From 608f39244e17b2ae927c3311da8117de1923a0e3 Mon Sep 17 00:00:00 2001
From: "yifang.xiao" <yifang.xiao@outlook.com>
Date: Thu, 9 Dec 2021 16:02:29 +0800
Subject: [PATCH] single click distinguish with double click

---
 articleview.cc    |  2 +-
 articlewebview.cc | 70 ++++++++++++++++++++++++++++++-----------------
 articlewebview.hh |  6 ++--
 3 files changed, 50 insertions(+), 28 deletions(-)

diff --git a/articleview.cc b/articleview.cc
index 3a6611f6..4efbf78d 100644
--- a/articleview.cc
+++ b/articleview.cc
@@ -178,7 +178,7 @@ void ArticleView::emitJavascriptFinished(){
 //a better solution would be to replace it with callback etc.
 QString ArticleView::runJavaScriptSync(QWebEnginePage* frame, const QString& variable)
 {
-    qDebug(QString("runJavascriptScriptSync with :%1").arg(variable).toLatin1().data());
+    qDebug(QString("runJavascriptScriptSync:%1").arg(variable).toLatin1().data());
 
     QString result;
     //QEventLoop loop;
diff --git a/articlewebview.cc b/articlewebview.cc
index 8e80057a..c3b9b0b5 100644
--- a/articlewebview.cc
+++ b/articlewebview.cc
@@ -5,6 +5,7 @@
 #include <QMouseEvent>
 #include <QWebEngineView>
 #include <QApplication>
+#include <QTimer>
 
 #ifdef Q_OS_WIN32
 #include <qt_windows.h>
@@ -47,46 +48,66 @@ bool ArticleWebView::event( QEvent * event )
 bool ArticleWebView::eventFilter(QObject *obj, QEvent *ev)
 {
     if (ev->type() == QEvent::MouseButtonDblClick) {
-        QMouseEvent *pe = static_cast<QMouseEvent *>(ev);
-        mouseDoubleClickEvent(pe);
-        return true;
+        //QMouseEvent *pe = static_cast<QMouseEvent *>(ev);
+        firstClicked=false;
+    }
+    if (ev->type() == QEvent::MouseButtonPress) {
+        firstClicked=true;
+    }
+    if (ev->type() == QEvent::MouseButtonRelease) {
+        QMouseEvent *pe = static_cast<QMouseEvent *>(ev);
+        mouseReleaseEvent(pe);
+        if(firstClicked){
+            QTimer::singleShot(QApplication::doubleClickInterval(),this,[=](){
+                singleClickAction(pe);
+            });
+            return true;
+        }
+        else{
+            doubleClickAction(pe);
+        }
     }
-    //    if (ev->type() == QEvent::MouseButtonPress) {
-    //        QMouseEvent *pe = static_cast<QMouseEvent *>(ev);
-    //        mousePressEvent(pe);
-    //        return true;
-    //    }
-    //    if (ev->type() == QEvent::MouseButtonRelease) {
-    //        QMouseEvent *pe = static_cast<QMouseEvent *>(ev);
-    //        mouseReleaseEvent(pe);
-    //        return true;
-    //    }
     if (ev->type() == QEvent::Wheel) {
         QWheelEvent *pe = static_cast<QWheelEvent *>(ev);
         wheelEvent(pe);
-        return true;
+        //return true;
     }
     if (ev->type() == QEvent::FocusIn) {
         QFocusEvent *pe = static_cast<QFocusEvent *>(ev);
         focusInEvent(pe);
-        return true;
+        //return true;
     }
 
     return QWebEngineView::eventFilter(obj, ev);
 }
 
-void ArticleWebView::mousePressEvent( QMouseEvent * event )
+void ArticleWebView::singleClickAction( QMouseEvent * event )
 {
+  if(!firstClicked)
+    return;
   if ( event->buttons() & Qt::MidButton )
     midButtonPressed = true;
 
-  QWebEngineView::mousePressEvent(event);
+  //QWebEngineView::mousePressEvent(event);
 
-  qDebug() << event->buttons();
-  if (selectionBySingleClick && (event->buttons() & Qt::LeftButton)) {
-      //   findText(""); // clear the selection first, if any
-      //    QMouseEvent ev( QEvent::MouseButtonDblClick, event->pos(), Qt::LeftButton, Qt::LeftButton, event->modifiers() );
-      //    QApplication::sendEvent( page(), &ev );
+  if (selectionBySingleClick && (event->button() & Qt::LeftButton)) {
+         findText(""); // clear the selection first, if any
+         page()->runJavaScript(QString(""
+"  var s = window.getSelection();  "
+"  var range = s.getRangeAt(0);  "
+"  var node = s.anchorNode;  "
+"  while (range.toString().indexOf(' ') != 0) {  "
+"    range.setStart(node, (range.startOffset - 1));  "
+"  }  "
+"  range.setStart(node, range.startOffset + 1);  "
+"  do {  "
+"    range.setEnd(node, range.endOffset + 1);  "
+"  }  "
+"  while (range.toString().indexOf(' ') == -1 && range.toString().trim() != '');  "
+"  var str = range.toString().trim();  "
+"  console.log(str);"));
+//         QMouseEvent ev( QEvent::MouseButtonDblClick, event->pos(), Qt::LeftButton, Qt::LeftButton, event->modifiers() );
+//         QApplication::sendEvent(page(), &ev );
   }
 }
 
@@ -94,16 +115,15 @@ void ArticleWebView::mouseReleaseEvent( QMouseEvent * event )
 {
   bool noMidButton = !( event->buttons() & Qt::MidButton );
 
-  QWebEngineView::mouseReleaseEvent( event );
+  //QWebEngineView::mouseReleaseEvent( event );
 
   if ( midButtonPressed & noMidButton )
     midButtonPressed = false;
 }
 
-void ArticleWebView::mouseDoubleClickEvent( QMouseEvent * event )
+void ArticleWebView::doubleClickAction( QMouseEvent * event )
 {
     //QWebEngineView::mouseDoubleClickEvent( event );
-    //todo
 
     int scrollBarWidth = 0;
     int scrollBarHeight = 0;
diff --git a/articlewebview.hh b/articlewebview.hh
index f9c50d76..9fffae31 100644
--- a/articlewebview.hh
+++ b/articlewebview.hh
@@ -48,9 +48,9 @@ public:
 protected:
 
   bool event( QEvent * event );
-  void mousePressEvent( QMouseEvent * event );
+  void singleClickAction( QMouseEvent * event );
   void mouseReleaseEvent( QMouseEvent * event );
-  void mouseDoubleClickEvent( QMouseEvent * event );
+  void doubleClickAction( QMouseEvent * event );
   void focusInEvent( QFocusEvent * event );
   void wheelEvent( QWheelEvent * event );
 
@@ -61,6 +61,8 @@ private:
   bool midButtonPressed;
   bool selectionBySingleClick;
   bool showInspectorDirectly;
+
+  bool firstClicked;
 };
 
 #endif