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| |
| // 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/gfx/image/image.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; |
| |
| // Returns the appropriate handle image based on the handle orientation. |
| gfx::Image* 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); |
| } |
| |
| bool IsNearlyZero(float value) |
| { |
| return std::abs(value) < kEpsilon; |
| } |
| |
| } // namespace |
| |
| TouchHandleDrawableQt::TouchHandleDrawableQt(RenderWidgetHostViewQt *rwhv) |
| : m_rwhv(rwhv) |
| , m_enabled(false) |
| , m_alpha(0) |
| , m_orientation(ui::TouchHandleOrientation::UNDEFINED) |
| { |
| QMap<int, QImage> images; |
| for (int orientation = 0; orientation < static_cast<int>(ui::TouchHandleOrientation::UNDEFINED); ++orientation) { |
| gfx::Image* image = GetHandleImage(static_cast<ui::TouchHandleOrientation>(orientation)); |
| images.insert(orientation, toQImage(image->AsBitmap())); |
| } |
| |
| Q_ASSERT(m_rwhv); |
| Q_ASSERT(m_rwhv->adapterClient()); |
| m_client.reset(m_rwhv->adapterClient()->createTouchHandle(images)); |
| } |
| |
| TouchHandleDrawableQt::~TouchHandleDrawableQt() |
| { |
| } |
| |
| void TouchHandleDrawableQt::UpdateBounds() |
| { |
| if (!m_client) |
| return; |
| |
| gfx::RectF newBounds = m_relativeBounds; |
| newBounds.Offset(m_originPosition.x(), m_originPosition.y()); |
| m_client->setBounds(toQt(gfx::ToEnclosingRect(newBounds))); |
| } |
| |
| bool TouchHandleDrawableQt::IsVisible() const |
| { |
| return m_enabled && !IsNearlyZero(m_alpha); |
| } |
| |
| void TouchHandleDrawableQt::SetEnabled(bool enabled) |
| { |
| if (!m_client) |
| return; |
| |
| if (enabled == m_enabled) |
| return; |
| |
| m_enabled = enabled; |
| m_client->setVisible(enabled); |
| } |
| |
| void TouchHandleDrawableQt::SetOrientation(ui::TouchHandleOrientation orientation, bool mirror_vertical, bool mirror_horizontal) |
| { |
| if (!m_client) |
| 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_client->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_client) |
| return; |
| |
| if (alpha == m_alpha) |
| return; |
| |
| m_alpha = alpha; |
| m_client->setOpacity(m_alpha); |
| m_client->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(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; |
| } |
| |
| } // namespace QtWebEngineCore |