundingSize(const QString& text, const QSize& limits) const;
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private:
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QFontDatabase base;
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std::list<QFontMetrics> fonts;
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struct Helper {
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Helper(int maxWidth);
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int width;
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int height;
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int wordWidth;
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int wordHeight;
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int delayedSpaceWidth;
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int maxWidth;
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bool wordBeganWithTheLine;
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QString text;
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QString word;
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QChar lastSpace;
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QSize size;
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void computeNewLine(const QFontMetrics& metrics, int horizontalAdvance, const QChar& ch);
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void computeChar(const QChar& ch, const QFontMetrics& metrics);
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void computeNewWord();
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void beginNewLine();
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bool lineOverflow(const QFontMetrics& metrics, int horizontalAdvance, const QChar& ch);
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};
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static bool newLine(const QChar& ch);
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static bool newWord(const QChar& ch);
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static bool visible(const QChar& ch);
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static bool printOnLineBreak(const QChar& ch);
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};
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#endif // TEXTMETER_H
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@ -343,6 +343,7 @@ void FeedView::paintEvent(QPaintEvent* event)
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QDateTime lastDate;
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bool first = true;
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QRect viewportRect = vp->rect();
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for (const QModelIndex& index : toRener) {
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QDateTime currentDate = index.data(Models::MessageFeed::Date).toDateTime();
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option.rect = visualRect(index);
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@ -356,7 +357,10 @@ void FeedView::paintEvent(QPaintEvent* event)
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}
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first = false;
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}
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bool mouseOver = option.rect.contains(cursor) && vp->rect().contains(cursor);
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QRect stripe = option.rect;
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stripe.setLeft(0);
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stripe.setWidth(viewportRect.width());
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bool mouseOver = stripe.contains(cursor) && viewportRect.contains(cursor);
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option.state.setFlag(QStyle::State_MouseOver, mouseOver);
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itemDelegate(index)->paint(&painter, option, index);
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@ -22,6 +22,7 @@
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#include <QApplication>
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#include <QMouseEvent>
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#include <QAbstractItemView>
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#include <QtMath>
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#include "messagedelegate.h"
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#include "messagefeed.h"
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@ -42,7 +43,7 @@ MessageDelegate::MessageDelegate(QObject* parent):
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nickFont(),
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dateFont(),
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bodyMetrics(bodyFont),
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bodyMeter(),
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bodyRenderer(new QTextDocument()),
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nickMetrics(nickFont),
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dateMetrics(dateFont),
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buttonHeight(0),
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@ -52,11 +53,13 @@ MessageDelegate::MessageDelegate(QObject* parent):
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bars(new std::map<QString, QProgressBar*>()),
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statusIcons(new std::map<QString, QLabel*>()),
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pencilIcons(new std::map<QString, QLabel*>()),
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bodies(new std::map<QString, QLabel*>()),
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bodies(new std::map<QString, QTextBrowser*>()),
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previews(new std::map<QString, Preview*>()),
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idsToKeep(new std::set<QString>()),
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clearingWidgets(false)
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{
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bodyRenderer->setDocumentMargin(0);
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QPushButton btn(QCoreApplication::translate("MessageLine", "Download"));
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buttonHeight = btn.sizeHint().height();
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buttonWidth = btn.sizeHint().width();
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@ -83,7 +86,7 @@ MessageDelegate::~MessageDelegate()
