575 lines
17 KiB
C++
575 lines
17 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop 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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It 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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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014 John Preston, https://desktop.telegram.org
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*/
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#include "stdafx.h"
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#include "style.h"
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#include "flattextarea.h"
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#include "window.h"
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FlatTextarea::FlatTextarea(QWidget *parent, const style::flatTextarea &st, const QString &pholder, const QString &v) : QTextEdit(v, parent),
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_ph(pholder), _oldtext(v), _phVisible(!v.length()),
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a_phLeft(_phVisible ? 0 : st.phShift), a_phAlpha(_phVisible ? 1 : 0), a_phColor(st.phColor->c),
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_st(st), _undoAvailable(false), _redoAvailable(false), _fakeMargin(0),
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_touchPress(false), _touchRightButton(false), _touchMove(false), _replacingEmojis(false) {
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setAcceptRichText(false);
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resize(_st.width, _st.font->height);
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setFont(_st.font->f);
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setAlignment(_st.align);
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_phelided = _st.font->m.elidedText(_ph, Qt::ElideRight, width() - _st.textMrg.left() - _st.textMrg.right() - _st.phPos.x() - 1);
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QPalette p(palette());
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p.setColor(QPalette::Text, _st.textColor->c);
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setPalette(p);
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setFrameStyle(QFrame::NoFrame | QFrame::Plain);
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viewport()->setAutoFillBackground(false);
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setContentsMargins(0, 0, 0, 0);
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switch (cScale()) {
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case dbisOneAndQuarter: _fakeMargin = 1; break;
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case dbisOneAndHalf: _fakeMargin = 2; break;
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case dbisTwo: _fakeMargin = 4; break;
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}
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setStyleSheet(qsl("QTextEdit { margin: %1px; }").arg(_fakeMargin));
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viewport()->setAttribute(Qt::WA_AcceptTouchEvents);
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_touchTimer.setSingleShot(true);
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connect(&_touchTimer, SIGNAL(timeout()), this, SLOT(onTouchTimer()));
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connect(document(), SIGNAL(contentsChange(int, int, int)), this, SLOT(onDocumentContentsChange(int, int, int)));
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connect(document(), SIGNAL(contentsChanged()), this, SLOT(onDocumentContentsChanged()));
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connect(this, SIGNAL(undoAvailable(bool)), this, SLOT(onUndoAvailable(bool)));
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connect(this, SIGNAL(redoAvailable(bool)), this, SLOT(onRedoAvailable(bool)));
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if (App::wnd()) connect(this, SIGNAL(selectionChanged()), App::wnd(), SLOT(updateGlobalMenu()));
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}
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void FlatTextarea::onTouchTimer() {
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_touchRightButton = true;
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}
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bool FlatTextarea::viewportEvent(QEvent *e) {
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if (e->type() == QEvent::TouchBegin || e->type() == QEvent::TouchUpdate || e->type() == QEvent::TouchEnd || e->type() == QEvent::TouchCancel) {
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QTouchEvent *ev = static_cast<QTouchEvent*>(e);
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if (ev->device()->type() == QTouchDevice::TouchScreen) {
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touchEvent(ev);
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return QTextEdit::viewportEvent(e);
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}
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}
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return QTextEdit::viewportEvent(e);
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}
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void FlatTextarea::touchEvent(QTouchEvent *e) {
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switch (e->type()) {
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case QEvent::TouchBegin:
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if (_touchPress || e->touchPoints().isEmpty()) return;
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_touchTimer.start(QApplication::startDragTime());
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_touchPress = true;
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_touchMove = _touchRightButton = false;
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_touchStart = e->touchPoints().cbegin()->screenPos().toPoint();
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break;
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case QEvent::TouchUpdate:
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if (!_touchPress || e->touchPoints().isEmpty()) return;
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if (!_touchMove && (e->touchPoints().cbegin()->screenPos().toPoint() - _touchStart).manhattanLength() >= QApplication::startDragDistance()) {
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_touchMove = true;
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}
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break;
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case QEvent::TouchEnd:
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if (!_touchPress) return;
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if (!_touchMove && window()) {
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Qt::MouseButton btn(_touchRightButton ? Qt::RightButton : Qt::LeftButton);
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QPoint mapped(mapFromGlobal(_touchStart)), winMapped(window()->mapFromGlobal(_touchStart));
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if (_touchRightButton) {
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QContextMenuEvent contextEvent(QContextMenuEvent::Mouse, mapped, _touchStart);
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contextMenuEvent(&contextEvent);
