461 lines
13 KiB
C++
461 lines
13 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) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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namespace Fonts {
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void Start();
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QString GetOverride(const QString &familyName);
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} // namespace
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class Painter : public QPainter {
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public:
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explicit Painter(QPaintDevice *device) : QPainter(device) {
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}
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void drawTextLeft(int x, int y, int outerw, const QString &text, int textWidth = -1) {
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QFontMetrics m(fontMetrics());
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if (rtl() && textWidth < 0) textWidth = m.width(text);
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drawText(rtl() ? (outerw - x - textWidth) : x, y + m.ascent(), text);
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}
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void drawTextRight(int x, int y, int outerw, const QString &text, int textWidth = -1) {
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QFontMetrics m(fontMetrics());
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if (!rtl() && textWidth < 0) textWidth = m.width(text);
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drawText(rtl() ? x : (outerw - x - textWidth), y + m.ascent(), text);
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}
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void drawPixmapLeft(int x, int y, int outerw, const QPixmap &pix, const QRect &from) {
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drawPixmap(QPoint(rtl() ? (outerw - x - (from.width() / pix.devicePixelRatio())) : x, y), pix, from);
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}
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void drawPixmapLeft(const QPoint &p, int outerw, const QPixmap &pix, const QRect &from) {
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return drawPixmapLeft(p.x(), p.y(), outerw, pix, from);
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}
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void drawPixmapLeft(int x, int y, int w, int h, int outerw, const QPixmap &pix, const QRect &from) {
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drawPixmap(QRect(rtl() ? (outerw - x - w) : x, y, w, h), pix, from);
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}
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void drawPixmapLeft(const QRect &r, int outerw, const QPixmap &pix, const QRect &from) {
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return drawPixmapLeft(r.x(), r.y(), r.width(), r.height(), outerw, pix, from);
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}
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void drawPixmapLeft(int x, int y, int outerw, const QPixmap &pix) {
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drawPixmap(QPoint(rtl() ? (outerw - x - (pix.width() / pix.devicePixelRatio())) : x, y), pix);
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}
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void drawPixmapLeft(const QPoint &p, int outerw, const QPixmap &pix) {
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return drawPixmapLeft(p.x(), p.y(), outerw, pix);
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}
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void drawPixmapRight(int x, int y, int outerw, const QPixmap &pix, const QRect &from) {
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drawPixmap(QPoint(rtl() ? x : (outerw - x - (from.width() / pix.devicePixelRatio())), y), pix, from);
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}
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void drawPixmapRight(const QPoint &p, int outerw, const QPixmap &pix, const QRect &from) {
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return drawPixmapRight(p.x(), p.y(), outerw, pix, from);
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}
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void drawPixmapRight(int x, int y, int w, int h, int outerw, const QPixmap &pix, const QRect &from) {
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drawPixmap(QRect(rtl() ? x : (outerw - x - w), y, w, h), pix, from);
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}
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void drawPixmapRight(const QRect &r, int outerw, const QPixmap &pix, const QRect &from) {
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return drawPixmapRight(r.x(), r.y(), r.width(), r.height(), outerw, pix, from);
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}
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void drawPixmapRight(int x, int y, int outerw, const QPixmap &pix) {
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drawPixmap(QPoint(rtl() ? x : (outerw - x - (pix.width() / pix.devicePixelRatio())), y), pix);
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}
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void drawPixmapRight(const QPoint &p, int outerw, const QPixmap &pix) {
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return drawPixmapRight(p.x(), p.y(), outerw, pix);
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}
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void setTextPalette(const style::TextPalette &palette) {
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_textPalette = &palette;
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}
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void restoreTextPalette() {
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_textPalette = nullptr;
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}
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const style::TextPalette &textPalette() const {
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return _textPalette ? *_textPalette : st::defaultTextPalette;
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}
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private:
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const style::TextPalette *_textPalette = nullptr;
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};
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class PainterHighQualityEnabler {
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public:
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PainterHighQualityEnabler(Painter &p) : _painter(p) {
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static constexpr QPainter::RenderHint Hints[] = {
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QPainter::Antialiasing,
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QPainter::SmoothPixmapTransform,
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QPainter::TextAntialiasing,
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QPainter::HighQualityAntialiasing
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};
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auto hints = _painter.renderHints();
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for_const (auto hint, Hints) {
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if (!(hints & hint)) {
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_hints |= hint;
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}
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}
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if (_hints) {
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_painter.setRenderHints(_hints);
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}
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}
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PainterHighQualityEnabler(const PainterHighQualityEnabler &other) = delete;
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PainterHighQualityEnabler &operator=(const PainterHighQualityEnabler &other) = delete;
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~PainterHighQualityEnabler() {
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if (_hints) {
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_painter.setRenderHints(_hints, false);
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}
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}
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private:
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Painter &_painter;
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QPainter::RenderHints _hints = 0;
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};
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class TWidget;
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template <typename Base>
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class TWidgetHelper : public Base {
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public:
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using Base::Base;
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virtual QMargins getMargins() const {
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return QMargins();
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}
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void moveToLeft(int x, int y, int outerw = 0) {
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auto margins = getMargins();
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x -= margins.left();
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y -= margins.top();
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Base::move(rtl() ? ((outerw > 0 ? outerw : Base::parentWidget()->width()) - x - Base::width()) : x, y);
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}
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void moveToRight(int x, int y, int outerw = 0) {
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auto margins = getMargins();
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x -= margins.right();
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y -= margins.top();
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Base::move(rtl() ? x : ((outerw > 0 ? outerw : Base::parentWidget()->width()) - x - Base::width()), y);
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}
