1 files changed, 171 insertions, 0 deletions
diff --git a/src/core/find_text_helper.cpp b/src/core/find_text_helper.cpp
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+++ b/src/core/find_text_helper.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2019 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 "find_text_helper.h"
+#include "qwebenginefindtextresult.h"
+#include "type_conversion.h"
+#include "web_contents_adapter_client.h"
+
+#include "content/public/browser/web_contents.h"
+#include "third_party/blink/public/mojom/frame/find_in_page.mojom.h"
+
+namespace QtWebEngineCore {
+
+// static
+int FindTextHelper::m_findRequestIdCounter = -1;
+
+FindTextHelper::FindTextHelper(content::WebContents *webContents, WebContentsAdapterClient *viewClient)
+    : m_webContents(webContents)
+    , m_viewClient(viewClient)
+    , m_currentFindRequestId(m_findRequestIdCounter++)
+    , m_lastCompletedFindRequestId(m_currentFindRequestId)
+{
+}
+
+FindTextHelper::~FindTextHelper()
+{
+    if (isFindTextInProgress())
+        stopFinding();
+}
+
+void FindTextHelper::startFinding(const QString &findText, bool caseSensitively, bool findBackward, const QWebEngineCallback<bool> resultCallback)
+{
+    if (findText.isEmpty()) {
+        stopFinding();
+        m_viewClient->findTextFinished(QWebEngineFindTextResult());
+        m_widgetCallbacks.invokeEmpty(resultCallback);
+        return;
+    }
+
+    startFinding(findText, caseSensitively, findBackward);
+    m_widgetCallbacks.registerCallback(m_currentFindRequestId, resultCallback);
+}
+
+void FindTextHelper::startFinding(const QString &findText, bool caseSensitively, bool findBackward, const QJSValue &resultCallback)
+{
+    if (findText.isEmpty()) {
+        stopFinding();
+        m_viewClient->findTextFinished(QWebEngineFindTextResult());
+        if (!resultCallback.isUndefined()) {
+            QJSValueList args;
+            args.append(QJSValue(0));
+            const_cast<QJSValue&>(resultCallback).call(args);
+        }
+        return;
+    }
+
+    startFinding(findText, caseSensitively, findBackward);
+    if (!resultCallback.isUndefined())
+        m_quickCallbacks.insert(m_currentFindRequestId, resultCallback);
+}
+
+void FindTextHelper::startFinding(const QString &findText, bool caseSensitively, bool findBackward)
+{
+    if (findText.isEmpty()) {
+        stopFinding();
+        return;
+    }
+
+    if (m_currentFindRequestId > m_lastCompletedFindRequestId) {
+        // There are cases where the render process will overwrite a previous request
+        // with the new search and we'll have a dangling callback, leaving the application
+        // waiting for it forever.
+        // Assume that any unfinished find has been unsuccessful when a new one is started
+        // to cover that case.
+        m_viewClient->findTextFinished(QWebEngineFindTextResult());
+        invokeResultCallback(m_currentFindRequestId, 0);
+    }
+
+    blink::mojom::FindOptionsPtr options = blink::mojom::FindOptions::New();
+    options->forward = !findBackward;
+    options->match_case = caseSensitively;
+    options->find_next = findText == m_previousFindText;
+    m_previousFindText = findText;
+
+    m_currentFindRequestId = m_findRequestIdCounter++;
+    m_webContents->Find(m_currentFindRequestId, toString16(findText), std::move(options));
+}
+
+void FindTextHelper::stopFinding()
+{
+    m_lastCompletedFindRequestId = m_currentFindRequestId;
+    m_previousFindText = QString();
+    m_webContents->StopFinding(content::STOP_FIND_ACTION_KEEP_SELECTION);
+}
+
+bool FindTextHelper::isFindTextInProgress() const
+{
+    return m_currentFindRequestId != m_lastCompletedFindRequestId;
+}
+
+void FindTextHelper::handleFindReply(content::WebContents *source, int requestId, int numberOfMatches,
+                                     const gfx::Rect &selectionRect, int activeMatchOrdinal, bool finalUpdate)
+{
+    Q_UNUSED(selectionRect);
+
+    Q_ASSERT(source == m_webContents);
+
+    if (!finalUpdate || requestId <= m_lastCompletedFindRequestId)
+        return;
+
+    Q_ASSERT(m_currentFindRequestId == requestId);
+    m_lastCompletedFindRequestId = requestId;
+    m_viewClient->findTextFinished(QWebEngineFindTextResult(numberOfMatches, activeMatchOrdinal));
+    invokeResultCallback(requestId, numberOfMatches);
+}
+
+void FindTextHelper::handleLoadCommitted()
+{
+    // Make sure that we don't set the findNext WebFindOptions on a new frame.
+    m_previousFindText = QString();
+}
+
+void FindTextHelper::invokeResultCallback(int requestId, int numberOfMatches)
+{
+    if (m_quickCallbacks.contains(requestId)) {
+        QJSValue resultCallback = m_quickCallbacks.take(requestId);
+        QJSValueList args;
+        args.append(QJSValue(numberOfMatches));
+        resultCallback.call(args);
+    } else {
+        m_widgetCallbacks.invoke(requestId, numberOfMatches > 0);
+    }
+}
+
+} // namespace QtWebEngineCore