Implement QWebEnginePage::findText

A few changes to the API:
- Return the success result asynchronously.
- FindWrapsAroundDocument and HighlightAllOccurrences are enabled by
  defaults and cannot be disabled.
- Found text isn't updating the selection on the page like QtWebKit
  did, but triggers a separate state not available. A find count and
  current index could be exposed, but isn't in this case to keep the
  API delta lower.

This also adds the possibility to pass bool results through the
CallbackDirectory and add a new tst_QWebEnginePage::findTextResult
test since the old test relied on the selection to be updated when
the searched text is found.

Change-Id: I8189b5aea8d832df183c6c1ae03e3f08198a9c45
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

5 files changed, 59 insertions, 6 deletions

diff --git a/src/webenginewidgets/api/qwebenginepage.cpp b/src/webenginewidgets/api/qwebenginepage.cpp
index 760a8eff7..ca1c203dd 100644
--- a/src/webenginewidgets/api/qwebenginepage.cpp
+++ b/src/webenginewidgets/api/qwebenginepage.cpp
@@ -57,6 +57,9 @@ CallbackDirectory::~CallbackDirectory()
         case CallbackSharedDataPointer::String:
             (*sharedPtr.stringCallback)(QString());
             break;
+        case CallbackSharedDataPointer::Bool:
+            (*sharedPtr.boolCallback)(false);
+            break;
         default:
             Q_UNREACHABLE();
         }
@@ -73,6 +76,11 @@ void CallbackDirectory::registerCallback(quint64 requestId, const QExplicitlySha
     m_callbackMap.insert(requestId, CallbackSharedDataPointer(callback.data()));
 }
 
+void CallbackDirectory::registerCallback(quint64 requestId, const QExplicitlySharedDataPointer<BoolCallback> &callback)
+{
+    m_callbackMap.insert(requestId, CallbackSharedDataPointer(callback.data()));
+}
+
 void CallbackDirectory::invoke(quint64 requestId, const QVariant &result)
 {
     CallbackSharedDataPointer sharedPtr = m_callbackMap.take(requestId);
@@ -91,6 +99,15 @@ void CallbackDirectory::invoke(quint64 requestId, const QString &result)
     }
 }
 
+void CallbackDirectory::invoke(quint64 requestId, bool result)
+{
+    CallbackSharedDataPointer sharedPtr = m_callbackMap.take(requestId);
+    if (sharedPtr) {
+        Q_ASSERT(sharedPtr.type == CallbackSharedDataPointer::Bool);
+        (*sharedPtr.boolCallback)(result);
+    }
+}
+
 void CallbackDirectory::CallbackSharedDataPointer::doRef()
 {
     switch (type) {
@@ -102,6 +119,9 @@ void CallbackDirectory::CallbackSharedDataPointer::doRef()
     case String:
         stringCallback->ref.ref();
         break;
+    case Bool:
+        boolCallback->ref.ref();
+        break;
     }
 }
 
@@ -118,6 +138,10 @@ void CallbackDirectory::CallbackSharedDataPointer::doDeref()
         if (!stringCallback->ref.deref())
             delete stringCallback;
         break;
+    case Bool:
+        if (!boolCallback->ref.deref())
+            delete boolCallback;
+        break;
     }
 }
 
@@ -251,6 +275,11 @@ void QWebEnginePagePrivate::didFetchDocumentInnerText(quint64 requestId, const Q
     m_callbacks.invoke(requestId, result);
 }
 
+void QWebEnginePagePrivate::didFindText(quint64 requestId, int matchCount)
+{
+    m_callbacks.invoke(requestId, matchCount > 0);
+}
+
 void QWebEnginePagePrivate::updateAction(QWebEnginePage::WebAction action) const
 {
 #ifdef QT_NO_ACTION
@@ -414,6 +443,20 @@ void QWebEnginePage::triggerAction(WebAction action, bool)
     }
 }
 
+void QWebEnginePage::findText(const QString &subString, FindFlags options, const QWebEngineCallback<bool> &resultCallback)
+{
+    Q_D(QWebEnginePage);
+    if (subString.isEmpty()) {
+        d->adapter->stopFinding();
+        if (resultCallback.d)
+            (*resultCallback.d)(false);
+    } else {
+        quint64 requestId = d->adapter->findText(subString, options & FindCaseSensitively, options & FindBackward);
+        if (resultCallback.d)
+            d->m_callbacks.registerCallback(requestId, resultCallback.d);
+    }
+}
+
 void QWebEnginePage::setViewportSize(const QSize &size) const
 {
     Q_UNUSED(size)
diff --git a/src/webenginewidgets/api/qwebenginepage.h b/src/webenginewidgets/api/qwebenginepage.h
index f89115579..aac37bc99 100644
--- a/src/webenginewidgets/api/qwebenginepage.h
+++ b/src/webenginewidgets/api/qwebenginepage.h
@@ -76,6 +76,7 @@ class QWebEngineCallback {
 public:
     template <typename F>
     QWebEngineCallback(F f) : d(new QtWebEnginePrivate::QWebEngineCallbackPrivate<T, F>(f)) { }
+    QWebEngineCallback() { }
 private:
     QExplicitlySharedDataPointer<QtWebEnginePrivate::QWebEngineCallbackPrivateBase<T> > d;
     friend class QWebEnginePage;
@@ -249,8 +250,6 @@ public:
     enum FindFlag {
         FindBackward = 1,
         FindCaseSensitively = 2,
-        FindWrapsAroundDocument = 4,
-        HighlightAllOccurrences = 8
     };
     Q_DECLARE_FLAGS(FindFlags, FindFlag)
 
