bot description displayed in message history, bot commands are highlighted and sent by click

Telegram/SourceFiles/gui/text.h

@@ -31,11 +31,12 @@ enum {
 	TextParseRichText = 0x004,
 	TextParseMentions = 0x008,
 	TextParseHashtags = 0x010,
+	TextParseBotCommands = 0x020,
 
-	TextTwitterMentions = 0x020,
-	TextTwitterHashtags = 0x040,
-	TextInstagramMentions = 0x080,
-	TextInstagramHashtags = 0x100,
+	TextTwitterMentions = 0x040,
+	TextTwitterHashtags = 0x080,
+	TextInstagramMentions = 0x100,
+	TextInstagramHashtags = 0x200,
 };
 
 struct LinkRange {
@@ -385,6 +386,32 @@ private:
 
 };
 
+class BotCommandLink : public ITextLink {
+public:
+
+	BotCommandLink(const QString &cmd) : _cmd(cmd) {
+	}
+
+	const QString &text() const {
+		return _cmd;
+	}
+
+	void onClick(Qt::MouseButton button) const;
+
+	const QString &readable() const {
+		return _cmd;
+	}
+
+	QString encoded() const {
+		return _cmd;
+	}
+
+private:
+
+	QString _cmd;
+
+};
+
 static const QChar TextCommand(0x0010);
 enum TextCommands {
 	TextCommandBold        = 0x01,
@@ -512,6 +539,7 @@ const QSet<int32> &validTopDomains();
 const QRegularExpression &reDomain();
 const QRegularExpression &reMailName();
 const QRegularExpression &reHashtag();
+const QRegularExpression &reBotCommand();
 
 // text style
 const style::textStyle *textstyleCurrent();