Implement touch text selection for QQuickWebEngineView

Touch handle and touch selection menu are not implemented for widget.

Task-number: QTBUG-59999
Change-Id: Ia492e58b83d3ad38cdf6877d468724c399f34367
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

1 files changed, 343 insertions, 0 deletions

diff --git a/src/core/touch_selection_controller_client_qt.cpp b/src/core/touch_selection_controller_client_qt.cpp
new file mode 100644
index 000000000..da3c78b8a
--- /dev/null
+++ b/src/core/touch_selection_controller_client_qt.cpp
@@ -0,0 +1,343 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "render_widget_host_view_qt.h"
+#include "touch_handle_drawable_qt.h"
+#include "touch_selection_controller_client_qt.h"
+#include "touch_selection_menu_controller.h"
+#include "type_conversion.h"
+#include "web_contents_adapter.h"
+#include "web_contents_adapter_client.h"
+
+#include "content/browser/frame_host/render_frame_host_impl.h"
+#include "content/browser/renderer_host/render_widget_host_impl.h"
+#include "ui/gfx/geometry/size_conversions.h"
+
+#include <QClipboard>
+#include <QGuiApplication>
+
+namespace QtWebEngineCore {
+
+TouchSelectionControllerClientQt::TouchSelectionControllerClientQt(RenderWidgetHostViewQt *rwhv)
+    : m_rwhv(rwhv)
+    , m_menuController(new TouchSelectionMenuController(this))
+    , m_menuShowing(false)
+    , m_menuRequested(false)
+    , m_touchDown(false)
+    , m_scrollInProgress(false)
+    , m_handleDragInProgress(false)
+{
+    Q_ASSERT(rwhv);
+}
+
+TouchSelectionControllerClientQt::~TouchSelectionControllerClientQt()
+{
+}
+
+bool TouchSelectionControllerClientQt::handleContextMenu(const content::ContextMenuParams& params)
+{
+    if ((params.source_type == ui::MENU_SOURCE_LONG_PRESS ||
+         params.source_type == ui::MENU_SOURCE_LONG_TAP) &&
+        params.is_editable && params.selection_text.empty()) {
+        m_menuRequested = true;
+        updateMenu();
+        return true;
+    }
+
+    const bool from_touch = params.source_type == ui::MENU_SOURCE_LONG_PRESS ||
+                            params.source_type == ui::MENU_SOURCE_LONG_TAP ||
+                            params.source_type == ui::MENU_SOURCE_TOUCH;
+    if (from_touch && !params.selection_text.empty())
+        return true;
+
+    GetTouchSelectionController()->HideAndDisallowShowingAutomatically();
+    return false;
+}
+
+void TouchSelectionControllerClientQt::onTouchDown()
+{
+    m_touchDown = true;
+    updateMenu();
+}
+
+void TouchSelectionControllerClientQt::onTouchUp()
+{
+    m_touchDown = false;
+    updateMenu();
+}
+
+void TouchSelectionControllerClientQt::onScrollBegin()
+{
+    m_scrollInProgress = true;
+    GetTouchSelectionController()->SetTemporarilyHidden(true);
+    updateMenu();
+}
+
+void TouchSelectionControllerClientQt::onScrollEnd()
+{
+    m_scrollInProgress = false;
+    GetTouchSelectionController()->SetTemporarilyHidden(false);
+    updateMenu();
+}
+
+bool TouchSelectionControllerClientQt::IsCommandIdEnabled(int command_id) const
+{
+    bool editable = m_rwhv->getTextInputType() != ui::TEXT_INPUT_TYPE_NONE;
+    bool readable = m_rwhv->getTextInputType() != ui::TEXT_INPUT_TYPE_PASSWORD;
+    bool hasSelection = !m_rwhv->GetSelectedText().empty();
+
+    switch (command_id) {
+    case TouchSelectionMenuController::Cut:
+        return editable && readable && hasSelection;
+    case TouchSelectionMenuController::Copy:
+        return readable && hasSelection;