@@ -368,7 +367,7 @@ public:
 
     QVariant inputMethodQuery(Qt::InputMethodQuery property) const;
 
-    bool findText(const QString &subString, FindFlags options = 0);
+    void findText(const QString &subString, FindFlags options = 0, const QWebEngineCallback<bool> &resultCallback = QWebEngineCallback<bool>());
 
     void setForwardUnsupportedContent(bool forward);
     bool forwardUnsupportedContent() const;
diff --git a/src/webenginewidgets/api/qwebenginepage_p.h b/src/webenginewidgets/api/qwebenginepage_p.h
index e6113b795..ed21c3816 100644
--- a/src/webenginewidgets/api/qwebenginepage_p.h
+++ b/src/webenginewidgets/api/qwebenginepage_p.h
@@ -62,27 +62,33 @@ class CallbackDirectory {
 public:
     typedef QtWebEnginePrivate::QWebEngineCallbackPrivateBase<const QVariant&> VariantCallback;
     typedef QtWebEnginePrivate::QWebEngineCallbackPrivateBase<const QString&> StringCallback;
+    typedef QtWebEnginePrivate::QWebEngineCallbackPrivateBase<bool> BoolCallback;
 
     ~CallbackDirectory();
     void registerCallback(quint64 requestId, const QExplicitlySharedDataPointer<VariantCallback> &callback);
     void registerCallback(quint64 requestId, const QExplicitlySharedDataPointer<StringCallback> &callback);
+    void registerCallback(quint64 requestId, const QExplicitlySharedDataPointer<BoolCallback> &callback);
     void invoke(quint64 requestId, const QVariant &result);
     void invoke(quint64 requestId, const QString &result);
+    void invoke(quint64 requestId, bool result);
 
 private:
     struct CallbackSharedDataPointer {
         enum {
             None,
             Variant,
-            String
+            String,
+            Bool
         } type;
         union {
             VariantCallback *variantCallback;
             StringCallback *stringCallback;
+            BoolCallback *boolCallback;
         };
         CallbackSharedDataPointer() : type(None) { }
         CallbackSharedDataPointer(VariantCallback *callback) : type(Variant), variantCallback(callback) { callback->ref.ref(); }
         CallbackSharedDataPointer(StringCallback *callback) : type(String), stringCallback(callback) { callback->ref.ref(); }
+        CallbackSharedDataPointer(BoolCallback *callback) : type(Bool), boolCallback(callback) { callback->ref.ref(); }
         CallbackSharedDataPointer(const CallbackSharedDataPointer &other) : type(other.type), variantCallback(other.variantCallback) { doRef(); }
         ~CallbackSharedDataPointer() { doDeref(); }
         operator bool () const { return type != None; }
@@ -125,8 +131,8 @@ public:
     virtual void didRunJavaScript(quint64 requestId, const QVariant& result) Q_DECL_OVERRIDE;
     virtual void didFetchDocumentMarkup(quint64 requestId, const QString& result) Q_DECL_OVERRIDE;
     virtual void didFetchDocumentInnerText(quint64 requestId, const QString& result) Q_DECL_OVERRIDE;
+    virtual void didFindText(quint64 requestId, int matchCount) Q_DECL_OVERRIDE;
     virtual void passOnFocus(bool reverse) Q_DECL_OVERRIDE { Q_UNUSED(reverse); };
-
     virtual void javaScriptConsoleMessage(int level, const QString& message, int lineNumber, const QString& sourceID) Q_DECL_OVERRIDE;
 
     void updateAction(QWebEnginePage::WebAction) const;
diff --git a/src/webenginewidgets/api/qwebengineview.cpp b/src/webenginewidgets/api/qwebengineview.cpp
index e5237bc72..3d884f464 100644
--- a/src/webenginewidgets/api/qwebengineview.cpp
+++ b/src/webenginewidgets/api/qwebengineview.cpp
@@ -177,6 +177,11 @@ void QWebEngineView::triggerPageAction(QWebEnginePage::WebAction action, bool ch
     page()->triggerAction(action, checked);
 }
 
+void QWebEngineView::findText(const QString &subString, QWebEnginePage::FindFlags options, const QWebEngineCallback<bool> &resultCallback)
+{
+    page()->findText(subString, options, resultCallback);
+}
+
 void QWebEngineView::stop()
 {
     page()->triggerAction(QWebEnginePage::Stop);
diff --git a/src/webenginewidgets/api/qwebengineview.h b/src/webenginewidgets/api/qwebengineview.h
index 46b144d14..836e61be3 100644
--- a/src/webenginewidgets/api/qwebengineview.h
+++ b/src/webenginewidgets/api/qwebengineview.h
@@ -105,7 +105,7 @@ public:
     void setRenderHints(QPainter::RenderHints hints);
     void setRenderHint(QPainter::RenderHint hint, bool enabled = true);
 
-    bool findText(const QString& subString, QWebEnginePage::FindFlags options = 0);
+    void findText(const QString &subString, QWebEnginePage::FindFlags options = 0, const QWebEngineCallback<bool> &resultCallback = QWebEngineCallback<bool>());
 
     virtual QSize sizeHint() const { return QSize(800, 600); }