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void setGeometryToLeft(int x, int y, int w, int h, int outerw = 0) {
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auto margins = getMargins();
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x -= margins.left();
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y -= margins.top();
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w -= margins.left() - margins.right();
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h -= margins.top() - margins.bottom();
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Base::setGeometry(rtl() ? ((outerw > 0 ? outerw : Base::parentWidget()->width()) - x - w) : x, y, w, h);
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}
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void setGeometryToRight(int x, int y, int w, int h, int outerw = 0) {
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auto margins = getMargins();
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x -= margins.right();
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y -= margins.top();
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w -= margins.left() - margins.right();
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h -= margins.top() - margins.bottom();
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Base::setGeometry(rtl() ? x : ((outerw > 0 ? outerw : Base::parentWidget()->width()) - x - w), y, w, h);
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}
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QPoint myrtlpoint(int x, int y) const {
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return rtlpoint(x, y, Base::width());
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}
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QPoint myrtlpoint(const QPoint p) const {
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return rtlpoint(p, Base::width());
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}
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QRect myrtlrect(int x, int y, int w, int h) const {
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return rtlrect(x, y, w, h, Base::width());
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}
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QRect myrtlrect(const QRect &r) const {
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return rtlrect(r, Base::width());
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}
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void rtlupdate(const QRect &r) {
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Base::update(myrtlrect(r));
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}
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void rtlupdate(int x, int y, int w, int h) {
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Base::update(myrtlrect(x, y, w, h));
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}
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protected:
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void enterEvent(QEvent *e) final override {
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if (auto parent = tparent()) {
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parent->leaveToChildEvent(e, this);
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}
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return enterEventHook(e);
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}
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virtual void enterEventHook(QEvent *e) {
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return Base::enterEvent(e);
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}
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void leaveEvent(QEvent *e) final override {
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if (auto parent = tparent()) {
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parent->enterFromChildEvent(e, this);
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}
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return leaveEventHook(e);
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}
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virtual void leaveEventHook(QEvent *e) {
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return Base::leaveEvent(e);
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}
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// e - from enterEvent() of child TWidget
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virtual void leaveToChildEvent(QEvent *e, QWidget *child) {
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}
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// e - from leaveEvent() of child TWidget
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virtual void enterFromChildEvent(QEvent *e, QWidget *child) {
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}
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private:
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TWidget *tparent() {
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return qobject_cast<TWidget*>(Base::parentWidget());
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}
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const TWidget *tparent() const {
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return qobject_cast<const TWidget*>(Base::parentWidget());
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}
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template <typename OtherBase>
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friend class TWidgetHelper;
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};
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class TWidget : public TWidgetHelper<QWidget> {
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Q_OBJECT
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public:
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TWidget(QWidget *parent = nullptr) : TWidgetHelper<QWidget>(parent) {
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}
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virtual void grabStart() {
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}
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virtual void grabFinish() {
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}
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bool inFocusChain() const;
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void hideChildren() {
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for (auto child : children()) {
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if (auto widget = qobject_cast<QWidget*>(child)) {
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widget->hide();
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}
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}
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}
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void showChildren() {
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for (auto child : children()) {
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if (auto widget = qobject_cast<QWidget*>(child)) {
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widget->show();
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}
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}
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}
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// Get the size of the widget as it should be.
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// Negative return value means no default width.
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virtual int naturalWidth() const {
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return -1;
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}
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// Count new height for width=newWidth and resize to it.
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void resizeToWidth(int newWidth) {
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auto margins = getMargins();
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auto fullWidth = margins.left() + newWidth + margins.right();
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auto fullHeight = margins.top() + resizeGetHeight(newWidth) + margins.bottom();
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auto newSize = QSize(fullWidth, fullHeight);
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if (newSize != size()) {
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resize(newSize);
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update();
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}
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}
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// Resize to minimum of natural width and available width.
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void resizeToNaturalWidth(int newWidth) {
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auto maxWidth = naturalWidth();
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resizeToWidth((maxWidth >= 0) ? qMin(newWidth, maxWidth) : newWidth);
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}
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QRect rectNoMargins() const {
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return rect().marginsRemoved(getMargins());
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}
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int widthNoMargins() const {
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return rectNoMargins().width();
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}
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int heightNoMargins() const {
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return rectNoMargins().height();
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}
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int bottomNoMargins() const {
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auto rectWithoutMargins = rectNoMargins();
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return y() + rectWithoutMargins.y() + rectWithoutMargins.height();
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}
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QSize sizeNoMargins() const {
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return rectNoMargins().size();
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}
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// Updates the area that is visible inside the scroll container.