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}
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}
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_touchTimer.stop();
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_touchPress = _touchMove = _touchRightButton = false;
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break;
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case QEvent::TouchCancel:
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_touchPress = false;
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_touchTimer.stop();
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break;
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}
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}
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QRect FlatTextarea::getTextRect() const {
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return rect().marginsRemoved(_st.textMrg + st::textRectMargins);
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}
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int32 FlatTextarea::fakeMargin() const {
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return _fakeMargin;
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}
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void FlatTextarea::paintEvent(QPaintEvent *e) {
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QPainter p(viewport());
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p.fillRect(rect(), _st.bgColor->b);
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bool phDraw = _phVisible;
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if (animating()) {
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p.setOpacity(a_phAlpha.current());
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phDraw = true;
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}
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if (phDraw) {
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p.save();
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p.setClipRect(rect());
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QRect phRect(_st.textMrg.left() - _fakeMargin + _st.phPos.x() + a_phLeft.current(), _st.textMrg.top() - _fakeMargin + _st.phPos.y(), width() - _st.textMrg.left() - _st.textMrg.right(), height() - _st.textMrg.top() - _st.textMrg.bottom());
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p.setFont(_st.font->f);
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p.setPen(a_phColor.current());
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p.drawText(phRect, _ph, QTextOption(_st.phAlign));
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p.restore();
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}
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QTextEdit::paintEvent(e);
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}
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void FlatTextarea::focusInEvent(QFocusEvent *e) {
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a_phColor.start(_st.phFocusColor->c);
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anim::start(this);
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QTextEdit::focusInEvent(e);
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}
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void FlatTextarea::focusOutEvent(QFocusEvent *e) {
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a_phColor.start(_st.phColor->c);
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anim::start(this);
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QTextEdit::focusOutEvent(e);
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}
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QSize FlatTextarea::sizeHint() const {
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return geometry().size();
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}
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QSize FlatTextarea::minimumSizeHint() const {
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return geometry().size();
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}
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EmojiPtr FlatTextarea::getSingleEmoji() const {
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QString text;
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QTextFragment fragment;
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getSingleEmojiFragment(text, fragment);
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if (!text.isEmpty()) {
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QTextCharFormat format = fragment.charFormat();
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QString imageName = static_cast<const QTextImageFormat*>(&format)->name();
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return getEmoji(imageName.mid(8).toUInt(0, 16));
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}
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return 0;
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}
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void FlatTextarea::getSingleEmojiFragment(QString &text, QTextFragment &fragment) const {
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int32 end = textCursor().position(), start = end - 1;
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if (textCursor().anchor() != end) return;
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if (start < 0) start = 0;
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QTextDocument *doc(document());
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QTextBlock from = doc->findBlock(start), till = doc->findBlock(end);
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if (till.isValid()) till = till.next();
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for (QTextBlock b = from; b != till; b = b.next()) {
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for (QTextBlock::Iterator iter = b.begin(); !iter.atEnd(); ++iter) {
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QTextFragment fr(iter.fragment());
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if (!fr.isValid()) continue;
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int32 p = fr.position(), e = (p + fr.length());
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if (p >= end || e <= start) {
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continue;
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}
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QTextCharFormat f = fr.charFormat();
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QString t(fr.text());
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if (p < start) {
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t = t.mid(start - p, end - start);
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} else if (e > end) {
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t = t.mid(0, end - p);
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}
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if (f.isImageFormat() && !t.isEmpty() && t.at(0).unicode() == QChar::ObjectReplacementCharacter) {
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QString imageName = static_cast<QTextImageFormat*>(&f)->name();
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if (imageName.midRef(0, 8) == qsl("emoji://")) {
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fragment = fr;
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text = t;
