623 lines
18 KiB
C++
623 lines
18 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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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
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*/
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#include "stdafx.h"
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#include "ui/flatlabel.h"
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#include "mainwindow.h"
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#include "lang.h"
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namespace {
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TextParseOptions _labelOptions = {
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TextParseMultiline, // flags
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0, // maxw
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0, // maxh
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Qt::LayoutDirectionAuto, // dir
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};
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TextParseOptions _labelMarkedOptions = {
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TextParseMultiline | TextParseLinks | TextParseHashtags | TextParseMentions | TextParseBotCommands, // flags
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0, // maxw
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0, // maxh
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Qt::LayoutDirectionAuto, // dir
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};
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}
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FlatLabel::FlatLabel(QWidget *parent, const style::flatLabel &st, const style::textStyle &tst) : TWidget(parent)
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, _text(st.width ? st.width : QFIXED_MAX)
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, _st(st)
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, _tst(tst)
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, _contextCopyText(lang(lng_context_copy_text)) {
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init();
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}
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FlatLabel::FlatLabel(QWidget *parent, const QString &text, InitType initType, const style::flatLabel &st, const style::textStyle &tst) : TWidget(parent)
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, _text(st.width ? st.width : QFIXED_MAX)
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, _st(st)
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, _tst(tst)
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, _contextCopyText(lang(lng_context_copy_text)) {
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if (initType == InitType::Rich) {
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setRichText(text);
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} else {
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setText(text);
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}
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init();
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}
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void FlatLabel::init() {
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_trippleClickTimer.setSingleShot(true);
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_touchSelectTimer.setSingleShot(true);
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connect(&_touchSelectTimer, SIGNAL(timeout()), this, SLOT(onTouchSelect()));
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}
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void FlatLabel::setText(const QString &text) {
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textstyleSet(&_tst);
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_text.setText(_st.font, text, _labelOptions);
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refreshSize();
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textstyleRestore();
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setMouseTracking(_selectable || _text.hasLinks());
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}
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void FlatLabel::setRichText(const QString &text) {
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textstyleSet(&_tst);
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_text.setRichText(_st.font, text, _labelOptions);
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refreshSize();
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textstyleRestore();
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setMouseTracking(_selectable || _text.hasLinks());
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}
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void FlatLabel::setMarkedText(const TextWithEntities &textWithEntities) {
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textstyleSet(&_tst);
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_text.setMarkedText(_st.font, textWithEntities, _labelMarkedOptions);
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refreshSize();
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textstyleRestore();
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setMouseTracking(_selectable || _text.hasLinks());
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}
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void FlatLabel::setSelectable(bool selectable) {
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_selectable = selectable;
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setMouseTracking(_selectable || _text.hasLinks());
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}
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void FlatLabel::setDoubleClickSelectsParagraph(bool doubleClickSelectsParagraph) {
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_doubleClickSelectsParagraph = doubleClickSelectsParagraph;
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}
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void FlatLabel::setContextCopyText(const QString ©Text) {
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_contextCopyText = copyText;
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}
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void FlatLabel::setExpandLinksMode(ExpandLinksMode mode) {
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_contextExpandLinksMode = mode;
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}
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void FlatLabel::setBreakEverywhere(bool breakEverywhere) {
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_breakEverywhere = breakEverywhere;
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}
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void FlatLabel::resizeToWidth(int32 width) {
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textstyleSet(&_tst);
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_allowedWidth = width;
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refreshSize();
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textstyleRestore();
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}
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int FlatLabel::naturalWidth() const {
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return _text.maxWidth();
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}
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int FlatLabel::countTextWidth() const {
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return _allowedWidth ? (_allowedWidth - _st.margin.left() - _st.margin.right()) : (_st.width ? _st.width : _text.maxWidth());
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}
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int FlatLabel::countTextHeight(int textWidth) {