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virtual void setVisibleTopBottom(int visibleTop, int visibleBottom) {
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}
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signals:
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// Child widget is responsible for emitting this signal.
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void heightUpdated();
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protected:
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// Resizes content and counts natural widget height for the desired width.
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virtual int resizeGetHeight(int newWidth) {
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return height();
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}
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};
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template <typename Widget>
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QPointer<Widget> weak(Widget *object) {
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return QPointer<Widget>(object);
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}
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template <typename Widget>
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QPointer<const Widget> weak(const Widget *object) {
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return QPointer<const Widget>(object);
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}
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void myEnsureResized(QWidget *target);
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QPixmap myGrab(TWidget *target, QRect rect = QRect(), QColor bg = QColor(255, 255, 255, 0));
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QImage myGrabImage(TWidget *target, QRect rect = QRect(), QColor bg = QColor(255, 255, 255, 0));
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class SingleQueuedInvokation : public QObject {
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public:
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SingleQueuedInvokation(base::lambda<void()> callback) : _callback(callback) {
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}
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void call() {
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if (_pending.testAndSetAcquire(0, 1)) {
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InvokeQueued(this, [this] {
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if (_pending.testAndSetRelease(1, 0)) {
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_callback();
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}
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});
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}
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}
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private:
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base::lambda<void()> _callback;
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QAtomicInt _pending = { 0 };
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};
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// Smart pointer for QObject*, has move semantics, destroys object if it doesn't have a parent.
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template <typename Object>
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class object_ptr {
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public:
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object_ptr(std::nullptr_t) {
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}
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// No default constructor, but constructors with at least
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// one argument are simply make functions.
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template <typename Parent, typename... Args>
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explicit object_ptr(Parent &&parent, Args&&... args) : _object(new Object(std::forward<Parent>(parent), std::forward<Args>(args)...)) {
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}
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object_ptr(const object_ptr &other) = delete;
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object_ptr &operator=(const object_ptr &other) = delete;
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object_ptr(object_ptr &&other) : _object(base::take(other._object)) {
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}
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object_ptr &operator=(object_ptr &&other) {
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auto temp = std::move(other);
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destroy();
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std::swap(_object, temp._object);
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return *this;
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}
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template <typename OtherObject, typename = std::enable_if_t<std::is_base_of<Object, OtherObject>::value>>
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object_ptr(object_ptr<OtherObject> &&other) : _object(base::take(other._object)) {
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}
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template <typename OtherObject, typename = std::enable_if_t<std::is_base_of<Object, OtherObject>::value>>
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object_ptr &operator=(object_ptr<OtherObject> &&other) {
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_object = base::take(other._object);
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return *this;
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}
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object_ptr &operator=(std::nullptr_t) {
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_object = nullptr;
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return *this;
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}
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// So we can pass this pointer to methods like connect().
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Object *data() const {
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return static_cast<Object*>(_object);
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}
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operator Object*() const {
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return data();
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}
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explicit operator bool() const {
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return _object != nullptr;
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}
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Object *operator->() const {
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return data();
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}
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Object &operator*() const {
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return *data();
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}
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// Use that instead "= new Object(parent, ...)"
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template <typename Parent, typename... Args>
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void create(Parent &&parent, Args&&... args) {
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destroy();
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_object = new Object(std::forward<Parent>(parent), std::forward<Args>(args)...);
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}
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void destroy() {
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delete base::take(_object);
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}
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void destroyDelayed() {
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if (_object) {
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if (auto widget = base::up_cast<QWidget*>(data())) {
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widget->hide();
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}
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base::take(_object)->deleteLater();
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}
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}
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~object_ptr() {
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if (auto pointer = _object) {
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if (!pointer->parent()) {
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destroy();
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}
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}
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}
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template <typename ResultType, typename SourceType>
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friend object_ptr<ResultType> static_object_cast(object_ptr<SourceType> source);
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private:
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template <typename OtherObject>
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friend class object_ptr;
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QObject *_object = nullptr;
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};
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template <typename ResultType, typename SourceType>
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inline object_ptr<ResultType> static_object_cast(object_ptr<SourceType> source) {
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auto result = object_ptr<ResultType>(nullptr);
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result._object = static_cast<ResultType*>(base::take(source._object));
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return std::move(result);
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}
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void sendSynteticMouseEvent(QWidget *widget, QEvent::Type type, Qt::MouseButton button, const QPoint &globalPoint);
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inline void sendSynteticMouseEvent(QWidget *widget, QEvent::Type type, Qt::MouseButton button) {
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return sendSynteticMouseEvent(widget, type, button, QCursor::pos());
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}
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