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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/quick_insert/views/quick_insert_image_item_grid_view.h"
#include <algorithm>
#include <functional>
#include <iterator>
#include <memory>
#include <utility>
#include "ash/quick_insert/views/quick_insert_image_item_view.h"
#include "ash/quick_insert/views/quick_insert_item_view.h"
#include "ash/quick_insert/views/quick_insert_traversable_item_container.h"
#include "base/notimplemented.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/views/accessibility/view_accessibility.h"
#include "ui/views/layout/box_layout_view.h"
#include "ui/views/layout/layout_types.h"
#include "ui/views/layout/table_layout.h"
#include "ui/views/view.h"
#include "ui/views/view_class_properties.h"
#include "ui/views/view_utils.h"
namespace ash {
namespace {
// Padding between image grid items.
constexpr int kImageGridPadding = 8;
// Margin for the image grid.
constexpr auto kImageGridMargin = gfx::Insets::TLBR(16, 16, 0, 16);
std::unique_ptr<views::View> CreateImageGridColumn() {
auto column =
views::Builder<views::BoxLayoutView>()
.SetOrientation(views::BoxLayout::Orientation::kVertical)
.SetCrossAxisAlignment(views::BoxLayout::CrossAxisAlignment::kStretch)
.Build();
column->SetBetweenChildSpacing(kImageGridPadding);
return column;
}
views::View* ItemInColumnWithIndexClosestTo(views::View* column,
const size_t index) {
if (column->children().empty()) {
return nullptr;
} else if (index < column->children().size()) {
return column->children()[index]->children().front().get();
} else {
return column->children().back()->children().front().get();
}
}
std::unique_ptr<views::View> CreateListItemView() {
auto view = std::make_unique<views::View>();
view->SetUseDefaultFillLayout(true);
view->GetViewAccessibility().SetRole(ax::mojom::Role::kListItem);
// Setting the hierarchical level explicitly allows the SetSize to be
// overridden later.
view->GetViewAccessibility().SetHierarchicalLevel(1);
return view;
}
} // namespace
QuickInsertImageItemGridView::QuickInsertImageItemGridView(int grid_width,
bool has_top_margin)
: column_width_(
(grid_width - kImageGridPadding - kImageGridMargin.width()) / 2) {
SetLayoutManager(std::make_unique<views::TableLayout>())
->AddColumn(/*h_align=*/views::LayoutAlignment::kCenter,
/*v_align=*/views::LayoutAlignment::kStretch,
/*horizontal_resize=*/1.0f,
/*size_type=*/views::TableLayout::ColumnSize::kFixed,
/*fixed_width=*/0, /*min_width=*/0)
.AddPaddingColumn(
/*horizontal_resize=*/views::TableLayout::kFixedSize,
/*width=*/kImageGridPadding)
.AddColumn(/*h_align=*/views::LayoutAlignment::kCenter,
/*v_align=*/views::LayoutAlignment::kStretch,
/*horizontal_resize=*/1.0f,
/*size_type=*/views::TableLayout::ColumnSize::kFixed,
/*fixed_width=*/0, /*min_width=*/0)
.AddRows(1, /*vertical_resize=*/views::TableLayout::kFixedSize,
/*height=*/0);
gfx::Insets margins = kImageGridMargin;
if (!has_top_margin) {
margins.set_top(0);
}
SetProperty(views::kMarginsKey, margins);
AddChildView(CreateImageGridColumn());
AddChildView(CreateImageGridColumn());
}
QuickInsertImageItemGridView::~QuickInsertImageItemGridView() = default;
views::View* QuickInsertImageItemGridView::GetTopItem() {
views::View* column = children().front();
return column->children().empty()
? nullptr
: column->children().front()->children().front().get();
}
views::View* QuickInsertImageItemGridView::GetBottomItem() {
views::View* tallest_column =
std::ranges::max(children(),
/*comp=*/std::ranges::less(),
/*proj=*/[](const views::View* v) {
return v->GetPreferredSize().height();
});
return tallest_column->children().empty()
? nullptr
: tallest_column->children().back()->children().front().get();
}
views::View* QuickInsertImageItemGridView::GetItemAbove(views::View* item) {
views::View* column = GetColumnContaining(item);
if (!column || item->parent() == column->children().front()) {
return nullptr;
}
return std::prev(std::ranges::find(column->children(), item->parent()))
->get()
->children()
.front()
.get();
}
views::View* QuickInsertImageItemGridView::GetItemBelow(views::View* item) {
views::View* column = GetColumnContaining(item);
if (!column || item->parent() == column->children().back()) {
return nullptr;
}
return std::next(std::ranges::find(column->children(), item->parent()))
->get()
->children()
.front()
.get();
}
views::View* QuickInsertImageItemGridView::GetItemLeftOf(views::View* item) {
views::View* column = GetColumnContaining(item);
if (!column || column == children().front()) {
return nullptr;
}
// Prefer to return the item with the same index in the column to the left,
// since this will probably be at a similar height to `item` (at least in
// usual scenarios where the grid items all have similar dimensions).
const size_t item_index = column->GetIndexOf(item->parent()).value();
views::View* left_column =
std::prev(std::ranges::find(children(), column))->get();
return ItemInColumnWithIndexClosestTo(left_column, item_index);
}
views::View* QuickInsertImageItemGridView::GetItemRightOf(views::View* item) {
views::View* column = GetColumnContaining(item);
if (!column || column == children().back()) {
return nullptr;
}
// Prefer to return the item with the same index in the column to the right,
// since this will probably be at a similar height to `item` (at least in
// usual scenarios where the grid items all have similar dimensions).
const size_t item_index = column->GetIndexOf(item->parent()).value();
views::View* right_column =
std::next(std::ranges::find(children(), column))->get();
return ItemInColumnWithIndexClosestTo(right_column, item_index);
}
bool QuickInsertImageItemGridView::ContainsItem(views::View* item) {
return Contains(item);
}
QuickInsertImageItemView* QuickInsertImageItemGridView::AddImageItem(
std::unique_ptr<QuickInsertImageItemView> image_item) {
views::View* shortest_column =
std::ranges::min(children(),
/*comp=*/std::ranges::less(),
/*proj=*/[](const views::View* v) {
return v->GetPreferredSize().height();
});
QuickInsertImageItemView* new_item =
shortest_column->AddChildView(CreateListItemView())
->AddChildView(std::move(image_item));
new_item->FitToWidth(column_width_);
// Only the first item in the grid should be focusable.
if (num_items_ > 0) {
new_item->SetFocusBehavior(views::View::FocusBehavior::NEVER);
}
++num_items_;
// Update the PosInSet and SetSize for all items, column by column.
size_t pos_in_set = 1;
for (views::View* column : children()) {
for (views::View* item : column->children()) {
item->GetViewAccessibility().SetPosInSet(pos_in_set);
item->GetViewAccessibility().SetSetSize(num_items_);
++pos_in_set;
}
}
return new_item;
}
views::View* QuickInsertImageItemGridView::GetColumnContaining(
views::View* item) {
views::View* column =
item->parent() == nullptr ? nullptr : item->parent()->parent();
return column && column->parent() == this ? column : nullptr;
}
BEGIN_METADATA(QuickInsertImageItemGridView)
END_METADATA
} // namespace ash
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