Show enlarge photo button in webpage preview.

Telegram/SourceFiles/data/data_web_page.cpp

@@ -391,3 +391,7 @@ bool WebPageData::computeDefaultSmallMedia() const {
 	}
 	return false;
 }
+
+bool WebPageData::suggestEnlargePhoto() const {
+	return !siteName.isEmpty() || !title.isEmpty() || !description.empty();
+}

Telegram/SourceFiles/data/data_web_page.h

@@ -90,6 +90,7 @@ struct WebPageData {
 
 	[[nodiscard]] QString displayedSiteName() const;
 	[[nodiscard]] bool computeDefaultSmallMedia() const;
+	[[nodiscard]] bool suggestEnlargePhoto() const;
 
 	const WebPageId id = 0;
 	WebPageType type = WebPageType::None;

Telegram/SourceFiles/history/view/history_view_cursor_state.h

@@ -22,6 +22,7 @@ enum class CursorState : char {
 	None,
 	Text,
 	Date,
+	Enlarge,
 	Forwarded,
 };
 

Telegram/SourceFiles/history/view/media/history_view_photo.cpp

@@ -35,6 +35,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_file_click_handler.h"
 #include "data/data_file_origin.h"
 #include "data/data_auto_download.h"
+#include "data/data_web_page.h"
 #include "core/application.h"
 #include "styles/style_chat.h"
 
@@ -242,6 +243,7 @@ QSize Photo::countCurrentSize(int newWidth) {
 		maxWidth());
 	newWidth = qMax(pix.width(), minWidth);
 	auto newHeight = qMax(pix.height(), st::minPhotoSize);
+	auto imageHeight = newHeight;
 	if (_parent->hasBubble() && !_caption.isEmpty()) {
 		auto captionMaxWidth = st::msgPadding.left()
 			+ _caption.maxWidth()
@@ -252,7 +254,7 @@ QSize Photo::countCurrentSize(int newWidth) {
 		}
 		const auto maxWithCaption = qMin(st::msgMaxWidth, captionMaxWidth);
 		newWidth = qMin(qMax(newWidth, maxWithCaption), thumbMaxWidth);
-		newHeight = adjustHeightForLessCrop(
+		imageHeight = newHeight = adjustHeightForLessCrop(
 			dimensions,
 			{ newWidth, newHeight });
 		const auto captionw = newWidth
@@ -266,6 +268,15 @@ QSize Photo::countCurrentSize(int newWidth) {
 			newHeight += st::msgPadding.bottom();
 		}
 	}
+	const auto enlargeInner = st::historyPageEnlargeSize;
+	const auto enlargeOuter = 2 * st::historyPageEnlargeSkip + enlargeInner;
+	const auto showEnlarge = (_parent->media() != this)
+		&& _parent->data()->media()
+		&& _parent->data()->media()->webpage()
+		&& _parent->data()->media()->webpage()->suggestEnlargePhoto()
+		&& (newWidth >= enlargeOuter)
+		&& (imageHeight >= enlargeOuter);
+	_showEnlarge = showEnlarge ? 1 : 0;
 	return { newWidth, newHeight };
 }
 
@@ -351,15 +362,16 @@ void Photo::draw(Painter &p, const PaintContext &context) const {
 			fillImageOverlay(p, rthumb, rounding, context);
 		}
 	}
-	if (radial || (!loaded && !_data->loading())) {
-		const auto radialOpacity = (radial && loaded && !_data->uploading())
-			? _animation->radial.opacity() :
-			1.;
-		const auto innerSize = st::msgFileLayout.thumbSize;
-		QRect inner(rthumb.x() + (rthumb.width() - innerSize) / 2, rthumb.y() + (rthumb.height() - innerSize) / 2, innerSize, innerSize);
+
+	const auto showEnlarge = loaded && _showEnlarge;
+	const auto paintInCenter = (radial || (!loaded && !_data->loading()));
+	if (paintInCenter || showEnlarge) {
 		p.setPen(Qt::NoPen);
 		if (context.selected()) {
 			p.setBrush(st->msgDateImgBgSelected());
+		} else if (showEnlarge) {
+			const auto over = ClickHandler::showAsActive(_openl);
+			p.setBrush(over ? st->msgDateImgBgOver() : st->msgDateImgBg());
 		} else if (isThumbAnimation()) {
 			const auto over = _animation->a_thumbOver.value(1.);
 			p.setBrush(anim::brush(st->msgDateImgBg(), st->msgDateImgBgOver(), over));
@@ -367,6 +379,13 @@ void Photo::draw(Painter &p, const PaintContext &context) const {
 			const auto over = ClickHandler::showAsActive(_data->loading() ? _cancell : _savel);
 			p.setBrush(over ? st->msgDateImgBgOver() : st->msgDateImgBg());
 		}
+	}
+	if (paintInCenter) {
+		const auto radialOpacity = (radial && loaded && !_data->uploading())
+			? _animation->radial.opacity() :
+			1.;
+		const auto innerSize = st::msgFileLayout.thumbSize;
+		QRect inner(rthumb.x() + (rthumb.width() - innerSize) / 2, rthumb.y() + (rthumb.height() - innerSize) / 2, innerSize, innerSize);
 
 		p.setOpacity(radialOpacity * p.opacity());
 