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return;
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}
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}
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return;
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}
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}
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return;
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}
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void FlatTextarea::removeSingleEmoji() {
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QString text;
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QTextFragment fragment;
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getSingleEmojiFragment(text, fragment);
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if (!text.isEmpty()) {
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QTextCursor t(textCursor());
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t.setPosition(fragment.position());
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t.setPosition(fragment.position() + fragment.length(), QTextCursor::KeepAnchor);
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t.removeSelectedText();
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setTextCursor(t);
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}
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}
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QString FlatTextarea::getText(int32 start, int32 end) const {
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if (end >= 0 && end <= start) return QString();
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if (start < 0) start = 0;
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bool full = (start == 0) && (end < 0);
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QTextDocument *doc(document());
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QTextBlock from = full ? doc->begin() : doc->findBlock(start), till = (end < 0) ? doc->end() : doc->findBlock(end);
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if (till.isValid()) till = till.next();
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int32 possibleLen = 0;
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for (QTextBlock b = from; b != till; b = b.next()) {
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possibleLen += b.length();
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}
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QString result;
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result.reserve(possibleLen + 1);
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if (!full && end < 0) {
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end = possibleLen;
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}
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for (QTextBlock b = from; b != till; b = b.next()) {
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for (QTextBlock::Iterator iter = b.begin(); !iter.atEnd(); ++iter) {
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QTextFragment fragment(iter.fragment());
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if (!fragment.isValid()) continue;
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int32 p = full ? 0 : fragment.position(), e = full ? 0 : (p + fragment.length());
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if (!full) {
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if (p >= end || e <= start) {
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continue;
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}
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}
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QTextCharFormat f = fragment.charFormat();
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QString emojiText;
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QString t(fragment.text());
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if (!full) {
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if (p < start) {
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t = t.mid(start - p, end - start);
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} else if (e > end) {
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t = t.mid(0, end - p);
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}
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}
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QChar *ub = t.data(), *uc = ub, *ue = uc + t.size();
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for (; uc != ue; ++uc) {
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switch (uc->unicode()) {
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case 0xfdd0: // QTextBeginningOfFrame
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case 0xfdd1: // QTextEndOfFrame
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case QChar::ParagraphSeparator:
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case QChar::LineSeparator:
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*uc = QLatin1Char('\n');
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break;
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case QChar::Nbsp:
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*uc = QLatin1Char(' ');
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break;
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case QChar::ObjectReplacementCharacter:
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if (emojiText.isEmpty() && f.isImageFormat()) {
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QString imageName = static_cast<QTextImageFormat*>(&f)->name();
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if (imageName.midRef(0, 8) == qsl("emoji://")) {
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uint32 index = imageName.mid(8).toUInt(0, 16);
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const EmojiData *emoji = getEmoji(index);
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if (emoji) {
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emojiText = textEmojiString(emoji);
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}
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}
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}
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if (uc > ub) result.append(ub, uc - ub);
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if (!emojiText.isEmpty()) result.append(emojiText);
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ub = uc + 1;
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break;
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}
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}
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if (uc > ub) result.append(ub, uc - ub);
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}
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result.append('\n');
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}
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result.chop(1);
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return result;
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}
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bool FlatTextarea::hasText() const {
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QTextDocument *doc(document());
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QTextBlock from = doc->begin(), till = doc->end();