+    case TouchSelectionMenuController::Paste:
+        return editable && !QGuiApplication::clipboard()->text().isEmpty();
+    default:
+        return false;
+    }
+}
+
+void TouchSelectionControllerClientQt::ExecuteCommand(int command_id, int event_flags)
+{
+    Q_UNUSED(event_flags);
+    GetTouchSelectionController()->HideAndDisallowShowingAutomatically();
+
+    WebContentsAdapterClient *adapterClient = m_rwhv->adapterClient();
+    Q_ASSERT(adapterClient);
+    WebContentsAdapter *adapter = adapterClient->webContentsAdapter();
+    Q_ASSERT(adapter);
+
+    switch (command_id) {
+    case TouchSelectionMenuController::Cut:
+        adapter->cut();
+        break;
+    case TouchSelectionMenuController::Copy:
+        adapter->copy();
+        break;
+    case TouchSelectionMenuController::Paste:
+        adapter->paste();
+        break;
+    default:
+        NOTREACHED();
+        break;
+    }
+}
+
+void TouchSelectionControllerClientQt::RunContextMenu()
+{
+    gfx::RectF anchorRect = GetTouchSelectionController()->GetRectBetweenBounds();
+    gfx::PointF anchorPoint = gfx::PointF(anchorRect.CenterPoint().x(), anchorRect.y());
+
+    content::RenderWidgetHostImpl *host = m_rwhv->host();
+    host->ShowContextMenuAtPoint(gfx::ToRoundedPoint(anchorPoint),
+                                 ui::MENU_SOURCE_TOUCH_EDIT_MENU);
+
+    // Hide selection handles after getting rect-between-bounds from touch
+    // selection controller; otherwise, rect would be empty and the above
+    // calculations would be invalid.
+    GetTouchSelectionController()->HideAndDisallowShowingAutomatically();
+}
+
+void TouchSelectionControllerClientQt::DidStopFlinging()
+{
+    onScrollEnd();
+}
+
+void TouchSelectionControllerClientQt::UpdateClientSelectionBounds(const gfx::SelectionBound& start,
+                                                                   const gfx::SelectionBound& end)
+{
+    UpdateClientSelectionBounds(start, end, this, this);
+}
+
+void TouchSelectionControllerClientQt::UpdateClientSelectionBounds(const gfx::SelectionBound& start,
+                                                                   const gfx::SelectionBound& end,
+                                                                   ui::TouchSelectionControllerClient* client,
+                                                                   ui::TouchSelectionMenuClient* menu_client)
+{
+    Q_UNUSED(client);
+    Q_UNUSED(menu_client);
+
+    GetTouchSelectionController()->OnSelectionBoundsChanged(start, end);
+}
+
+void TouchSelectionControllerClientQt::InvalidateClient(ui::TouchSelectionControllerClient* client)
+{
+    Q_UNUSED(client);
+}
+
+ui::TouchSelectionController* TouchSelectionControllerClientQt::GetTouchSelectionController()
+{
+    return m_rwhv->getTouchSelectionController();
+}
+
+void TouchSelectionControllerClientQt::AddObserver(Observer* observer)
+{
+    Q_UNUSED(observer);
+}
+
+void TouchSelectionControllerClientQt::RemoveObserver(Observer* observer)
+{
+    Q_UNUSED(observer);
+}
+
+bool TouchSelectionControllerClientQt::SupportsAnimation() const
+{
+    return false;
+}
+
+void TouchSelectionControllerClientQt::SetNeedsAnimate()
+{
+    NOTREACHED();
+}
+
+void TouchSelectionControllerClientQt::MoveCaret(const gfx::PointF& position)
+{
+    content::mojom::FrameInputHandler *frameInputHandler = m_rwhv->getFrameInputHandler();
+    if (!frameInputHandler)
+        return;
+
+    frameInputHandler->MoveCaret(gfx::ToRoundedPoint(position));
