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Made base::lambda a copyable value type.

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Now base::lambda can be copied and can wrap any immutable lambda.
For mutable lambdas there is base::lambda_once (which you're
supposed to call only once to pass data through lambda captures,
for example by using std::unique_ptr). Generally base::lambda is
passed by value and base::lambda_once is passed by rvalue reference.
This commit is contained in:
John Preston
2017-02-26 14:32:13 +03:00
parent f82989c9c3
commit c207743338
78 changed files with 662 additions and 633 deletions
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17
Telegram/SourceFiles/mediaview.cpp
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@@ -1446,24 +1446,15 @@ void MediaView::initThemePreview() {
}
update();
});
struct mutable_ready {
mutable_ready(decltype(ready) value) : value(std::move(value)) {
}
mutable decltype(ready) value;
};
struct mutable_result {
mutable_result(std::unique_ptr<Window::Theme::Preview> value) : value(std::move(value)) {
}
mutable std::unique_ptr<Window::Theme::Preview> value;
};
Window::Theme::CurrentData current;
current.backgroundId = Window::Theme::Background()->id();
current.backgroundImage = Window::Theme::Background()->pixmap();
current.backgroundTiled = Window::Theme::Background()->tile();
base::TaskQueue::Normal().Put([path, current, callback = mutable_ready(std::move(ready))]() {
base::TaskQueue::Normal().Put([ready = std::move(ready), path, current]() mutable {
auto preview = Window::Theme::GeneratePreview(path, current);
base::TaskQueue::Main().Put([result = mutable_result(std::move(preview)), callback = std::move(callback.value)]() {
callback(std::move(result.value));
base::TaskQueue::Main().Put([ready = std::move(ready), result = std::move(preview)]() mutable {
ready(std::move(result));
});
});
location.accessDisable();