1 files changed, 392 insertions, 0 deletions

diff --git a/dw/image.cc b/dw/image.cc
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index 00000000..499fc438
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+++ b/dw/image.cc
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+/*
+ * Dillo Widget
+ *
+ * Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+
+#include "image.hh"
+#include "../lout/misc.hh"
+
+namespace dw {
+
+using namespace lout;
+
+ImageMapsList::ImageMap::ImageMap ()
+{
+   shapesAndLinks = new container::typed::List <ShapeAndLink> (true);
+   defaultLink = -1;
+}
+
+ImageMapsList::ImageMap::~ImageMap ()
+{
+   delete shapesAndLinks;
+}
+
+void ImageMapsList::ImageMap::add (core::Shape *shape, int link) {
+   ShapeAndLink *shapeAndLink = new ShapeAndLink ();
+   shapeAndLink->shape = shape;
+   shapeAndLink->link = link;
+   shapesAndLinks->append (shapeAndLink);
+}
+
+int ImageMapsList::ImageMap::link (int x, int y) {
+   container::typed::Iterator <ShapeAndLink> it;
+   int link = defaultLink;
+
+   for (it = shapesAndLinks->iterator (); it.hasNext (); ) {
+      ShapeAndLink *shapeAndLink = it.getNext ();
+
+      if (shapeAndLink->shape->isPointWithin (x, y)) {
+         link = shapeAndLink->link;
+         break;
+      }
+   }
+
+   return link;
+}
+
+ImageMapsList::ImageMapsList ()
+{
+   imageMaps = new container::typed::HashTable <object::Object, ImageMap>
+      (true, true);
+   currentMap = NULL;
+}
+
+ImageMapsList::~ImageMapsList ()
+{
+   delete imageMaps;
+}
+
+/**
+ * \brief Start a new map and make it the current one.
+ *
+ * This has to be called before dw::ImageMapsList::addShapeToCurrentMap.
+ * "key" is owned by the image map list, so a copy should be passed, when
+ * necessary.
+ */
+void ImageMapsList::startNewMap (object::Object *key)
+{
+   currentMap = new ImageMap ();
+   imageMaps->put (key, currentMap);
+}
+
+/**
+ * \brief Add a shape to the current map-
+ *
+ * "shape" is owned by the image map list, so a copy should be passed, when
+ * necessary.
+ */
+void ImageMapsList::addShapeToCurrentMap (core::Shape *shape, int link)
+{
+   currentMap->add (shape, link);
+}
+
+/**
+ * \brief Set default link for current map-
+ */
+void ImageMapsList::setCurrentMapDefaultLink (int link)
+{
+   currentMap->setDefaultLink (link);
+}
+
+int ImageMapsList::link (object::Object *key, int x, int y)
+{
+   int link = -1;
+   ImageMap *map = imageMaps->get (key);
+
+   if (map)
+      link = map->link (x, y);
+
+   return link;
+}
+
+// ----------------------------------------------------------------------
+
+int Image::CLASS_ID = -1;
+
+Image::Image(const char *altText)
+{
+   registerName ("dw::Image", &CLASS_ID);
+   this->altText = altText ? strdup (altText) : NULL;
+   altTextWidth = -1; // not yet calculated
+   buffer = NULL;
+   clicking = false;
+   currLink = -1;
+   mapList = NULL;
+   mapKey = NULL;
+   isMap = false;
+}
+
+Image::~Image()
+{
+   if (altText)
+      delete altText;
+   if (buffer)
+      buffer->unref ();
+}
+
+void Image::sizeRequestImpl (core::Requisition *requisition)
+{
+   if (buffer) {
+      requisition->width = buffer->getRootWidth ();
+      requisition->ascent = buffer->getRootHeight ();
+      requisition->descent = 0;
+   } else {
+      if(altText && altText[0]) {
+         if (altTextWidth == -1)
+            altTextWidth =
+               layout->textWidth (getStyle()->font, altText, strlen (altText));
+
+         requisition->width = altTextWidth;
+         requisition->ascent = getStyle()->font->ascent;
+         requisition->descent = getStyle()->font->descent;
+      } else {
+         requisition->width = 0;
+         requisition->ascent = 0;