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_fullTextHeight = _text.countHeight(textWidth);
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return _st.maxHeight ? qMin(_fullTextHeight, _st.maxHeight) : _fullTextHeight;
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}
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void FlatLabel::refreshSize() {
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int textWidth = countTextWidth();
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int textHeight = countTextHeight(textWidth);
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int fullWidth = _st.margin.left() + textWidth + _st.margin.right();
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int fullHeight = _st.margin.top() + textHeight + _st.margin.bottom();
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resize(fullWidth, fullHeight);
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}
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void FlatLabel::setLink(uint16 lnkIndex, const ClickHandlerPtr &lnk) {
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_text.setLink(lnkIndex, lnk);
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}
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void FlatLabel::setClickHandlerHook(ClickHandlerHook &&hook) {
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_clickHandlerHook = std_::move(hook);
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}
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void FlatLabel::mouseMoveEvent(QMouseEvent *e) {
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_lastMousePos = e->globalPos();
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dragActionUpdate();
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}
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void FlatLabel::mousePressEvent(QMouseEvent *e) {
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if (_contextMenu) {
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e->accept();
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return; // ignore mouse press, that was hiding context menu
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}
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dragActionStart(e->globalPos(), e->button());
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}
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Text::StateResult FlatLabel::dragActionStart(const QPoint &p, Qt::MouseButton button) {
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_lastMousePos = p;
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auto state = dragActionUpdate();
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if (button != Qt::LeftButton) return state;
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ClickHandler::pressed();
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_dragAction = NoDrag;
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_dragWasInactive = App::wnd()->inactivePress();
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if (_dragWasInactive) App::wnd()->inactivePress(false);
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if (ClickHandler::getPressed()) {
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_dragStartPosition = mapFromGlobal(_lastMousePos);
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_dragAction = PrepareDrag;
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}
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if (!_selectable || _dragAction != NoDrag) {
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return state;
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}
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if (_trippleClickTimer.isActive() && (_lastMousePos - _trippleClickPoint).manhattanLength() < QApplication::startDragDistance()) {
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if (state.uponSymbol) {
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_selection = { state.symbol, state.symbol };
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_savedSelection = { 0, 0 };
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_dragSymbol = state.symbol;
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_dragAction = Selecting;
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_selectionType = TextSelectType::Paragraphs;
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updateHover(state);
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_trippleClickTimer.start(QApplication::doubleClickInterval());
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update();
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}
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}
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if (_selectionType != TextSelectType::Paragraphs) {
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_dragSymbol = state.symbol;
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bool uponSelected = state.uponSymbol;
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if (uponSelected) {
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if (_dragSymbol < _selection.from || _dragSymbol >= _selection.to) {
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uponSelected = false;
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}
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}
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if (uponSelected) {
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_dragStartPosition = mapFromGlobal(_lastMousePos);
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_dragAction = PrepareDrag; // start text drag
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} else if (!_dragWasInactive) {
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if (state.afterSymbol) ++_dragSymbol;
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_selection = { _dragSymbol, _dragSymbol };
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_savedSelection = { 0, 0 };
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_dragAction = Selecting;
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update();
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}
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}
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return state;
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}
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Text::StateResult FlatLabel::dragActionFinish(const QPoint &p, Qt::MouseButton button) {
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_lastMousePos = p;
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auto state = dragActionUpdate();
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ClickHandlerPtr activated = ClickHandler::unpressed();
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if (_dragAction == Dragging) {
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activated.clear();
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} else if (_dragAction == PrepareDrag) {
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_selection = { 0, 0 };
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_savedSelection = { 0, 0 };
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update();
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}
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_dragAction = NoDrag;
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_selectionType = TextSelectType::Letters;
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if (activated) {
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if (_clickHandlerHook.isNull() || _clickHandlerHook.call(activated, button)) {
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App::activateClickHandler(activated, button);
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}
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}
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#if defined Q_OS_LINUX32 || defined Q_OS_LINUX64