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if (from == till) return false;
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for (QTextBlock::Iterator iter = from.begin(); !iter.atEnd(); ++iter) {
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QTextFragment fragment(iter.fragment());
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if (!fragment.isValid()) continue;
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if (!fragment.text().isEmpty()) return true;
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}
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return (from.next() != till);
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}
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bool FlatTextarea::isUndoAvailable() const {
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return _undoAvailable;
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}
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bool FlatTextarea::isRedoAvailable() const {
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return _redoAvailable;
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}
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void FlatTextarea::insertEmoji(EmojiPtr emoji, QTextCursor c) {
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c.removeSelectedText();
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QPixmap img(App::emojiSingle(emoji, _st.font->height));
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QString url = qsl("emoji://") + QString::number(emoji->code, 16);
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document()->addResource(QTextDocument::ImageResource, QUrl(url), QVariant(img));
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QTextImageFormat imageFormat;
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imageFormat.setWidth(img.width() / cIntRetinaFactor());
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imageFormat.setHeight(img.height() / cIntRetinaFactor());
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imageFormat.setName(url);
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imageFormat.setVerticalAlignment(QTextCharFormat::AlignBaseline);
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c.insertImage(imageFormat);
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}
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void FlatTextarea::processDocumentContentsChange(int position, int charsAdded) {
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int32 emojiPosition = 0, emojiLen = 0;
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const EmojiData *emoji = 0;
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QTextDocument *doc(document());
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while (true) {
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int32 start = position, end = position + charsAdded;
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QTextBlock from = doc->findBlock(start), till = doc->findBlock(end);
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if (till.isValid()) till = till.next();
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for (QTextBlock b = from; b != till; b = b.next()) {
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for (QTextBlock::Iterator iter = b.begin(); !iter.atEnd(); ++iter) {
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QTextFragment fragment(iter.fragment());
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if (!fragment.isValid()) continue;
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int32 p = fragment.position(), e = p + fragment.length();
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if (p >= end || e <= start) {
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continue;
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}
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QString t(fragment.text());
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for (const QChar *ch = t.constData(), *e = ch + t.size(); ch != e; ++ch) {
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if (ch + 1 < e && (ch->isHighSurrogate() || (((ch->unicode() >= 48 && ch->unicode() < 58) || ch->unicode() == 35) && (ch + 1)->unicode() == 0x20E3))) {
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emoji = getEmoji((ch->unicode() << 16) | (ch + 1)->unicode());
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if (emoji) {
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if (emoji->len == 4 && (ch + 3 >= e || ((uint32((ch + 2)->unicode()) << 16) | uint32((ch + 3)->unicode())) != emoji->code2)) {
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emoji = 0;
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} else {
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emojiPosition = p + (ch - t.constData());
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emojiLen = emoji->len + ((ch + emoji->len < e && (ch + emoji->len)->unicode() == 0xFE0F) ? 1 : 0);
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break;
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}
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}
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++ch;
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} else {
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emoji = getEmoji(ch->unicode());
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if (emoji) {
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emojiPosition = p + (ch - t.constData());
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emojiLen = emoji->len + ((ch + emoji->len < e && (ch + emoji->len)->unicode() == 0xFE0F) ? 1 : 0);
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break;
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}
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}
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}
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if (emoji) break;
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}
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if (emoji) break;
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}
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if (emoji) {
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QTextCursor c(doc->docHandle(), emojiPosition);
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c.setPosition(emojiPosition + emojiLen, QTextCursor::KeepAnchor);
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int32 removedUpto = c.position();
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insertEmoji(emoji, c);
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for (Insertions::iterator i = _insertions.begin(), e = _insertions.end(); i != e; ++i) {
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if (i->first >= removedUpto) {
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i->first -= removedUpto - emojiPosition - 1;
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} else if (i->first >= emojiPosition) {
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i->second -= removedUpto - emojiPosition;
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i->first = emojiPosition + 1;
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} else if (i->first + i->second > emojiPosition + 1) {
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i->second -= qMin(removedUpto, i->first + i->second) - emojiPosition;
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}
