Proof-of-concept custom scheme in WKWebView.

Telegram/SourceFiles/data/data_session.cpp

@@ -3509,10 +3509,10 @@ void Session::webpageApplyFields(
 		}
 	}
 	if (const auto page = data.vcached_page()) {
-		for (const auto photo : page->data().vphotos().v) {
+		for (const auto &photo : page->data().vphotos().v) {
 			processPhoto(photo);
 		}
-		for (const auto document : page->data().vdocuments().v) {
+		for (const auto &document : page->data().vdocuments().v) {
 			processDocument(document);
 		}
 	}

Telegram/SourceFiles/history/history_item.cpp

@@ -18,6 +18,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/history_item_helpers.h"
 #include "history/history_unread_things.h"
 #include "history/history.h"
+#include "iv/iv_data.h"
 #include "mtproto/mtproto_config.h"
 #include "ui/text/format_values.h"
 #include "ui/text/text_isolated_emoji.h"
@@ -668,6 +669,7 @@ HistoryItem::HistoryItem(
 			: nullptr),
 		nullptr,
 		WebPageCollage(),
+		nullptr,
 		0,
 		QString(),
 		false,

Telegram/SourceFiles/iv/iv_controller.cpp

@@ -29,7 +29,7 @@ void Controller::show(const QString &dataPath, Prepared page) {
 	_window = std::make_unique<Ui::RpWindow>();
 	const auto window = _window.get();
 
-	window->setGeometry({ 200, 200, 800, 600 });
+	window->setGeometry({ 200, 200, 600, 800 });
 
 	const auto container = Ui::CreateChild<Ui::RpWidget>(
 		window->body().get());

Telegram/SourceFiles/iv/iv_prepare.cpp

@@ -132,13 +132,11 @@ private:
 
 	const Options _options;
 
-	const QByteArray _resourcePrefix;
 	base::flat_set<QByteArray> _resources;
 
 	Prepared _result;
 
 	bool _rtl = false;
-	bool _imageAsBackground = false;
 	bool _captionAsTitle = false;
 	bool _captionWrapped = false;
 	base::flat_map<uint64, Photo> _photosById;
@@ -171,9 +169,6 @@ private:
 
 Parser::Parser(const Source &source, const Options &options)
 : _options(options)
-, _resourcePrefix(options.saveToFolder.isEmpty()
-	? "http://desktop-app-resource/"
-	: QByteArray())
 , _rtl(source.page.data().is_rtl()) {
 	process(source);
 	_result.html = prepare(page(source.page.data()));
@@ -968,10 +963,11 @@ QByteArray Parser::mapUrl(const Geo &geo, int width, int height, int zoom) {
 }
 
 QByteArray Parser::resource(QByteArray id) {
-	if (!_options.saveToFolder.isEmpty() && _resources.emplace(id).second) {
+	const auto toFolder = !_options.saveToFolder.isEmpty();
+	if (toFolder && _resources.emplace(id).second) {
 		_result.resources.push_back(id);
 	}
-	return _resourcePrefix + id;
+	return toFolder ? id : ('/' + id);
 }
 
 QByteArray Parser::page(const MTPDpage &data) {