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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/views/layout/layout_manager.h"
#include "base/auto_reset.h"
#include "base/memory/raw_ptr.h"
#include "ui/views/view.h"
namespace views {
LayoutManager::~LayoutManager() = default;
void LayoutManager::Installed(View* host) {}
void LayoutManager::InvalidateLayout() {}
gfx::Size LayoutManager::GetMinimumSize(const View* host) const {
// Fall back to using preferred size if no minimum size calculation is
// available (e.g. legacy layout managers).
//
// Ideally we'd just call GetPreferredSize() on ourselves here, but because
// some legacy views with layout managers override GetPreferredSize(), we need
// to call GetPreferredSize() on the host view instead. The default
// views::View behavior will be to call GetPreferredSize() on this layout
// manager, so the fallback behavior in all other cases is as expected.
return host->GetPreferredSize({});
}
int LayoutManager::GetPreferredHeightForWidth(const View* host,
int width) const {
return GetPreferredSize(host).height();
}
SizeBounds LayoutManager::GetAvailableSize(const View* host,
const View* view) const {
return SizeBounds();
}
void LayoutManager::ViewAdded(View* host, View* view) {}
void LayoutManager::ViewRemoved(View* host, View* view) {}
void LayoutManager::ViewVisibilitySet(View* host,
View* view,
bool old_visibility,
bool new_visibility) {
// Changing the visibility of a child view should force a re-layout. There is
// more sophisticated logic in LayoutManagerBase but this should be adequate
// for most legacy layouts (none of which override this method).
// TODO(dfried): Remove this if/when LayoutManager and LayoutManagerBase can
// be merged.
if (old_visibility != new_visibility) {
host->InvalidateLayout();
}
}
void LayoutManager::SetViewVisibility(View* view, bool visible) {
DCHECK(!view->parent() || view->parent()->GetLayoutManager() == this ||
view->parent()->GetLayoutManager() == nullptr);
base::AutoReset<raw_ptr<View>> setter(&view_setting_visibility_on_, view);
view->SetVisible(visible);
}
std::vector<raw_ptr<View, VectorExperimental>>
LayoutManager::GetChildViewsInPaintOrder(const View* host) const {
return host->children();
}
} // namespace views
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