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delete pair.second;
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}
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for (const std::pair<const QString, QLabel*>& pair: *bodies){
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for (const std::pair<const QString, QTextBrowser*>& pair: *bodies){
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delete pair.second;
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}
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@ -98,6 +101,7 @@ MessageDelegate::~MessageDelegate()
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delete bars;
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delete bodies;
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delete previews;
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delete bodyRenderer;
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}
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void MessageDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
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@ -124,8 +128,6 @@ void MessageDelegate::paint(QPainter* painter, const QStyleOptionViewItem& optio
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opt.displayAlignment = Qt::AlignRight | Qt::AlignTop;
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}
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QSize bodySize = bodyMeter.boundingSize(data.text, opt.rect.size());
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QRect rect;
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if (ntds) {
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painter->setFont(nickFont);
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@ -168,15 +170,7 @@ void MessageDelegate::paint(QPainter* painter, const QStyleOptionViewItem& optio
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painter->restore();
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QWidget* vp = static_cast<QWidget*>(painter->device());
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if (data.text.size() > 0) {
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QLabel* body = getBody(data);
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body->setParent(vp);
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body->setMinimumSize(bodySize);
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body->setMaximumSize(bodySize);
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body->move(opt.rect.left(), opt.rect.y());
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body->show();
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opt.rect.adjust(0, bodySize.height() + textMargin, 0, 0);
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}
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paintBody(data, painter, opt);
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painter->setFont(dateFont);
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QColor q = painter->pen().color();
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QString dateString = data.date.toLocalTime().toString("hh:mm");
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@ -304,7 +298,12 @@ QSize MessageDelegate::sizeHint(const QStyleOptionViewItem& option, const QModel
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Models::FeedItem data = qvariant_cast<Models::FeedItem>(vi);
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QSize messageSize(0, 0);
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if (data.text.size() > 0) {
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messageSize = bodyMeter.boundingSize(data.text, messageRect.size());
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bodyRenderer->setPlainText(data.text);
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bodyRenderer->setTextWidth(messageRect.size().width());
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QSizeF size = bodyRenderer->size();
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size.setWidth(bodyRenderer->idealWidth());
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messageSize = QSize(qCeil(size.width()), qCeil(size.height()));
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messageSize.rheight() += textMargin;
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}
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@ -393,7 +392,7 @@ void MessageDelegate::initializeFonts(const QFont& font)
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nickMetrics = QFontMetrics(nickFont);
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dateMetrics = QFontMetrics(dateFont);
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bodyMeter.initializeFonts(bodyFont);
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bodyRenderer->setDefaultFont(bodyFont);
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Preview::initializeFont(bodyFont);
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}
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@ -573,34 +572,36 @@ QLabel * MessageDelegate::getPencilIcon(const Models::FeedItem& data) const
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return result;
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}
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QLabel * MessageDelegate::getBody(const Models::FeedItem& data) const
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QTextBrowser * MessageDelegate::getBody(const Models::FeedItem& data) const
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{
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std::map<QString, QLabel*>::const_iterator itr = bodies->find(data.id);
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QLabel* result = 0;
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std::map<QString, QTextBrowser*>::const_iterator itr = bodies->find(data.id);
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QTextBrowser* result = 0;
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if (itr != bodies->end()) {
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result = itr->second;
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} else {
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result = new QLabel();
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result = new QTextBrowser();
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result->setFont(bodyFont);
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result->setContextMenuPolicy(Qt::NoContextMenu);
