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Diffstat (limited to 'src/core/touch_handle_drawable_qt.cpp')
| -rw-r--r-- | src/core/touch_handle_drawable_qt.cpp | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/src/core/touch_handle_drawable_qt.cpp b/src/core/touch_handle_drawable_qt.cpp new file mode 100644 index 000000000..66b1cf40e --- /dev/null +++ b/src/core/touch_handle_drawable_qt.cpp @@ -0,0 +1,211 @@ +/**************************************************************************** +** +** Copyright (C) 2018 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtWebEngine module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// 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 |