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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 "chrome/browser/ui/ash/editor_menu/utils/utils.h"
#include <string>
#include "ui/display/screen.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
namespace chromeos::editor_menu {
namespace {
int ComputeWidthOnSide(const std::string& app_locale) {
if (app_locale == "ta") {
return kBigEditorMenuMinWidthDip;
}
return kEditorMenuMinWidthDip;
}
std::vector<gfx::Rect> GetEditorMenuBoundsCandidates(
const gfx::Rect& anchor_view_bounds,
const views::View* target,
const gfx::Rect screen_work_area,
const gfx::Point cursor_point,
const CardType& card_type,
const std::string& application_locale) {
const int width_on_top_or_bottom = std::max(
card_type == CardType::kMahiDefaultMenu ? kMahiMenuTopBottomMinWidthDip
: kEditorMenuMinWidthDip,
anchor_view_bounds.width());
const int height_on_top_or_bottom =
target->GetHeightForWidth(width_on_top_or_bottom);
const int width_on_side = ComputeWidthOnSide(application_locale);
const int height_on_side = target->GetHeightForWidth(width_on_side);
// The vertical starting position of top side candidates which makes them be
// included in context menu range but also closer to cursor point.
const int side_top = std::min(
std::max(anchor_view_bounds.y(),
cursor_point.y() - height_on_side - kEditorMenuMarginDip),
anchor_view_bounds.y());
// The vertical starting position of bottom side candidates which makes them
// be included in context menu range but also closer to cursor point.
const int side_bottom =
std::max(std::min(anchor_view_bounds.bottom() - height_on_side,
cursor_point.y() + kEditorMenuMarginDip),
anchor_view_bounds.y());
const bool is_cursor_on_left =
cursor_point.x() <
(anchor_view_bounds.x() + anchor_view_bounds.width() / 2);
const bool is_cursor_on_right =
cursor_point.x() >
(anchor_view_bounds.x() + anchor_view_bounds.width() / 2);
const int side_top_left =
is_cursor_on_left ? side_top : anchor_view_bounds.y();
const int side_top_right =
is_cursor_on_right ? side_top : anchor_view_bounds.y();
const int side_bottom_left =
is_cursor_on_left ? side_bottom
: anchor_view_bounds.bottom() - height_on_side;
const int side_bottom_right =
is_cursor_on_right ? side_bottom
: anchor_view_bounds.bottom() - height_on_side;
std::vector<gfx::Rect> candidates = {
// 1.a top (align with left edge).
{
gfx::Point(
/*x=*/anchor_view_bounds.x(),
/*y=*/anchor_view_bounds.y() - kEditorMenuMarginDip -
height_on_top_or_bottom),
gfx::Size(
/*width=*/width_on_top_or_bottom,
/*height=*/height_on_top_or_bottom),
},
// 1.b top (align with right edge).
{
gfx::Point(
/*x=*/anchor_view_bounds.x() + anchor_view_bounds.width() -
width_on_top_or_bottom,
/*y=*/anchor_view_bounds.y() - kEditorMenuMarginDip -
height_on_top_or_bottom),
gfx::Size(
/*width=*/width_on_top_or_bottom,
/*height=*/height_on_top_or_bottom),
},
// 2.a bottom (align with left edge).
{
gfx::Point(
/*x=*/anchor_view_bounds.x(),
/*y=*/anchor_view_bounds.bottom() + kEditorMenuMarginDip),
gfx::Size(
/*width=*/width_on_top_or_bottom,
/*height=*/height_on_top_or_bottom),
},
// 2.b bottom (align with right edge).
{
gfx::Point(
/*x=*/anchor_view_bounds.x() + anchor_view_bounds.width() -
width_on_top_or_bottom,
/*y=*/anchor_view_bounds.bottom() + kEditorMenuMarginDip),
gfx::Size(
/*width=*/width_on_top_or_bottom,
/*height=*/height_on_top_or_bottom),
},
// 3. top left
{
gfx::Point(
/*x=*/anchor_view_bounds.x() - kEditorMenuMarginDip -
width_on_side,
/*y=*/side_top_left),
gfx::Size(
/*width=*/width_on_side,
/*height=*/height_on_side),
},
// 4. top right
{
gfx::Point(
/*x=*/anchor_view_bounds.right() + kEditorMenuMarginDip,
/*y=*/side_top_right),
gfx::Size(
/*width=*/width_on_side,
/*height=*/height_on_side),
},
// 5. bottom left
{
gfx::Point(
/*x=*/anchor_view_bounds.x() - kEditorMenuMarginDip -
width_on_side,
/*y=*/side_bottom_left),
gfx::Size(
/*width=*/width_on_side,
/*height=*/height_on_side),
},
// 6. bottom right
{
gfx::Point(
/*x=*/anchor_view_bounds.right() + kEditorMenuMarginDip,
/*y=*/side_bottom_right),
gfx::Size(
/*width=*/width_on_side,
/*height=*/height_on_side),
},
};
return candidates;
}
// Pick the best editor menu bounds from candidates.
//
// The best candidate is the one with the largest visible area.
// If there are multiple candidates with the same visible area, pick the one
// closest to the cursor.
gfx::Rect PickBestEditorMenuBounds(std::vector<gfx::Rect> candidates,
const gfx::Rect screen_work_area,
const gfx::Point cursor_point) {
gfx::Rect best_candidate({0, 0}, {0, 0});
int best_visible_score = 0;
double best_cursor_distance = 1E9;
for (const auto& candidate : candidates) {
// The area of intersection between candidate and screen work area.
const int visible_area =
(std::min(candidate.right(), screen_work_area.right()) -
std::max(candidate.x(), screen_work_area.x())) *
(std::min(candidate.bottom(), screen_work_area.bottom()) -
std::max(candidate.y(), screen_work_area.y()));
const int total_area = candidate.width() * candidate.height();
const int visible_score =
total_area == 0 ? 0 : 100 * visible_area / total_area;
const double cursor_distance =
sqrt(pow(candidate.x() + candidate.width() / 2 - cursor_point.x(), 2) +
pow(candidate.y() + candidate.height() / 2 - cursor_point.y(), 2));
if (visible_score > best_visible_score ||
(visible_score == best_visible_score &&
cursor_distance < best_cursor_distance)) {
best_candidate = candidate;
best_visible_score = visible_score;
best_cursor_distance = cursor_distance;
}
}
return best_candidate;
}
} // namespace
gfx::Rect GetEditorMenuBounds(const gfx::Rect& anchor_view_bounds,
const views::View* target,
const std::string& application_locale,
const CardType card_type) {
display::Screen* screen = display::Screen::GetScreen();
const gfx::Rect screen_work_area =
screen->GetDisplayMatching(anchor_view_bounds).work_area();
const gfx::Point cursor_point = screen->GetCursorScreenPoint();
std::vector<gfx::Rect> candidates = GetEditorMenuBoundsCandidates(
anchor_view_bounds, target, screen_work_area, cursor_point, card_type,
application_locale);
return PickBestEditorMenuBounds(candidates, screen_work_area, cursor_point);
}
} // namespace chromeos::editor_menu
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