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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Copyright 2015 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.Chromium file.
// This implementation is based on chromium/ui/touch_selection/touch_handle_drawable_aura.cc
#include "render_widget_host_view_qt.h"
#include "touch_handle_drawable_client.h"
#include "touch_handle_drawable_qt.h"
#include "type_conversion.h"
#include "web_contents_adapter_client.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/resources/grit/ui_resources.h"
namespace QtWebEngineCore {
namespace {
// The distance by which a handle image is offset from the focal point (i.e.
// text baseline) downwards.
const int kSelectionHandleVerticalVisualOffset = 2;
// The padding around the selection handle image can be used to extend the
// handle window so that touch events near the selection handle image are
// targeted to the selection handle window.
const int kSelectionHandlePadding = 0;
// Epsilon value used to compare float values to zero.
const float kEpsilon = 1e-8f;
bool IsNearlyZero(float value)
{
return std::abs(value) < kEpsilon;
}
} // namespace
TouchHandleDrawableQt::TouchHandleDrawableQt(TouchHandleDrawableDelegate *delegate)
: m_delegate(delegate)
, m_enabled(false)
, m_alpha(0)
, m_orientation(ui::TouchHandleOrientation::UNDEFINED)
{
}
TouchHandleDrawableQt::~TouchHandleDrawableQt()
{
}
void TouchHandleDrawableQt::UpdateBounds()
{
if (!m_delegate)
return;
gfx::RectF newBounds = m_relativeBounds;
newBounds.Offset(m_originPosition.x(), m_originPosition.y());
m_delegate->setBounds(toQt(gfx::ToEnclosingRect(newBounds)));
}
bool TouchHandleDrawableQt::IsVisible() const
{
return m_enabled && !IsNearlyZero(m_alpha);
}
void TouchHandleDrawableQt::SetEnabled(bool enabled)
{
if (!m_delegate)
return;
if (enabled == m_enabled)
return;
m_enabled = enabled;
m_delegate->setVisible(enabled);
}
void TouchHandleDrawableQt::SetOrientation(ui::TouchHandleOrientation orientation, bool mirror_vertical, bool mirror_horizontal)
{
if (!m_delegate)
return;
// TODO: Implement adaptive handle orientation logic
DCHECK(!mirror_vertical);
DCHECK(!mirror_horizontal);
if (m_orientation == orientation)
return;
m_orientation = orientation;
gfx::Image* image = GetHandleImage(orientation);
m_delegate->setImage(static_cast<int>(orientation));
// Calculate the relative bounds.
gfx::Size image_size = image->Size();
int window_width = image_size.width() + 2 * kSelectionHandlePadding;
int window_height = image_size.height() + 2 * kSelectionHandlePadding;
m_relativeBounds =
gfx::RectF(-kSelectionHandlePadding,
kSelectionHandleVerticalVisualOffset - kSelectionHandlePadding,
window_width, window_height);
UpdateBounds();
}
void TouchHandleDrawableQt::SetOrigin(const gfx::PointF& position)
{
m_originPosition = position;
UpdateBounds();
}
void TouchHandleDrawableQt::SetAlpha(float alpha)
{
if (!m_delegate)
return;
if (alpha == m_alpha)
return;
m_alpha = alpha;
m_delegate->setOpacity(m_alpha);
m_delegate->setVisible(IsVisible());
}
gfx::RectF TouchHandleDrawableQt::GetVisibleBounds() const
{
gfx::RectF bounds = m_relativeBounds;
bounds.Offset(m_originPosition.x(), m_originPosition.y());
gfx::RectF visibleBounds(bounds);
visibleBounds.Inset(gfx::InsetsF::TLBR(
kSelectionHandlePadding,
kSelectionHandlePadding + kSelectionHandleVerticalVisualOffset,
kSelectionHandlePadding,
kSelectionHandlePadding));
return visibleBounds;
}
float TouchHandleDrawableQt::GetDrawableHorizontalPaddingRatio() const
{
// Qt does not have any transparent padding for its handle drawable.
return 0.0;
}
// Returns the appropriate handle image based on the handle orientation.
gfx::Image *TouchHandleDrawableQt::GetHandleImage(ui::TouchHandleOrientation orientation)
{
int resource_id = 0;
switch (orientation) {
case ui::TouchHandleOrientation::LEFT:
resource_id = IDR_TEXT_SELECTION_HANDLE_LEFT;
break;
case ui::TouchHandleOrientation::CENTER:
resource_id = IDR_TEXT_SELECTION_HANDLE_CENTER;
break;
case ui::TouchHandleOrientation::RIGHT:
resource_id = IDR_TEXT_SELECTION_HANDLE_RIGHT;
break;
case ui::TouchHandleOrientation::UNDEFINED:
NOTREACHED() << "Invalid touch handle bound type.";
return nullptr;
};
return &ui::ResourceBundle::GetSharedInstance().GetImageNamed(resource_id);
}
} // namespace QtWebEngineCore
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