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}
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charsAdded -= removedUpto - position;
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position = emojiPosition + 1;
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emoji = 0;
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emojiPosition = 0;
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} else {
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break;
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}
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}
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}
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void FlatTextarea::onDocumentContentsChange(int position, int charsRemoved, int charsAdded) {
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if (_replacingEmojis || document()->availableRedoSteps() > 0) return;
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const int takeBack = 3;
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position -= takeBack;
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charsAdded += takeBack;
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if (position < 0) {
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charsAdded += position;
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position = 0;
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}
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if (charsAdded <= 0) return;
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_insertions.push_back(Insertion(position, charsAdded));
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}
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void FlatTextarea::onDocumentContentsChanged() {
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if (_replacingEmojis) return;
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if (!_insertions.isEmpty()) {
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if (document()->availableRedoSteps() > 0) {
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_insertions.clear();
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} else {
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_replacingEmojis = true;
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do {
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Insertion i = _insertions.front();
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_insertions.pop_front();
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if (i.second > 0) {
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processDocumentContentsChange(i.first, i.second);
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}
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} while (!_insertions.isEmpty());
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_replacingEmojis = false;
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}
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}
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QString curText(getText());
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if (_oldtext != curText) {
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_oldtext = curText;
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emit changed();
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}
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updatePlaceholder();
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if (App::wnd()) App::wnd()->updateGlobalMenu();
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}
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void FlatTextarea::onUndoAvailable(bool avail) {
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_undoAvailable = avail;
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if (App::wnd()) App::wnd()->updateGlobalMenu();
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}
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void FlatTextarea::onRedoAvailable(bool avail) {
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_redoAvailable = avail;
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if (App::wnd()) App::wnd()->updateGlobalMenu();
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}
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bool FlatTextarea::animStep(float64 ms) {
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float dt = ms / _st.phDuration;
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bool res = true;
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if (dt >= 1) {
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res = false;
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a_phLeft.finish();
|
|
a_phAlpha.finish();
|
|
a_phColor.finish();
|
|
a_phLeft = anim::ivalue(a_phLeft.current());
|
|
a_phAlpha = anim::fvalue(a_phAlpha.current());
|
|
a_phColor = anim::cvalue(a_phColor.current());
|
|
} else {
|
|
a_phLeft.update(dt, _st.phLeftFunc);
|
|
a_phAlpha.update(dt, _st.phAlphaFunc);
|
|
a_phColor.update(dt, _st.phColorFunc);
|
|
}
|
|
update();
|
|
return res;
|
|
}
|
|
|
|
void FlatTextarea::updatePlaceholder() {
|
|
bool vis = !hasText();
|
|
if (vis == _phVisible) return;
|
|
|
|
a_phLeft.start(vis ? 0 : _st.phShift);
|
|
a_phAlpha.start(vis ? 1 : 0);
|
|
anim::start(this);
|
|
|
|
_phVisible = vis;
|
|
}
|
|
|
|
QMimeData *FlatTextarea::createMimeDataFromSelection() const {
|
|
QMimeData *result = new QMimeData();
|
|
QTextCursor c(textCursor());
|
|
int32 start = c.selectionStart(), end = c.selectionEnd();
|
|
if (end > start) {
|
|
result->setText(getText(start, end));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void FlatTextarea::keyPressEvent(QKeyEvent *e) {
|
|
bool shift = e->modifiers().testFlag(Qt::ShiftModifier);
|
|
bool ctrl = e->modifiers().testFlag(Qt::ControlModifier) || e->modifiers().testFlag(Qt::MetaModifier), ctrlGood = (ctrl && cCtrlEnter()) || (!ctrl && !shift && !cCtrlEnter()) || (ctrl && shift);
|
|
bool enter = (e->key() == Qt::Key_Enter || e->key() == Qt::Key_Return);
|
|
|
|
if (enter && ctrlGood) {
|
|
emit submitted(ctrl && shift);
|
|
} else if (e->key() == Qt::Key_Escape) {
|
|
emit cancelled();
|
|
} else if (e->key() == Qt::Key_Tab || (ctrl && e->key() == Qt::Key_Backtab)) {
|
|
if (ctrl) {
|
|
e->ignore();
|
|
} else {
|
|
emit tabbed();
|
|
}
|
|
} else {
|
|
QTextCursor tc(textCursor());
|
|
if (enter && ctrl) {
|
|
e->setModifiers(e->modifiers() & ~Qt::ControlModifier);
|
|
}
|
|
QTextEdit::keyPressEvent(e);
|
|
if (tc == textCursor()) {
|
|
bool check = false;
|
|
if (e->key() == Qt::Key_PageUp || e->key() == Qt::Key_Up) {
|
|
tc.movePosition(QTextCursor::Start, e->modifiers().testFlag(Qt::ShiftModifier) ? QTextCursor::KeepAnchor : QTextCursor::MoveAnchor);
|
|
check = true;
|
|
} else if (e->key() == Qt::Key_PageDown || e->key() == Qt::Key_Down) {
|
|
tc.movePosition(QTextCursor::End, e->modifiers().testFlag(Qt::ShiftModifier) ? QTextCursor::KeepAnchor : QTextCursor::MoveAnchor);
|
|
check = true;
|
|
}
|
|
if (check) {
|
|
if (tc == textCursor()) {
|
|
e->ignore();
|
|
} else {
|
|
setTextCursor(tc);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void FlatTextarea::resizeEvent(QResizeEvent *e) {
|
|
_phelided = _st.font->m.elidedText(_ph, Qt::ElideRight, width() - _st.textMrg.left() - _st.textMrg.right() - _st.phPos.x() - 1);
|
|
QTextEdit::resizeEvent(e);
|
|
}
|
|
|
|
void FlatTextarea::mousePressEvent(QMouseEvent *e) {
|
|
QTextEdit::mousePressEvent(e);
|
|
}
|