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if (!_selection.empty()) {
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QApplication::clipboard()->setText(_text.originalText(_selection, _contextExpandLinksMode), QClipboard::Selection);
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}
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#endif // Q_OS_LINUX32 || Q_OS_LINUX64
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return state;
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}
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void FlatLabel::mouseReleaseEvent(QMouseEvent *e) {
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dragActionFinish(e->globalPos(), e->button());
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if (!rect().contains(e->pos())) {
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leaveEvent(e);
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}
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}
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void FlatLabel::mouseDoubleClickEvent(QMouseEvent *e) {
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auto state = dragActionStart(e->globalPos(), e->button());
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if (((_dragAction == Selecting) || (_dragAction == NoDrag)) && _selectionType == TextSelectType::Letters) {
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if (state.uponSymbol) {
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_dragSymbol = state.symbol;
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_selectionType = _doubleClickSelectsParagraph ? TextSelectType::Paragraphs : TextSelectType::Words;
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if (_dragAction == NoDrag) {
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_dragAction = Selecting;
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_selection = { state.symbol, state.symbol };
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_savedSelection = { 0, 0 };
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}
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mouseMoveEvent(e);
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_trippleClickPoint = e->globalPos();
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_trippleClickTimer.start(QApplication::doubleClickInterval());
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}
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}
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}
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void FlatLabel::enterEvent(QEvent *e) {
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_lastMousePos = QCursor::pos();
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dragActionUpdate();
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}
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void FlatLabel::leaveEvent(QEvent *e) {
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ClickHandler::clearActive(this);
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}
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void FlatLabel::focusOutEvent(QFocusEvent *e) {
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if (!_selection.empty()) {
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if (_contextMenu) {
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_savedSelection = _selection;
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}
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_selection = { 0, 0 };
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update();
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}
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}
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void FlatLabel::focusInEvent(QFocusEvent *e) {
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if (!_savedSelection.empty()) {
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_selection = _savedSelection;
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_savedSelection = { 0, 0 };
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update();
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}
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}
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void FlatLabel::keyPressEvent(QKeyEvent *e) {
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e->ignore();
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if (e->key() == Qt::Key_Copy || (e->key() == Qt::Key_C && e->modifiers().testFlag(Qt::ControlModifier))) {
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if (!_selection.empty()) {
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onCopySelectedText();
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e->accept();
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}
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}
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}
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void FlatLabel::contextMenuEvent(QContextMenuEvent *e) {
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if (!_selectable) return;
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showContextMenu(e, ContextMenuReason::FromEvent);
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}
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bool FlatLabel::event(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 true;
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}
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}
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return QWidget::event(e);
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}
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void FlatLabel::touchEvent(QTouchEvent *e) {
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const Qt::TouchPointStates &states(e->touchPointStates());
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if (e->type() == QEvent::TouchCancel) { // cancel
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if (!_touchInProgress) return;
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_touchInProgress = false;
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_touchSelectTimer.stop();
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_touchSelect = false;
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_dragAction = NoDrag;
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return;
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}
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if (!e->touchPoints().isEmpty()) {
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_touchPrevPos = _touchPos;
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_touchPos = e->touchPoints().cbegin()->screenPos().toPoint();
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}
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switch (e->type()) {
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case QEvent::TouchBegin:
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if (_contextMenu) {
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e->accept();
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return; // ignore mouse press, that was hiding context menu
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}
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if (_touchInProgress) return;
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if (e->touchPoints().isEmpty()) return;
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_touchInProgress = true;
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_touchSelectTimer.start(QApplication::startDragTime());
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_touchSelect = false;
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_touchStart = _touchPrevPos = _touchPos;
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break;
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case QEvent::TouchUpdate:
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if (!_touchInProgress) return;
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if (_touchSelect) {
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_lastMousePos = _touchPos;
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dragActionUpdate();
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}
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break;
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case QEvent::TouchEnd:
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if (!_touchInProgress) return;
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_touchInProgress = false;
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if (_touchSelect) {
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dragActionFinish(_touchPos, Qt::RightButton);
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QContextMenuEvent contextMenu(QContextMenuEvent::Mouse, mapFromGlobal(_touchPos), _touchPos);
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showContextMenu(&contextMenu, ContextMenuReason::FromTouch);
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} else { // one short tap -- like mouse click
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dragActionStart(_touchPos, Qt::LeftButton);
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dragActionFinish(_touchPos, Qt::LeftButton);
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}
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_touchSelectTimer.stop();
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_touchSelect = false;
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break;
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}
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}
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void FlatLabel::showContextMenu(QContextMenuEvent *e, ContextMenuReason reason) {
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if (_contextMenu) {
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_contextMenu->deleteLater();
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_contextMenu = nullptr;
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}
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if (e->reason() == QContextMenuEvent::Mouse) {
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_lastMousePos = e->globalPos();
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} else {
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_lastMousePos = QCursor::pos();
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}
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auto state = dragActionUpdate();
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bool hasSelection = !_selection.empty();
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bool uponSelection = state.uponSymbol && (state.symbol >= _selection.from) && (state.symbol < _selection.to);
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bool fullSelection = _text.isFullSelection(_selection);
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if (reason == ContextMenuReason::FromTouch && hasSelection && !uponSelection) {
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uponSelection = hasSelection;
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}
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_contextMenu = new PopupMenu();
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_contextMenuClickHandler = ClickHandler::getActive();
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if (fullSelection && !_contextCopyText.isEmpty()) {
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_contextMenu->addAction(_contextCopyText, this, SLOT(onCopyContextText()))->setEnabled(true);
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} else if (uponSelection && !fullSelection) {
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_contextMenu->addAction(lang(lng_context_copy_selected), this, SLOT(onCopySelectedText()))->setEnabled(true);
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} else if (!hasSelection && !_contextCopyText.isEmpty()) {
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_contextMenu->addAction(_contextCopyText, this, SLOT(onCopyContextText()))->setEnabled(true);
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}
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QString linkCopyToClipboardText = _contextMenuClickHandler ? _contextMenuClickHandler->copyToClipboardContextItemText() : QString();
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if (!linkCopyToClipboardText.isEmpty()) {
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_contextMenu->addAction(linkCopyToClipboardText, this, SLOT(onCopyContextUrl()))->setEnabled(true);
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}
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if (_contextMenu->actions().isEmpty()) {
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delete _contextMenu;
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_contextMenu = nullptr;
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} else {
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connect(_contextMenu, SIGNAL(destroyed(QObject*)), this, SLOT(onContextMenuDestroy(QObject*)));
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_contextMenu->popup(e->globalPos());
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e->accept();
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}
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}
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void FlatLabel::onCopySelectedText() {
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auto selection = _selection.empty() ? (_contextMenu ? _savedSelection : _selection) : _selection;
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if (!selection.empty()) {
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QApplication::clipboard()->setText(_text.originalText(selection, _contextExpandLinksMode));
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}
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}
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void FlatLabel::onCopyContextText() {
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QApplication::clipboard()->setText(_text.originalText({ 0, 0xFFFF }, _contextExpandLinksMode));
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}
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void FlatLabel::onCopyContextUrl() {
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if (_contextMenuClickHandler) {
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_contextMenuClickHandler->copyToClipboard();
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}
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}
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void FlatLabel::onTouchSelect() {
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_touchSelect = true;
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dragActionStart(_touchPos, Qt::LeftButton);
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}
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void FlatLabel::onContextMenuDestroy(QObject *obj) {
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if (obj == _contextMenu) {
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_contextMenu = nullptr;
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}
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}
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void FlatLabel::onExecuteDrag() {
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if (_dragAction != Dragging) return;
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auto state = getTextState(_dragStartPosition);
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bool uponSelected = state.uponSymbol && _selection.from <= state.symbol;
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if (uponSelected) {
