custom icon generate

dictionary.cc

@@ -18,8 +18,6 @@
 #include <QCryptographicHash>
 #include <QDateTime>
 #include "fsencoding.hh"
-#include "langcoder.hh"
-
 #include <QImage>
 #include <QPainter>
 #include <QRegularExpression>
@@ -275,6 +273,71 @@ bool Class::loadIconFromFile( QString const & _filename, bool isFullName )
   return false;
 }
 
+bool Class::loadIconFromText( QString const & text )
+{
+  if( text.isEmpty() )
+    return false;
+  QImage img( ":/icons/mdict-bg.png" );
+
+  if ( !img.isNull() )
+  {
+    int iconSize = 48;
+    //some icon is very large ,will crash the application.
+    img = img.scaledToWidth( iconSize );
+    QImage result( iconSize, iconSize, QImage::Format_ARGB32 );
+
+    int max = img.width() > img.height() ? img.width() : img.height();
+
+    QPainter painter( &result );
+    painter.setRenderHint(QPainter::RenderHint::Antialiasing);
+    painter.drawImage( QPoint( img.width() == max ? 0 : ( max - img.width() ) / 2,
+                               img.height() == max ? 0 : ( max - img.height() ) / 2 ),
+                       img );
+    QFont font = painter.font();
+    //the text should be a little smaller than the icon
+    font.setPixelSize( iconSize * 0.6 );
+    font.setWeight( QFont::Black );
+    painter.setFont( font );
+
+    const QRect rectangle = QRect( 0, 0, iconSize, iconSize );
+
+         //select a single char.
+    auto abbrName = getAbbrName( text );
+
+    painter.drawText( rectangle, Qt::AlignCenter, abbrName);
+
+    painter.end();
+
+    dictionaryNativeIcon = dictionaryIcon = QIcon( QPixmap::fromImage( result ) );
+
+    return !dictionaryIcon.isNull();
+  }
+  return false;
+}
+
+QString Class::getAbbrName( QString const & text )
+{
+  if(text.isEmpty())
+    return QString();
+  //remove whitespace
+  QString simplified = text;
+  simplified.remove(QRegularExpression("\\s"));
+  int index = qHash( simplified ) % simplified.size();
+
+  QString abbrName;
+  if( !Utils::isCJKChar( simplified.at( index ).unicode() ) )
+  {
+    // take two chars.
+    abbrName = simplified.mid( index, 2 );
+  }
+  else
+  {
+    abbrName = simplified.mid( index, 1 );
+  }
+
+  return abbrName;
+}
+
 void Class::isolateCSS( QString & css, QString const & wrapperSelector )
 {
   if( css.isEmpty() )

dictionary.hh

@@ -16,6 +16,7 @@
 #include "langcoder.hh"
 #include "config.hh"
 #include "utils.hh"
+#include <QString>
 
 /// Abstract dictionary-related stuff
 namespace Dictionary {
@@ -275,6 +276,9 @@ protected:
   // Load icon from filename directly if isFullName == true
   // else treat filename as name without extension
   bool loadIconFromFile( QString const & filename, bool isFullName = false );
+  bool loadIconFromText( QString const & text );
+
+  QString getAbbrName( QString const & text );
 
   /// Make css content usable only for articles from this dictionary
   void isolateCSS( QString & css, QString const & wrapperSelector = QString() );

ftshelpers.cc

@@ -468,12 +468,7 @@ void makeFTSIndex( BtreeIndexing::BtreeDictionary * dict, QAtomicInt & isCancell
 
 bool isCJKChar( ushort ch )
 {
-  if( ( ch >= 0x3400 && ch <= 0x9FFF )
+  return Utils::isCJKChar(ch);
-      || ( ch >= 0xF900 && ch <= 0xFAFF )
-      || ( ch >= 0xD800 && ch <= 0xDFFF ) )
-    return true;
-
-  return false;
 }
 
 void FTSResultsRequest::checkArticles( QVector< uint32_t > const & offsets,

mdx.cc

@@ -900,8 +900,9 @@ void MdxDictionary::loadIcon() noexcept
 
   // Remove the extension
   fileName.chop( 3 );
+  QString text = QString::fromStdString( dictionaryName );
 
-  if ( !loadIconFromFile( fileName ) )
+  if( !loadIconFromFile( fileName ) && !loadIconFromText( text ) )
   {
     // Use default icons
     dictionaryIcon = dictionaryNativeIcon = QIcon( ":/icons/mdict.png" );

resources.qrc

@@ -101,5 +101,6 @@
         <file>icons/closetab-hover.png</file>
         <file>icons/1downarrow.svg</file>
         <file>icons/wizard-selected.svg</file>
+        <file>icons/mdict-bg.png</file>
     </qresource>
 </RCC>

utils.hh

@@ -15,7 +15,15 @@
 
 namespace Utils
 {
+inline bool isCJKChar( ushort ch )
+{
+  if( ( ch >= 0x3400 && ch <= 0x9FFF )
+      || ( ch >= 0xF900 && ch <= 0xFAFF )
+      || ( ch >= 0xD800 && ch <= 0xDFFF ) )
+    return true;
 
+  return false;
+}
 /**
  * remove right end space
  */