+         requisition->descent = 0;
+      }
+   }
+
+   requisition->width += getStyle()->boxDiffWidth ();
+   requisition->ascent += getStyle()->boxOffsetY ();
+   requisition->descent += getStyle()->boxRestHeight ();
+}
+
+void Image::sizeAllocateImpl (core::Allocation *allocation)
+{
+   core::Imgbuf *oldBuffer;
+   int dx, dy;
+
+   /* if image is moved only */
+   if (allocation->width == this->allocation.width &&
+       allocation->ascent + allocation->descent == getHeight ())
+      return;
+
+   dx = getStyle()->boxDiffWidth ();
+   dy = getStyle()->boxDiffHeight ();
+#if 0
+   printf("boxDiffHeight = %d + %d, buffer=%p\n",
+          getStyle()->boxOffsetY(), getStyle()->boxRestHeight(), buffer);
+   printf("getContentWidth() = allocation.width - style->boxDiffWidth ()"
+          " = %d - %d = %d\n",
+          this->allocation.width, getStyle()->boxDiffWidth(),
+          this->allocation.width - getStyle()->boxDiffWidth());
+   printf("getContentHeight() = getHeight() - style->boxDiffHeight ()"
+          " = %d - %d = %d\n", this->getHeight(), getStyle()->boxDiffHeight(),
+          this->getHeight() - getStyle()->boxDiffHeight());
+#endif
+   if (buffer != NULL &&
+       /* It may be, that the image is allocated at zero content size. In this
+        * case, we simply wait. */
+       getContentWidth () > 0 && getContentHeight () > 0) {
+      oldBuffer = buffer;
+      buffer = oldBuffer->getScaledBuf (allocation->width - dx,
+                                        allocation->ascent
+                                        + allocation->descent - dy);
+      oldBuffer->unref ();
+   }
+}
+
+void Image::enterNotifyImpl (core::EventCrossing *event)
+{
+   // BUG: this is wrong for image maps, but the cursor position is unknown.
+   currLink = getStyle()->x_link;
+
+   if (currLink != -1) {
+      (void) emitLinkEnter (currLink, -1, -1, -1);
+   }
+}
+
+void Image::leaveNotifyImpl (core::EventCrossing *event)
+{                                                          
+   clicking = false;
+
+   if (currLink != -1) {
+      currLink = -1;
+      (void) emitLinkEnter (-1, -1, -1, -1);
+   }
+}
+
+bool Image::motionNotifyImpl (core::EventMotion *event)
+{
+   if (mapList) {
+      /* client-side image map */
+      int newLink = mapList->link (mapKey, event->xWidget, event->yWidget);
+      if (newLink != currLink) {
+         currLink = newLink;
+         clicking = false;
+         setCursor(newLink == -1 ? core::style::CURSOR_DEFAULT :
+                                   core::style::CURSOR_POINTER);
+         (void) emitLinkEnter (newLink, -1, -1, -1);
+      }
+   } else if (isMap && currLink != -1) {
+      /* server-side image map */
+      (void) emitLinkEnter (currLink, -1, event->xWidget, event->yWidget);
+   }
+   return true;
+}
+
+bool Image::buttonPressImpl (core::EventButton *event)
+{
+   bool ret = false;
+   currLink = mapList ? mapList->link (mapKey, event->xWidget, event->yWidget):
+      getStyle()->x_link;
+   if (event->button == 3){
+      (void)emitLinkPress(currLink, getStyle()->x_img, -1,-1,event);
+      ret = true;
+   } else if (event->button == 1 || currLink != -1){
+      clicking = true;
+      ret = true;
+   }
+   return ret;
+}              
+
+bool Image::buttonReleaseImpl (core::EventButton *event)
+{
+   currLink = mapList ? mapList->link (mapKey, event->xWidget, event->yWidget):
+      getStyle()->x_link;
+   if (clicking) {
+      int x = isMap ? event->xWidget : -1;
+      int y = isMap ? event->yWidget : -1;
+      clicking = false;
+      emitLinkClick (currLink, getStyle()->x_img, x, y, event);
+      return true;
+   }
+   return false;
+}
+
+void Image::draw (core::View *view, core::Rectangle *area)