@@ -386,6 +405,13 @@ void Photo::draw(Painter &p, const PaintContext &context) const {
 			_animation->radial.draw(p, rinner, st::msgFileRadialLine, sti->historyFileThumbRadialFg);
 		}
 	}
+	if (showEnlarge) {
+		auto hq = PainterHighQualityEnabler(p);
+		const auto rect = enlargeRect();
+		const auto radius = st::historyPageEnlargeRadius;
+		p.drawRoundedRect(rect, radius, radius);
+		sti->historyPageEnlarge.paintInCenter(p, rect);
+	}
 
 	// date
 	if (!_caption.isEmpty()) {
@@ -631,6 +657,18 @@ QSize Photo::photoSize() const {
 	return QSize(_data->width(), _data->height());
 }
 
+QRect Photo::enlargeRect() const {
+	const auto skip = st::historyPageEnlargeSkip;
+	const auto enlargeInner = st::historyPageEnlargeSize;
+	const auto enlargeOuter = 2 * skip + enlargeInner;
+	return {
+	   width() - enlargeOuter + skip,
+	   skip,
+	   enlargeInner,
+	   enlargeInner,
+	};
+}
+
 TextState Photo::textState(QPoint point, StateRequest request) const {
 	auto result = TextState(_parent);
 
@@ -673,6 +711,11 @@ TextState Photo::textState(QPoint point, StateRequest request) const {
 			: _data->loading()
 			? _cancell
 			: _savel;
+		if (_showEnlarge
+			&& result.link == _openl
+			&& enlargeRect().contains(point)) {
+			result.cursor = CursorState::Enlarge;
+		}
 	}
 	if (_caption.isEmpty() && _parent->media() == this) {
 		auto fullRight = paintx + paintw;

Telegram/SourceFiles/history/view/media/history_view_photo.h

@@ -163,6 +163,7 @@ private:
 		QPoint photoPosition) const;
 
 	[[nodiscard]] QSize photoSize() const;
+	[[nodiscard]] QRect enlargeRect() const;
 
 	void togglePollingStory(bool enabled) const;
 
@@ -178,6 +179,7 @@ private:
 	mutable uint32 _imageCacheForum : 1 = 0;
 	mutable uint32 _imageCacheBlurred : 1 = 0;
 	mutable uint32 _pollingStory : 1 = 0;
+	mutable uint32 _showEnlarge : 1 = 0;
 
 };
 

Telegram/SourceFiles/history/view/media/history_view_web_page.cpp

@@ -783,7 +783,11 @@ TextState WebPage::textState(QPoint point, StateRequest request) const {
 			auto attachTop = tshift - bubble.top();
 			if (rtl()) attachLeft = width() - attachLeft - _attach->width();
 			result = _attach->textState(point - QPoint(attachLeft, attachTop), request);
-			result.link = replaceAttachLink(result.link);
+			if (result.cursor == CursorState::Enlarge) {
+				result.cursor = CursorState::None;
+			} else {
+				result.link = replaceAttachLink(result.link);
+			}
 		}
 	}
 	if (!result.link && outer.contains(point)) {

Telegram/SourceFiles/ui/chat/chat.style

@@ -640,6 +640,12 @@ historyPageButtonLine: 1px;
 historyPageButtonHeight: 36px;
 historyPageButtonPadding: margins(13px, 8px, 13px, 8px);
 
+historyPageEnlarge: icon{{ "chat/link_photo_enlarge", historyFileThumbRadialFg }};
+historyPageEnlargeSelected: icon{{ "chat/link_photo_enlarge", historyFileThumbRadialFgSelected }};
+historyPageEnlargeSize: 36px;
+historyPageEnlargeSkip: 4px;
+historyPageEnlargeRadius: 8px;
+
 historyCommentsButtonHeight: 40px;
 historyCommentsSkipLeft: 9px;
 historyCommentsSkipText: 10px;

Telegram/SourceFiles/ui/chat/chat_style.cpp

@@ -505,6 +505,10 @@ ChatStyle::ChatStyle(rpl::producer<ColorIndicesCompressed> colorIndices) {
 		&MessageImageStyle::historyVideoMessageMute,
 		st::historyVideoMessageMute,
 		st::historyVideoMessageMuteSelected);
+	make(
+		&MessageImageStyle::historyPageEnlarge,
+		st::historyPageEnlarge,
+		st::historyPageEnlargeSelected);
 
 	updateDarkValue();
 }

Telegram/SourceFiles/ui/chat/chat_style.h

@@ -117,6 +117,7 @@ struct MessageImageStyle {
 	style::icon historyVideoDownload = { Qt::Uninitialized };
 	style::icon historyVideoCancel = { Qt::Uninitialized };
 	style::icon historyVideoMessageMute = { Qt::Uninitialized };
+	style::icon historyPageEnlarge = { Qt::Uninitialized };
 };
 
 struct ReactionPaintInfo {