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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/views/layout/fill_layout.h"
#include <algorithm>
namespace views {
FillLayout::FillLayout() = default;
FillLayout::~FillLayout() = default;
FillLayout& FillLayout::SetIncludeHiddenViews(bool include_hidden_views) {
if (include_hidden_views != include_hidden_views_) {
include_hidden_views_ = include_hidden_views;
InvalidateHost(true);
}
return *this;
}
FillLayout& FillLayout::SetMinimumSizeEnabled(bool minimum_size_enabled) {
if (minimum_size_enabled != minimum_size_enabled_) {
minimum_size_enabled_ = minimum_size_enabled;
InvalidateHost(true);
}
return *this;
}
ProposedLayout FillLayout::CalculateProposedLayout(
const SizeBounds& size_bounds) const {
// Because we explicitly override GetPreferredSize and
// GetPreferredHeightForWidth(), we should always call this method with well-
// defined bounds.
DCHECK(size_bounds.is_fully_bounded());
ProposedLayout layout;
layout.host_size = host_view()->size();
const gfx::Rect contents_bounds = host_view()->GetContentsBounds();
for (View* child : host_view()->children()) {
if (ShouldIncludeChild(child)) {
layout.child_layouts.push_back(
ChildLayout{child, child->GetVisible(), contents_bounds,
SizeBounds(contents_bounds.size())});
}
}
return layout;
}
gfx::Size FillLayout::GetPreferredSize(const View* host) const {
DCHECK_EQ(host_view(), host);
gfx::Size result;
bool has_child = false;
for (const View* child : host->children()) {
if (ShouldIncludeChild(child)) {
has_child = true;
result.SetToMax(child->GetPreferredSize());
}
}
// For backwards compatibility, do not include insets if there are no
// children.
if (has_child) {
const gfx::Insets insets = host->GetInsets();
result.Enlarge(insets.width(), insets.height());
}
return result;
}
gfx::Size FillLayout::GetMinimumSize(const View* host) const {
DCHECK_EQ(host_view(), host);
if (!minimum_size_enabled_)
return host->GetPreferredSize();
gfx::Size result;
bool has_child = false;
for (const View* child : host->children()) {
if (ShouldIncludeChild(child)) {
has_child = true;
result.SetToMax(child->GetMinimumSize());
}
}
// For backwards compatibility, do not include insets if there are no
// children.
if (has_child) {
const gfx::Insets insets = host->GetInsets();
result.Enlarge(insets.width(), insets.height());
}
return result;
}
int FillLayout::GetPreferredHeightForWidth(const View* host, int width) const {
DCHECK_EQ(host_view(), host);
const gfx::Insets insets = host->GetInsets();
width -= insets.width();
int height = 0;
for (const View* child : host->children()) {
if (ShouldIncludeChild(child)) {
height =
std::max(height, insets.height() + child->GetHeightForWidth(width));
}
}
return height;
}
bool FillLayout::ShouldIncludeChild(const View* view) const {
return include_hidden_views_ ? !IsChildViewIgnoredByLayout(view)
: IsChildIncludedInLayout(view);
}
} // namespace views
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