optimize: use QTextEdit::insertFromMimeData to process pasting images instead of manipulating context menu

ui/widgets/CMakeLists.txt

@@ -18,6 +18,8 @@ target_sources(squawk PRIVATE
   newcontact.ui
   room.cpp
   room.h
+  messagetextedit.cpp
+  messagetextedit.h
   )
 
 add_subdirectory(vcard)

ui/widgets/conversation.cpp

@@ -17,6 +17,7 @@
  */
 
 #include "conversation.h"
+#include "messagetextedit.h"
 #include "ui_conversation.h"
 
 #include <QDebug>
@@ -51,7 +52,6 @@ Conversation::Conversation(bool muc, Models::Account* acc, Models::Element* el,
     delegate(new MessageDelegate(this)),
     manualSliderChange(false),
     tsb(QApplication::style()->styleHint(QStyle::SH_ScrollBar_Transient) == 1),
-    pasteImageAction(new QAction(tr("Paste Image"), this)),
     shadow(10, 1, Qt::black, this),
     contextMenu(new QMenu())
 {
@@ -80,7 +80,8 @@ Conversation::Conversation(bool muc, Models::Account* acc, Models::Element* el,
     statusLabel = m_ui->statusLabel;
     
     connect(&ker, &KeyEnterReceiver::enterPressed, this, &Conversation::onEnterPressed);
-    connect(&ker, &KeyEnterReceiver::imagePasted, this, &Conversation::onImagePasted);
+    connect(m_ui->messageEditor, &MessageTextEdit::imageInserted, this, &Conversation::onImageInserted);
+    connect(m_ui->messageEditor, &MessageTextEdit::fileInserted, this, &Conversation::onFileInserted);
     connect(m_ui->sendButton, &QPushButton::clicked, this, &Conversation::onEnterPressed);
     connect(m_ui->attachButton, &QPushButton::clicked, this, &Conversation::onAttach);
     connect(m_ui->clearButton, &QPushButton::clicked, this, &Conversation::onClearButton);
@@ -88,10 +89,8 @@ Conversation::Conversation(bool muc, Models::Account* acc, Models::Element* el,
             this, &Conversation::onTextEditDocSizeChanged);
     
     m_ui->messageEditor->installEventFilter(&ker);
-    m_ui->messageEditor->setContextMenuPolicy(Qt::CustomContextMenu);
 
-    connect(m_ui->messageEditor, &QTextEdit::customContextMenuRequested, this, &Conversation::onMessageEditorContext);
+
-    connect(pasteImageAction, &QAction::triggered, this, &Conversation::onImagePasted);
 
     //line->setAutoFillBackground(false);
     //if (testAttribute(Qt::WA_TranslucentBackground)) {
@@ -192,20 +191,10 @@ bool KeyEnterReceiver::eventFilter(QObject* obj, QEvent* event)
                 }
             }
         }
-        if (k == Qt::Key_V && key->modifiers() & Qt::CTRL) {
-            if (Conversation::checkClipboardImage()) {
-                emit imagePasted();
-                return true;
-            }
-        }
     }
     return QObject::eventFilter(obj, event);
 }
 
-bool Conversation::checkClipboardImage() {
-    return !QApplication::clipboard()->image().isNull();
-}
-
 QString Conversation::getPalResource() const
 {
     return activePalResource;
@@ -237,9 +226,8 @@ void Conversation::onEnterPressed()
     }
 }
 
-void Conversation::onImagePasted()
+void Conversation::onImageInserted(const QImage& image)
 {
-    QImage image = QApplication::clipboard()->image();
     if (image.isNull()) {
         return;
     }
@@ -255,6 +243,11 @@ void Conversation::onImagePasted()
     // See Core::NetworkAccess::onUploadFinished.
 }
 
