MdEditor: support copy in-place preview

src/utils/vclipboardutils.cpp

@@ -35,6 +35,20 @@ void VClipboardUtils::setImageLoop(QClipboard *p_clipboard,
     }
 }
 
+void VClipboardUtils::setImageToClipboard(QClipboard *p_clipboard,
+                                          const QPixmap &p_image,
+                                          QClipboard::Mode p_mode)
+{
+    QImage img(p_image.toImage());
+
+#if defined(Q_OS_WIN)
+    // On Windows, setImage() may fail. We will repeatedly retry until succeed.
+    setImageLoop(p_clipboard, img, p_mode);
+#else
+    p_clipboard->setImage(img, p_mode);
+#endif
+}
+
 void VClipboardUtils::setMimeDataToClipboard(QClipboard *p_clipboard,
                                              QMimeData *p_mimeData,
                                              QClipboard::Mode p_mode)

src/utils/vclipboardutils.h

@@ -2,6 +2,7 @@
 #define VCLIPBOARDUTILS_H
 
 #include <QImage>
+#include <QPixmap>
 #include <QClipboard>
 
 class QMimeData;
@@ -14,6 +15,10 @@ public:
                                     const QImage &p_image,
                                     QClipboard::Mode p_mode = QClipboard::Clipboard);
 
+    static void setImageToClipboard(QClipboard *p_clipboard,
+                                    const QPixmap &p_image,
+                                    QClipboard::Mode p_mode = QClipboard::Clipboard);
+
     static void setImageAndLinkToClipboard(QClipboard *p_clipboard,
                                            const QImage &p_image,
                                            const QString &p_link,

src/vmdeditor.cpp

@@ -303,7 +303,9 @@ void VMdEditor::contextMenuEvent(QContextMenuEvent *p_event)
         if (textCursor().hasSelection()) {
             initCopyAsMenu(actions.isEmpty() ? NULL : actions.last(), menu.data());
         } else {
-            initLinkMenu(actions.isEmpty() ? NULL : actions[0], menu.data(), p_event->pos());
+            initLinkAndPreviewMenu(actions.isEmpty() ? NULL : actions[0],
+                                   menu.data(),
+                                   p_event->pos());
 
             QAction *saveExitAct = new QAction(VIconUtils::menuIcon(":/resources/icons/save_exit.svg"),
                                                tr("&Save Changes And Read"),
@@ -1462,7 +1464,7 @@ int VMdEditor::lineNumberAreaWidth() const
     return VTextEdit::lineNumberAreaWidth();
 }
 
-void VMdEditor::initLinkMenu(QAction *p_before, QMenu *p_menu, const QPoint &p_pos)
+void VMdEditor::initLinkAndPreviewMenu(QAction *p_before, QMenu *p_menu, const QPoint &p_pos)
 {
     QTextCursor cursor = cursorForPosition(p_pos);
     int pos = cursor.position();
@@ -1536,6 +1538,9 @@ void VMdEditor::initLinkMenu(QAction *p_before, QMenu *p_menu, const QPoint &p_p
                             }
                         });
                 p_menu->insertAction(p_before, copyImageAct);
+            } else {
+                // Copy in-place preview.
+                initInPlacePreviewMenu(p_before, p_menu, block, pos);
             }
 
             p_menu->insertSeparator(p_before ? p_before : NULL);
@@ -1560,10 +1565,7 @@ void VMdEditor::initLinkMenu(QAction *p_before, QMenu *p_menu, const QPoint &p_p
         }
     }
 
-    if (linkText.isEmpty()) {
+    if (!linkText.isEmpty()) {
-        return;
-    }
-
         QString linkUrl = VUtils::linkUrlToPath(m_file->fetchBasePath(), linkText);
         bool isLocalFile = QFileInfo::exists(linkUrl);
 
@@ -1599,4 +1601,55 @@ void VMdEditor::initLinkMenu(QAction *p_before, QMenu *p_menu, const QPoint &p_p
         }
 
         p_menu->insertSeparator(p_before ? p_before : NULL);
+        return;
+    }
+
+    if (initInPlacePreviewMenu(p_before, p_menu, block, pos)) {
+        p_menu->insertSeparator(p_before ? p_before : NULL);
+    }
+}
+
+bool VMdEditor::initInPlacePreviewMenu(QAction *p_before,
+                                       QMenu *p_menu,
+                                       const QTextBlock &p_block,
+                                       int p_pos)
+{
+    VTextBlockData *data = VTextBlockData::blockData(p_block);
+    if (!data) {
+        return false;
+    }
+
+    const QVector<VPreviewInfo *> &previews = data->getPreviews();
+    if (previews.isEmpty()) {
+        return false;
+    }
+
+    QPixmap image;
+    int pib = p_pos - p_block.position();
+    for (auto info : previews) {
+        const VPreviewedImageInfo &pii = info->m_imageInfo;
+        if (pii.contains(pib)) {
+            const QPixmap *img = findImage(pii.m_imageName);
+            if (img) {
+                image = *img;
+            }
+
+            break;
+        }
+    }
+
+    if (image.isNull()) {
+        return false;
+    }
+
+    QAction *copyImageAct = new QAction(tr("Copy In-Place Preview"), p_menu);
+    connect(copyImageAct, &QAction::triggered,
+            this, [this, image]() {
+                QClipboard *clipboard = QApplication::clipboard();
+                VClipboardUtils::setImageToClipboard(clipboard,
+                                                     image,
+                                                     QClipboard::Clipboard);
+            });
+    p_menu->insertAction(p_before, copyImageAct);
+    return true;
 }

src/vmdeditor.h

@@ -277,7 +277,12 @@ private:
 
     void initPasteAsBlockQuoteMenu(QMenu *p_menu);
 
-    void initLinkMenu(QAction *p_before, QMenu *p_menu, const QPoint &p_pos);
+    void initLinkAndPreviewMenu(QAction *p_before, QMenu *p_menu, const QPoint &p_pos);
+
+    bool initInPlacePreviewMenu(QAction *p_before,
+                                QMenu *p_menu,
+                                const QTextBlock &p_block,
+                                int p_pos);
 
     void insertImageLink(const QString &p_text, const QString &p_url);
 

src/vtextblockdata.h

@@ -68,6 +68,11 @@ struct VPreviewedImageInfo
         return !(m_endPos <= a.m_startPos || m_startPos >= a.m_endPos);
     }
 
+    bool contains(int p_positionInBlock) const
+    {
+        return p_positionInBlock >= m_startPos && p_positionInBlock < m_endPos;
+    }
+
     QString toString() const
     {
         return QString("previewed image (%1): [%2, %3] padding %4 inline %5 (%6,%7) bg(%8)")

src/vtextedit.cpp

@@ -362,6 +362,11 @@ QSize VTextEdit::imageSize(const QString &p_imageName) const
     return QSize();
 }
 
+const QPixmap *VTextEdit::findImage(const QString &p_name) const
+{
+    return m_imageMgr->findImage(p_name);
+}
+
 void VTextEdit::addImage(const QString &p_imageName, const QPixmap &p_image)
 {
     if (m_blockImageEnabled) {

src/vtextedit.h

@@ -49,6 +49,9 @@ public:
     // Get the image size from the resource manager.
     QSize imageSize(const QString &p_imageName) const;
 
+    // Get the image from the resource manager.
+    const QPixmap *findImage(const QString &p_name) const;
+
     // Add an image to the resources.
     void addImage(const QString &p_imageName, const QPixmap &p_image);