+}
+
+void TouchSelectionControllerClientQt::MoveRangeSelectionExtent(const gfx::PointF& extent)
+{
+    content::mojom::FrameInputHandler *frameInputHandler = m_rwhv->getFrameInputHandler();
+    if (!frameInputHandler)
+        return;
+
+    frameInputHandler->MoveRangeSelectionExtent(gfx::ToRoundedPoint(extent));
+}
+
+void TouchSelectionControllerClientQt::SelectBetweenCoordinates(const gfx::PointF& base, const gfx::PointF& extent)
+{
+    content::mojom::FrameInputHandler *frameInputHandler = m_rwhv->getFrameInputHandler();
+    if (!frameInputHandler)
+        return;
+
+    frameInputHandler->SelectRange(gfx::ToRoundedPoint(base), gfx::ToRoundedPoint(extent));
+}
+
+void TouchSelectionControllerClientQt::OnSelectionEvent(ui::SelectionEventType event)
+{
+    switch (event) {
+    case ui::SELECTION_HANDLES_SHOWN:
+        m_menuRequested = true;
+        break;
+    case ui::INSERTION_HANDLE_SHOWN:
+        break;
+    case ui::SELECTION_HANDLES_CLEARED:
+    case ui::INSERTION_HANDLE_CLEARED:
+        m_menuRequested = false;
+        break;
+    case ui::SELECTION_HANDLE_DRAG_STARTED:
+    case ui::INSERTION_HANDLE_DRAG_STARTED:
+        m_handleDragInProgress = true;
+        break;
+    case ui::SELECTION_HANDLE_DRAG_STOPPED:
+    case ui::INSERTION_HANDLE_DRAG_STOPPED:
+        m_handleDragInProgress = false;
+        break;
+    case ui::SELECTION_HANDLES_MOVED:
+    case ui::INSERTION_HANDLE_MOVED:
+        break;
+    case ui::INSERTION_HANDLE_TAPPED:
+        m_menuRequested = !m_menuRequested;
+        break;
+    }
+
+    updateMenu();
+}
+
+void TouchSelectionControllerClientQt::OnDragUpdate(const gfx::PointF& position)
+{
+    Q_UNUSED(position);
+}
+
+std::unique_ptr<ui::TouchHandleDrawable> TouchSelectionControllerClientQt::CreateDrawable()
+{
+    return std::unique_ptr<ui::TouchHandleDrawable>(new TouchHandleDrawableQt(m_rwhv));
+}
+
+void TouchSelectionControllerClientQt::DidScroll()
+{
+}
+
+void TouchSelectionControllerClientQt::showMenu()
+{
+    gfx::RectF rect = GetTouchSelectionController()->GetRectBetweenBounds();
+    gfx::PointF origin = rect.origin();
+    gfx::PointF bottom_right = rect.bottom_right();
+
+    gfx::Vector2dF diagonal = bottom_right - origin;
+    gfx::SizeF size(diagonal.x(), diagonal.y());
+    gfx::RectF anchor_rect(origin, size);
+
+    // Calculate maximum handle image size;
+    gfx::SizeF max_handle_size = GetTouchSelectionController()->GetStartHandleRect().size();
+    max_handle_size.SetToMax(GetTouchSelectionController()->GetEndHandleRect().size());
+
+    WebContentsAdapterClient *adapterClient = m_rwhv->adapterClient();
+    Q_ASSERT(adapterClient);
+    adapterClient->showTouchSelectionMenu(m_menuController.get(),
+                                          QRect(toQt(gfx::ToEnclosingRect(anchor_rect))),
+                                          QSize(toQt(gfx::ToRoundedSize(max_handle_size))));
+    m_menuShowing = true;
+}
+
+void TouchSelectionControllerClientQt::hideMenu()
+{
+    WebContentsAdapterClient *adapterClient = m_rwhv->adapterClient();
+    Q_ASSERT(adapterClient);
+    adapterClient->hideTouchSelectionMenu();
+    m_menuShowing = false;
+}
+
+void TouchSelectionControllerClientQt::updateMenu()
+{
+    if (m_menuShowing)
+        hideMenu();
+
+    if (m_menuRequested && !m_touchDown &&
+            !m_scrollInProgress && !m_handleDragInProgress) {
+        showMenu();
+    }
+}
+
+} // namespace QtWebEngineCore