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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_VIEWS_VIEW_UTILS_H_
#define UI_VIEWS_VIEW_UTILS_H_
#include <memory>
#include <string>
#include <type_traits>
#include <vector>
#include "base/debug/stack_trace.h"
#include "base/memory/raw_ptr.h"
#include "ui/base/class_property.h"
#include "ui/base/metadata/metadata_types.h"
#include "ui/views/debug/debugger_utils.h"
#include "ui/views/view.h"
#include "ui/views/views_export.h"
namespace views {
VIEWS_EXPORT extern const ui::ClassProperty<base::debug::StackTrace*>* const
kViewStackTraceKey;
class ViewDebugWrapperImpl : public debug::ViewDebugWrapper {
public:
explicit ViewDebugWrapperImpl(View* view);
ViewDebugWrapperImpl(const ViewDebugWrapperImpl&) = delete;
ViewDebugWrapperImpl& operator=(const ViewDebugWrapperImpl&) = delete;
~ViewDebugWrapperImpl() override;
// debug::ViewDebugWrapper:
std::string GetViewClassName() override;
int GetID() override;
debug::ViewDebugWrapper::BoundsTuple GetBounds() override;
bool GetVisible() override;
bool GetNeedsLayout() override;
bool GetEnabled() override;
std::vector<debug::ViewDebugWrapper*> GetChildren() override;
void ForAllProperties(PropCallback callback) override;
private:
const raw_ptr<const View> view_;
std::vector<std::unique_ptr<ViewDebugWrapperImpl>> children_;
};
template <typename V>
bool IsViewClass(View* view) {
static_assert(std::is_base_of<View, V>::value, "Only View classes supported");
ui::metadata::ClassMetaData* parent = V::MetaData();
ui::metadata::ClassMetaData* child = view->GetClassMetaData();
while (child && child != parent)
child = child->parent_class_meta_data();
return !!child;
}
template <typename V>
V* AsViewClass(View* view) {
if (!IsViewClass<V>(view))
return nullptr;
return static_cast<V*>(view);
}
VIEWS_EXPORT void PrintViewHierarchy(View* view,
bool verbose = false,
int depth = -1);
VIEWS_EXPORT std::string GetViewDebugInfo(View* view);
} // namespace views
#endif // UI_VIEWS_VIEW_UTILS_H_
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