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result->setWordWrap(true);
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result->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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result->setContentsMargins(0, 0, 0, 0);
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//result->viewport()->setAutoFillBackground(false);
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result->document()->setDocumentMargin(0);
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result->setFrameStyle(0);
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result->setLineWidth(0);
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//result->setAutoFillBackground(false);
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//->setWordWrap(true);
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result->setOpenExternalLinks(true);
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//result->setTextInteractionFlags(result->textInteractionFlags() | Qt::TextSelectableByMouse | Qt::LinksAccessibleByMouse);
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result->setOpenExternalLinks(true);
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result->setTextInteractionFlags(result->textInteractionFlags() | Qt::TextSelectableByMouse | Qt::LinksAccessibleByMouse);
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bodies->insert(std::make_pair(data.id, result));
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}
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result->setText(Shared::processMessageBody(data.text));
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result->setHtml(Shared::processMessageBody(data.text));
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return result;
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}
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void MessageDelegate::beginClearWidgets()
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{
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idsToKeep->clear();
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clearingWidgets = true;
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}
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template <typename T>
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void removeElements(std::map<QString, T*>* elements, std::set<QString>* idsToKeep) {
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std::set<QString> toRemove;
|
||||
@ -615,6 +616,51 @@ void removeElements(std::map<QString, T*>* elements, std::set<QString>* idsToKee
|
||||
}
|
||||
}
|
||||
|
||||
int MessageDelegate::paintBody(const Models::FeedItem& data, QPainter* painter, QStyleOptionViewItem& option) const
|
||||
{
|
||||
if (data.text.size() > 0) {
|
||||
bodyRenderer->setHtml(Shared::processMessageBody(data.text));
|
||||
bodyRenderer->setTextWidth(option.rect.size().width());
|
||||
painter->save();
|
||||
painter->translate(option.rect.topLeft());
|
||||
bodyRenderer->drawContents(painter);
|
||||
painter->restore();
|
||||
QSize bodySize(qCeil(bodyRenderer->idealWidth()), qCeil(bodyRenderer->size().height()));
|
||||
|
||||
|
||||
QTextBrowser* editor = nullptr;
|
||||
if (option.state.testFlag(QStyle::State_MouseOver)) {
|
||||
std::set<QString> ids({data.id});
|
||||
removeElements(bodies, &ids);
|
||||
editor = getBody(data);
|
||||
editor->setParent(static_cast<QWidget*>(painter->device()));
|
||||
} else {
|
||||
std::map<QString, QTextBrowser*>::const_iterator itr = bodies->find(data.id);
|
||||
if (itr != bodies->end()) {
|
||||
editor = itr->second;
|
||||
}
|
||||
}
|
||||
if (editor != nullptr) {
|
||||
editor->setMinimumSize(bodySize);
|
||||
editor->setMaximumSize(bodySize);
|
||||
editor->move(option.rect.left(), option.rect.y());
|
||||
editor->show();
|
||||
}
|
||||
|
||||
option.rect.adjust(0, bodySize.height() + textMargin, 0, 0);
|
||||
return bodySize.width();
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void MessageDelegate::beginClearWidgets()
|
||||
{
|
||||
idsToKeep->clear();
|
||||
clearingWidgets = true;
|
||||
}
|
||||
|
||||
|
||||
|
||||
void MessageDelegate::endClearWidgets()
|
||||
{
|
||||
if (clearingWidgets) {
|
||||
|
@ -29,12 +29,13 @@
|
||||
#include <QPushButton>
|
||||
#include <QProgressBar>
|
||||
#include <QLabel>
|
||||
#include <QTextEdit>
|
||||
#include <QTextBrowser>
|
||||
|
||||
#include "shared/icons.h"
|
||||
#include "shared/global.h"
|
||||
#include "shared/utils.h"
|
||||
#include "shared/pathcheck.h"
|
||||
#include "ui/utils/textmeter.h"
|
||||
|
||||
#include "preview.h"
|
||||
|
||||
@ -70,13 +71,15 @@ protected:
|
||||
int paintBar(QProgressBar* bar, QPainter* painter, bool sentByMe, QStyleOptionViewItem& option) const;
|
||||
int paintPreview(const Models::FeedItem& data, QPainter* painter, QStyleOptionViewItem& option) const;
|
||||
int paintComment(const Models::FeedItem& data, QPainter* painter, QStyleOptionViewItem& option) const;
|
||||
int paintBody(const Models::FeedItem& data, QPainter* painter, QStyleOptionViewItem& option) const;
|
||||
void paintAvatar(const Models::FeedItem& data, const QModelIndex& index, const QStyleOptionViewItem& option, QPainter* painter) const;
|
||||
void paintBubble(const Models::FeedItem& data, QPainter* painter, const QStyleOptionViewItem& option) const;
|
||||
|
||||
QPushButton* getButton(const Models::FeedItem& data) const;
|
||||
QProgressBar* getBar(const Models::FeedItem& data) const;
|
||||
QLabel* getStatusIcon(const Models::FeedItem& data) const;
|
||||
QLabel* getPencilIcon(const Models::FeedItem& data) const;
|
||||
QLabel* getBody(const Models::FeedItem& data) const;
|
||||
QTextBrowser* getBody(const Models::FeedItem& data) const;
|
||||
void clearHelperWidget(const Models::FeedItem& data) const;
|
||||
|
||||
bool needToDrawAvatar(const QModelIndex& index, const Models::FeedItem& data, const QStyleOptionViewItem& option) const;
|
||||
@ -95,7 +98,7 @@ private:
|
||||
QFont nickFont;
|
||||
QFont dateFont;
|
||||
QFontMetrics bodyMetrics;
|
||||
TextMeter bodyMeter;
|
||||
QTextDocument* bodyRenderer;
|
||||
QFontMetrics nickMetrics;
|
||||
QFontMetrics dateMetrics;
|
||||
|
||||
@ -107,7 +110,7 @@ private:
|
||||
std::map<QString, QProgressBar*>* bars;
|
||||
std::map<QString, QLabel*>* statusIcons;
|
||||
std::map<QString, QLabel*>* pencilIcons;
|
||||
std::map<QString, QLabel*>* bodies;
|
||||
std::map<QString, QTextBrowser*>* bodies;
|
||||
std::map<QString, Preview*>* previews;
|
||||
std::set<QString>* idsToKeep;
|
||||
bool clearingWidgets;
|
||||
|
Loading…
Reference in New Issue
Block a user