+{
+   int dx, dy;
+   core::Rectangle content, intersection;
+
+   drawWidgetBox (view, area, false);
+
+   if (buffer) {
+      dx = getStyle()->boxOffsetX ();
+      dy = getStyle()->boxOffsetY ();
+      content.x = dx;
+      content.y = dy;
+      content.width = getContentWidth ();
+      content.height = getContentHeight ();
+
+      if (area->intersectsWith (&content, &intersection))
+         view->drawImage (buffer,
+                          allocation.x + dx, allocation.y + dy,
+                          intersection.x - dx, intersection.y - dy,
+                          intersection.width, intersection.height);
+   } else {
+      if(altText && altText[0]) {
+         if (altTextWidth == -1)
+            altTextWidth =
+               layout->textWidth (getStyle()->font, altText, strlen (altText));
+         
+         core::View *clippingView = NULL, *usedView = view;
+         if (allocation.width < altTextWidth ||
+             allocation.ascent < getStyle()->font->ascent ||
+             allocation.descent < getStyle()->font->descent) {
+            clippingView = usedView =
+               view->getClippingView (allocation.x + getStyle()->boxOffsetX (),
+                                      allocation.y + getStyle()->boxOffsetY (),
+                                      allocation.width
+                                      - getStyle()->boxDiffWidth (),
+                                      allocation.ascent + allocation.descent
+                                      - getStyle()->boxDiffHeight ());
+         }
+
+         usedView->drawText (getStyle()->font, getStyle()->color,
+                             core::style::Color::SHADING_NORMAL,
+                             allocation.x + getStyle()->boxOffsetX (),
+                             allocation.y + getStyle()->boxOffsetY ()
+                             + getStyle()->font->ascent,
+                             altText, strlen(altText));
+
+         if(clippingView)
+            view->mergeClippingView (clippingView);
+      }
+   }
+
+   /** todo: draw selection */
+}
+
+core::Iterator *Image::iterator (core::Content::Type mask, bool atEnd)
+{
+   //return new core::TextIterator (this, mask, atEnd, altText);
+   /** \bug Not implemented. */
+   return new core::EmptyIterator (this, mask, atEnd);
+}
+
+void Image::setBuffer (core::Imgbuf *buffer, bool resize)
+{
+   core::Imgbuf *oldBuf = this->buffer;
+
+   if (resize)
+      queueResize (0, true);
+
+   // If the image has not yet been allocated, or is allocated at zero
+   // content size, the first part is useless.
+   if (wasAllocated () && getContentWidth () > 0 && getContentHeight () > 0) {
+         this->buffer =
+            buffer->getScaledBuf (getContentWidth (), getContentHeight ());
+   } else {
+      this->buffer = buffer;
+      buffer->ref ();
+   }
+
+   if (oldBuf)
+      oldBuf->unref ();
+}
+
+void Image::drawRow (int row)
+{
+   core::Rectangle area;
+
+   assert (buffer != NULL);
+   
+   buffer->getRowArea (row, &area);
+   if (area.width && area.height)
+      queueDrawArea (area.x + getStyle()->boxOffsetX (),
+                     area.y + getStyle()->boxOffsetY (),
+                     area.width, area.height);
+}
+
+
+/**
+ * \brief Sets image as server side image map.
+ */
+void Image::setIsMap ()
+{
+   isMap = true;
+}
+
+
+/**
+ * \brief Sets image as client side image map.
+ *
+ * "list" is not owned by the image, the caller has to free it. "key"
+ * is owned by the image, if it is used by the caller afterwards, a copy
+ * should be passed.
+ */
+void Image::setUseMap (ImageMapsList *list, object::Object *key)
+{
+   mapList = list;
+   mapKey = key;
+}
+
+} // namespace dw