image.hh

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/*
 * Dillo Widget
 *
 * Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
 * Copyright 2024-2025 Rodrigo Arias Mallo <rodarima@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __DW_IMAGE_HH__
#define __DW_IMAGE_HH__
 
#include "core.hh"
 
namespace dw {
 
class ImageMapsList
{
private:
   class ImageMap: public lout::object::Object {
      private:
         class ShapeAndLink: public lout::object::Object {
         public:
            core::Shape *shape;
            int link;
 
            ~ShapeAndLink () { if (shape) delete shape; };
         };
 
         lout::container::typed::List <ShapeAndLink> *shapesAndLinks;
         int defaultLink;
      public:
         ImageMap ();
         ~ImageMap ();
 
         void draw (core::View *view, core::style::Style *style, int x, int y);
         void add (core::Shape *shape, int link);
         void setDefaultLink (int link) { defaultLink = link; };
         int link (int x, int y);
   };
 
   lout::container::typed::HashTable <lout::object::Object, ImageMap>
      *imageMaps;
   ImageMap *currentMap;
 
public:
   ImageMapsList ();
   ~ImageMapsList ();
 
   void startNewMap (lout::object::Object *key);
   void addShapeToCurrentMap (core::Shape *shape, int link);
   void setCurrentMapDefaultLink (int link);
   void drawMap(lout::object::Object *key, core::View *view,
                core::style::Style *style, int x, int y);
   int link (lout::object::Object *key, int x, int y);
};
 
class Image: public core::Widget, public core::ImgRenderer
{
private:
   char *altText;
   core::Imgbuf *buffer;
   int bufWidth, bufHeight;
   int altTextWidth;
   bool clicking;
   int currLink;
   ImageMapsList *mapList;
   Object *mapKey;
   bool isMap;
 
   bool markEmpty;
   bool useAltStyle;
   core::style::Style *altStyle;
   core::style::Style *savedStyle;
 
protected:
   void sizeRequestSimpl (core::Requisition *requisition);
   void getExtremesSimpl (core::Extremes *extremes);
   void sizeAllocateImpl (core::Allocation *allocation);
   void containerSizeChangedForChildren ();
   
   void draw (core::View *view, core::Rectangle *area,
              core::DrawingContext *context);
 
   bool buttonPressImpl (core::EventButton *event);
   bool buttonReleaseImpl (core::EventButton *event);
   void enterNotifyImpl (core::EventCrossing *event);
   void leaveNotifyImpl (core::EventCrossing *event);
   bool motionNotifyImpl (core::EventMotion *event);
   int contentX (core::MousePositionEvent *event);
   int contentY (core::MousePositionEvent *event);
 
   //core::Iterator *iterator (Content::Type mask, bool atEnd);
 
public:
   static int CLASS_ID;
 
   Image(const char *altText, bool markEmpty = false);
   ~Image();
 
   // For images, the minimal width is not well defined, and
   // correction of the size makes not much sense.
   virtual bool getAdjustMinWidth () { return false; }
 
   core::Iterator *iterator (core::Content::Type mask, bool atEnd);
 
   inline core::Imgbuf *getBuffer () { return buffer; }
   void setBuffer (core::Imgbuf *buffer, bool resize = false);
 
   void drawRow (int row);
 
   void finish ();
   void fatal ();
 
   void setIsMap ();
   void setUseMap (ImageMapsList *list, Object *key);
 
   /* This is a hack for the perhaps frivolous feature of drawing image map
    * shapes when there is no image to display. If the map is defined after
    * an image using an image map, and the actual image data has not been
    * loaded, tell the image to redraw.
    */
   void forceMapRedraw () { if (mapKey && ! buffer) queueDraw (); };
};
 
} // namespace dw
 
#endif // __DW_IMAGE_HH__