+void Conversation::onFileInserted(const QString& localPath)
+{
+    addAttachedFile(localPath);
+}
+
 void Conversation::onAttach()
 {
     QFileDialog* d = new QFileDialog(this, tr("Chose a file to send"));
@@ -484,14 +477,3 @@ void Conversation::onFeedContext(const QPoint& pos)
         }
     }
 }
-
-void Conversation::onMessageEditorContext(const QPoint& pos)
-{
-    pasteImageAction->setEnabled(Conversation::checkClipboardImage());
-
-    QMenu *editorMenu = m_ui->messageEditor->createStandardContextMenu();
-    editorMenu->addSeparator();
-    editorMenu->addAction(pasteImageAction);
-
-    editorMenu->exec(this->m_ui->messageEditor->mapToGlobal(pos));
-}

ui/widgets/conversation.h

@@ -60,7 +60,6 @@ protected:
     
 signals:
     void enterPressed();
-    void imagePasted();
 };
 
 class Conversation : public QWidget
@@ -78,7 +77,6 @@ public:
     void setPalResource(const QString& res);
     virtual void setAvatar(const QString& path);
     void setFeedFrames(bool top, bool right, bool bottom, bool left);
-    static bool checkClipboardImage();
     
 signals:
     void sendMessage(const Shared::Message& message);
@@ -104,7 +102,8 @@ protected:
     
 protected slots:
     void onEnterPressed();
-    void onImagePasted();
+    void onImageInserted(const QImage& image);
+    void onFileInserted(const QString& localPath);
     void onAttach();
     void onFileSelected();
     void onBadgeClose();
@@ -114,7 +113,6 @@ protected slots:
     void onFeedMessage(const Shared::Message& msg);
     void positionShadow();
     void onFeedContext(const QPoint &pos);
-    void onMessageEditorContext(const QPoint &pos);
     
 public:
     const bool isMuc;
@@ -136,8 +134,6 @@ protected:
     MessageDelegate* delegate;
     bool manualSliderChange;
     bool tsb;           //transient scroll bars
-    
-    QAction* pasteImageAction;
 
     ShadowOverlay shadow;
     QMenu* contextMenu;

ui/widgets/conversation.ui

@@ -351,7 +351,7 @@
        </widget>
       </item>
       <item>
-       <widget class="QTextEdit" name="messageEditor">
+       <widget class="MessageTextEdit" name="messageEditor">
         <property name="enabled">
          <bool>true</bool>
         </property>
@@ -419,6 +419,13 @@ p, li { white-space: pre-wrap; }
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>MessageTextEdit</class>
+   <extends>QTextEdit</extends>
+   <header location="global">ui/widgets/conversation.h</header>
+  </customwidget>
+ </customwidgets>
  <resources>
   <include location="../../resources/resources.qrc"/>
  </resources>

ui/widgets/messagetextedit.cpp

@@ -0,0 +1,27 @@
+#include <QMimeData>
+#include "messagetextedit.h"
+
+bool MessageTextEdit::canInsertFromMimeData(const QMimeData* source) const
+{
+    return source->hasImage() || source->hasUrls() || source->hasText();
+}
+
+void MessageTextEdit::insertFromMimeData(const QMimeData* source)
+{
+    if (source == nullptr) {
+        return;
+    }
+
+    if (source->hasImage()) {
+        emit imageInserted(source->imageData().value<QImage>());
+    } else if (source->hasUrls()) {
+        QList<QUrl> urls = source->urls();
+        for (const QUrl& url : qAsConst(urls)) {
+            if (url.isLocalFile()) {
+                emit fileInserted(url.toLocalFile());
+            }
+        }
+    } else {
+        insertPlainText(source->text());
+    }
+}

ui/widgets/messagetextedit.h

@@ -0,0 +1,30 @@
+#ifndef MESSAGETEXTEDIT_H
+#define MESSAGETEXTEDIT_H
+
+#include <QTextEdit>
+#include <QObject>
+#include <QWidget>
+
+namespace Ui
+{
+class MessageTextEdit;
+}
+
+class MessageTextEdit : public QTextEdit
+{
+    Q_OBJECT
+public:
+    explicit MessageTextEdit(QWidget *parent = nullptr) : QTextEdit(parent) {}
+    explicit MessageTextEdit(const QString &text, QWidget *parent = nullptr) : QTextEdit(text, parent) {}
+
+signals:
+    void imageInserted(const QImage& image);
+    void fileInserted(const QString& localPath);
+
+protected:
+    bool canInsertFromMimeData(const QMimeData* source) const override;
+    void insertFromMimeData(const QMimeData* source) override;
+
+};
+
+#endif // MESSAGETEXTEDIT_H