initial commit for 0.4.18 version of Telegram Desktop

Telegram/SourceFiles/gui/flattextarea.h

@@ -0,0 +1,94 @@
+/*
+This file is part of Telegram Desktop,
+an unofficial desktop messaging app, see https://telegram.org
+
+Telegram Desktop is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+It is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
+Copyright (c) 2014 John Preston, https://tdesktop.com
+*/
+#pragma once
+
+#include <QtWidgets/QTextEdit>
+#include "style.h"
+#include "animation.h"
+
+class FlatTextarea : public QTextEdit, public Animated {
+	Q_OBJECT
+
+public:
+
+	FlatTextarea(QWidget *parent, const style::flatTextarea &st, const QString &ph = QString(), const QString &val = QString());
+	QString val() const;
+
+	bool viewportEvent(QEvent *e);
+	void touchEvent(QTouchEvent *e);
+	void paintEvent(QPaintEvent *e);
+	void focusInEvent(QFocusEvent *e);
+	void focusOutEvent(QFocusEvent *e);
+	void keyPressEvent(QKeyEvent *e);
+	void resizeEvent(QResizeEvent *e);
+	void mousePressEvent(QMouseEvent *e);
+
+	void updatePlaceholder();
+
+	QRect getTextRect() const;
+
+	bool animStep(float64 ms);
+
+	QSize sizeHint() const;
+	QSize minimumSizeHint() const;
+
+	QString getText(int32 start = 0, int32 end = -1) const;
+	bool hasText() const;
+
+public slots:
+
+	void onTouchTimer();
+
+	void onDocumentContentsChange(int position, int charsRemoved, int charsAdded);
+	void onDocumentContentsChanged();
+
+signals:
+
+	void changed();
+	void submitted();
+	void cancelled();
+	void tabbed();
+
+protected:
+
+	void insertEmoji(EmojiPtr emoji, QTextCursor c);
+
+private:
+
+	void processDocumentContentsChange(int position, int charsAdded);
+
+	QMimeData *createMimeDataFromSelection() const;
+
+	QString _ph, _phelided, _oldtext;
+	bool _phVisible;
+	anim::ivalue a_phLeft;
+	anim::fvalue a_phAlpha;
+	anim::cvalue a_phColor;
+	style::flatTextarea _st;
+
+	int32 _fakeMargin;
+
+	QTimer _touchTimer;
+	bool _touchPress, _touchRightButton, _touchMove;
+	QPoint _touchStart;
+
+	bool _replacingEmojis;
+	typedef QPair<int, int> Insertion;
+	typedef QList<Insertion> Insertions;
+	Insertions _insertions;
+};