From 8d8d56112735df6e3a5304214f52191d271b1807 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Tue, 7 Apr 2020 13:58:24 +0400
Subject: [PATCH] Support rich text in toasts.

---
 ui/basic.style            |  4 +++
 ui/text/text_entity.cpp   |  6 +++++
 ui/text/text_entity.h     |  1 +
 ui/toast/toast.cpp        |  4 +--
 ui/toast/toast.h          |  3 ++-
 ui/toast/toast_widget.cpp | 57 +++++++++++++++++++++++++++++++++++++--
 ui/toast/toast_widget.h   |  5 ++++
 7 files changed, 75 insertions(+), 5 deletions(-)

diff --git a/ui/basic.style b/ui/basic.style
index a43d42c..25f086a 100644
--- a/ui/basic.style
+++ b/ui/basic.style
@@ -271,6 +271,10 @@ inlineResultsMinWidth: 48px;
 inlineDurationMargin: 3px;
 
 toastTextStyle: defaultTextStyle;
+toastTextPalette: TextPalette(defaultTextPalette) {
+	linkFg: mediaviewTextLinkFg;
+	monoFg: mediaviewCaptionFg;
+}
 toastMaxWidth: 480px;
 toastMinMargin: 13px;
 toastPadding: margins(19px, 13px, 19px, 12px);
diff --git a/ui/text/text_entity.cpp b/ui/text/text_entity.cpp
index e9f95e4..c1c43c2 100644
--- a/ui/text/text_entity.cpp
+++ b/ui/text/text_entity.cpp
@@ -1321,6 +1321,12 @@ QString SingleLine(const QString &text) {
 	return result;
 }
 
+TextWithEntities SingleLine(const TextWithEntities &text) {
+	auto copy = text;
+	Trim(copy);
+	return { SingleLine(copy.text), std::move(copy.entities) };
+}
+
 QString RemoveAccents(const QString &text) {
 	auto result = text;
 	auto copying = false;
diff --git a/ui/text/text_entity.h b/ui/text/text_entity.h
index 7d421bb..0bef028 100644
--- a/ui/text/text_entity.h
+++ b/ui/text/text_entity.h
@@ -285,6 +285,7 @@ QString MarkdownPreBadAfter();
 QString Clean(const QString &text);
 QString EscapeForRichParsing(const QString &text);
 QString SingleLine(const QString &text);
+TextWithEntities SingleLine(const TextWithEntities &text);
 QString RemoveAccents(const QString &text);
 QString RemoveEmoji(const QString &text);
 QStringList PrepareSearchWords(const QString &query, const QRegularExpression *SplitterOverride = nullptr);
diff --git a/ui/toast/toast.cpp b/ui/toast/toast.cpp
index 69cfc01..8c5075b 100644
--- a/ui/toast/toast.cpp
+++ b/ui/toast/toast.cpp
@@ -50,13 +50,13 @@ void Show(const Config &config) {
 
 void Show(not_null<QWidget*> parent, const QString &text) {
 	auto config = Config();
-	config.text = text;
+	config.text = { text };
 	Show(parent, config);
 }
 
 void Show(const QString &text) {
 	auto config = Config();
-	config.text = text;
+	config.text = { text };
 	Show(config);
 }
 
diff --git a/ui/toast/toast.h b/ui/toast/toast.h
index 6ced4e9..4094b7e 100644
--- a/ui/toast/toast.h
+++ b/ui/toast/toast.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include "ui/effects/animations.h"
+#include "ui/text/text_entity.h"
 
 namespace Ui {
 namespace Toast {
@@ -18,7 +19,7 @@ class Widget;
 
 inline constexpr auto kDefaultDuration = crl::time(1500);
 struct Config {
-	QString text;
+	TextWithEntities text;
 	QMargins padding;
 	crl::time durationMs = kDefaultDuration;
 	int minWidth = 0;
diff --git a/ui/toast/toast_widget.cpp b/ui/toast/toast_widget.cpp
index 962ca5d..5181cf8 100644
--- a/ui/toast/toast_widget.cpp
+++ b/ui/toast/toast_widget.cpp
@@ -9,6 +9,8 @@
 #include "ui/image/image_prepare.h"
 #include "styles/palette.h"
 
+#include <QtGui/QtEvents>
+
 namespace Ui {
 namespace Toast {
 namespace internal {
@@ -29,12 +31,16 @@ Widget::Widget(QWidget *parent, const Config &config)
 		_maxTextHeight,
 		Qt::LayoutDirectionAuto
 	};
-	_text.setText(
+	_text.setMarkedText(
 		st::toastTextStyle,
 		_multiline ? config.text : TextUtilities::SingleLine(config.text),
 		toastOptions);
 
-	setAttribute(Qt::WA_TransparentForMouseEvents);
+	if (_text.hasLinks()) {
+		setMouseTracking(true);
+	} else {
+		setAttribute(Qt::WA_TransparentForMouseEvents);
+	}
 
 	onParentResized();
 	show();
@@ -63,11 +69,58 @@ void Widget::paintEvent(QPaintEvent *e) {
 	p.setOpacity(_shownLevel);
 	_roundRect.paint(p, rect());
 
+	p.setTextPalette(st::toastTextPalette);
+
 	const auto lines = _maxTextHeight / st::toastTextStyle.font->height;
 	p.setPen(st::toastFg);
 	_text.drawElided(p, _padding.left(), _padding.top(), _textWidth + 1, lines);
 }
 
+void Widget::leaveEventHook(QEvent *e) {
+	if (!_text.hasLinks()) {
+		return;
+	}
+	if (ClickHandler::getActive()) {
+		ClickHandler::setActive(nullptr);
+		setCursor(style::cur_default);
+		update();
+	}
+}
+
+void Widget::mouseMoveEvent(QMouseEvent *e) {
+	if (!_text.hasLinks()) {
+		return;
+	}
+	const auto point = e->pos() - QPoint(_padding.left(), _padding.top());
+	const auto lines = _maxTextHeight / st::toastTextStyle.font->height;
+	const auto state = _text.getStateElided(point, _textWidth + 1);
+	const auto was = ClickHandler::getActive();
+	if (was != state.link) {
+		ClickHandler::setActive(state.link);
+		if ((was != nullptr) != (state.link != nullptr)) {
+			setCursor(was ? style::cur_default : style::cur_pointer);
+		}
+		update();
+	}
+}
+
+void Widget::mousePressEvent(QMouseEvent *e) {
+	if (!_text.hasLinks() || e->button() != Qt::LeftButton) {
+		return;
+	}
+	ClickHandler::pressed();
+}
+
+void Widget::mouseReleaseEvent(QMouseEvent *e) {
+	if (!_text.hasLinks() || e->button() != Qt::LeftButton) {
+		return;
+	}
+	if (const auto handler = ClickHandler::unpressed()) {
+		handler->onClick({ e->button() });
+	}
+}
+
+
 } // namespace internal
 } // namespace Toast
 } // namespace Ui
diff --git a/ui/toast/toast_widget.h b/ui/toast/toast_widget.h
index 0dd8f69..a29d274 100644
--- a/ui/toast/toast_widget.h
+++ b/ui/toast/toast_widget.h
@@ -27,6 +27,11 @@ public:
 protected:
 	void paintEvent(QPaintEvent *e) override;
 
+	void leaveEventHook(QEvent *e) override;
+	void mouseMoveEvent(QMouseEvent *e) override;
+	void mousePressEvent(QMouseEvent *e) override;
+	void mouseReleaseEvent(QMouseEvent *e) override;
+
 private:
 	int widthWithoutPadding(int w) {
 		return w - _padding.left() - _padding.right();