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if (_dragSymbol < _selection.from || _dragSymbol >= _selection.to) {
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uponSelected = false;
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}
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}
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ClickHandlerPtr pressedHandler = ClickHandler::getPressed();
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QString selectedText;
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if (uponSelected) {
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selectedText = _text.originalText(_selection, ExpandLinksAll);
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} else if (pressedHandler) {
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selectedText = pressedHandler->dragText();
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}
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if (!selectedText.isEmpty()) {
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auto mimeData = new QMimeData();
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mimeData->setText(selectedText);
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auto drag = new QDrag(App::wnd());
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drag->setMimeData(mimeData);
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drag->exec(Qt::CopyAction);
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// We don't receive mouseReleaseEvent when drag is finished.
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ClickHandler::unpressed();
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}
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}
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void FlatLabel::clickHandlerActiveChanged(const ClickHandlerPtr &action, bool active) {
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update();
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}
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void FlatLabel::clickHandlerPressedChanged(const ClickHandlerPtr &action, bool active) {
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update();
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}
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Text::StateResult FlatLabel::dragActionUpdate() {
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auto m = mapFromGlobal(_lastMousePos);
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auto state = getTextState(m);
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updateHover(state);
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if (_dragAction == PrepareDrag && (m - _dragStartPosition).manhattanLength() >= QApplication::startDragDistance()) {
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_dragAction = Dragging;
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QTimer::singleShot(1, this, SLOT(onExecuteDrag()));
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}
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return state;
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}
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void FlatLabel::updateHover(const Text::StateResult &state) {
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bool lnkChanged = ClickHandler::setActive(state.link, this);
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if (!_selectable) {
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refreshCursor(state.uponSymbol);
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return;
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}
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|
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Qt::CursorShape cur = style::cur_default;
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if (_dragAction == NoDrag) {
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if (state.link) {
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cur = style::cur_pointer;
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} else if (state.uponSymbol) {
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cur = style::cur_text;
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}
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} else {
|
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if (_dragAction == Selecting) {
|
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uint16 second = state.symbol;
|
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if (state.afterSymbol && _selectionType == TextSelectType::Letters) {
|
|
++second;
|
|
}
|
|
auto selection = _text.adjustSelection({ qMin(second, _dragSymbol), qMax(second, _dragSymbol) }, _selectionType);
|
|
if (_selection != selection) {
|
|
_selection = selection;
|
|
_savedSelection = { 0, 0 };
|
|
setFocus();
|
|
update();
|
|
}
|
|
} else if (_dragAction == Dragging) {
|
|
}
|
|
|
|
if (ClickHandler::getPressed()) {
|
|
cur = style::cur_pointer;
|
|
} else if (_dragAction == Selecting) {
|
|
cur = style::cur_text;
|
|
}
|
|
}
|
|
if (_dragAction == Selecting) {
|
|
// checkSelectingScroll();
|
|
} else {
|
|
// noSelectingScroll();
|
|
}
|
|
|
|
if (_dragAction == NoDrag && (lnkChanged || cur != _cursor)) {
|
|
setCursor(_cursor = cur);
|
|
}
|
|
}
|
|
|
|
void FlatLabel::refreshCursor(bool uponSymbol) {
|
|
if (_dragAction != NoDrag) {
|
|
return;
|
|
}
|
|
bool needTextCursor = _selectable && uponSymbol;
|
|
style::cursor newCursor = needTextCursor ? style::cur_text : style::cur_default;
|
|
if (ClickHandler::getActive()) {
|
|
newCursor = style::cur_pointer;
|
|
}
|
|
if (newCursor != _cursor) {
|
|
_cursor = newCursor;
|
|
setCursor(_cursor);
|
|
}
|
|
}
|
|
|
|
Text::StateResult FlatLabel::getTextState(const QPoint &m) const {
|
|
Text::StateRequestElided request;
|
|
request.align = _st.align;
|
|
if (_selectable) {
|
|
request.flags |= Text::StateRequest::Flag::LookupSymbol;
|
|
}
|
|
int textWidth = width() - _st.margin.left() - _st.margin.right();
|
|
|
|
textstyleSet(&_tst);
|
|
Text::StateResult state;
|
|
bool heightExceeded = _st.maxHeight && (_st.maxHeight < _fullTextHeight || textWidth < _text.maxWidth());
|
|
bool renderElided = _breakEverywhere || heightExceeded;
|
|
if (renderElided) {
|
|
auto lineHeight = qMax(_tst.lineHeight, _st.font->height);
|
|
auto lines = _st.maxHeight ? qMax(_st.maxHeight / lineHeight, 1) : ((height() / lineHeight) + 2);
|
|
request.lines = lines;
|
|
if (_breakEverywhere) {
|
|
request.flags |= Text::StateRequest::Flag::BreakEverywhere;
|
|
}
|
|
state = _text.getStateElided(m.x() - _st.margin.left(), m.y() - _st.margin.top(), textWidth, request);
|
|
} else {
|
|
state = _text.getState(m.x() - _st.margin.left(), m.y() - _st.margin.top(), textWidth, request);
|
|
}
|
|
textstyleRestore();
|
|
|
|
return state;
|
|
}
|
|
|
|
void FlatLabel::setOpacity(float64 o) {
|
|
_opacity = o;
|
|
update();
|
|
}
|
|
|
|
void FlatLabel::paintEvent(QPaintEvent *e) {
|
|
Painter p(this);
|
|
p.setOpacity(_opacity);
|
|
p.setPen(_st.textFg);
|
|
textstyleSet(&_tst);
|
|
int textWidth = width() - _st.margin.left() - _st.margin.right();
|
|
auto selection = _selection.empty() ? (_contextMenu ? _savedSelection : _selection) : _selection;
|
|
bool heightExceeded = _st.maxHeight && (_st.maxHeight < _fullTextHeight || textWidth < _text.maxWidth());
|
|
bool renderElided = _breakEverywhere || heightExceeded;
|
|
if (renderElided) {
|
|
auto lineHeight = qMax(_tst.lineHeight, _st.font->height);
|
|
auto lines = _st.maxHeight ? qMax(_st.maxHeight / lineHeight, 1) : ((height() / lineHeight) + 2);
|
|
_text.drawElided(p, _st.margin.left(), _st.margin.top(), textWidth, lines, _st.align, e->rect().y(), e->rect().bottom(), 0, _breakEverywhere, selection);
|
|
} else {
|
|
_text.draw(p, _st.margin.left(), _st.margin.top(), textWidth, _st.align, e->rect().y(), e->rect().bottom(), selection);
|
|
}
|
|
textstyleRestore();
|
|
}
|