From 8f7482700184053df7afe30f822dd1714da365af Mon Sep 17 00:00:00 2001
From: lecoanet
Date: Thu, 23 Mar 2000 14:09:54 +0000
Subject: Remanniement des routines de transformation et de clip pour utiliser
 la fonctionalit� fournie par Item.c

---
 generic/Group.c | 171 ++++++++++----------------------------------------------
 1 file changed, 30 insertions(+), 141 deletions(-)

(limited to 'generic/Group.c')

diff --git a/generic/Group.c b/generic/Group.c
index 8d5523d..bc636be 100644
--- a/generic/Group.c
+++ b/generic/Group.c
@@ -161,7 +161,7 @@ Clone(Item	item)
    * the new items.
    */
   if (dependents) {
-    printf("rebuilding dependents\n");
+    /*printf("rebuilding dependents\n");*/
     group->dependents = NULL;
     items = (Item *) ZnListArray(dependents);
     num_items = ZnListSize(dependents);
@@ -180,9 +180,9 @@ Clone(Item	item)
 	abort();
       }
       else {
-	printf("item %d correspond to ", current_item->connected_item->id);
+	/*printf("item %d correspond to ", current_item->connected_item->id);*/
 	current_item->connected_item = (Item) Tcl_GetHashValue(entry);
-	printf("%d\n", current_item->connected_item->id); 
+	/*printf("%d\n", current_item->connected_item->id);*/
 	ITEM.InsertDependentItem(current_item);
       }
     }
@@ -402,89 +402,15 @@ PushClip(GroupItem	group,
 	 ZnBool		set_gc)
 {
   WidgetInfo	*wi = ((Item) group)->wi;
-  int		i, num_c, num_pts;
+  int		num_pts;
   ZnPoint	*pts;
-  ZnBool	simple, has_clip=False;
-  ClipState	*previous_clip=NULL;
-  Region	reg;
-  XRectangle	rect;
-  XPoint	*xpts;
+  ZnBool	simple;
 
   if ((group->clip != ZN_NO_ITEM) &&
       ((((Item) group) != wi->top_group) || !wi->reshape)) {
     simple = group->clip->class->GetClipVertices(group->clip, &pts, &num_pts);
-
-    if (num_pts != 0) {
-      has_clip = True;
-      
-      num_c = ZnListSize(wi->clip_stack);
-      if (num_c != 0) {
-	previous_clip = (ClipState *) ZnListAt(wi->clip_stack, ZnListTail);
-      }
-      ZnListAssertSize(wi->clip_stack, num_c+1);
-      wi->current_clip = (ClipState *) ZnListAt(wi->clip_stack, ZnListTail);
-      wi->current_clip->simple = simple;
-      
-      /*
-       * Compute the local region.
-       */
-      if (simple) {
-	rect.x = pts[0].x;
-	rect.y = pts[0].y;
-	rect.width = pts[1].x - pts[0].x;
-	rect.height = pts[1].y - pts[0].y;
-	reg = XCreateRegion();
-	XUnionRectWithRegion(&rect, reg, reg);
-	/*printf("Adding a simple clip: %d, %d, %d, %d\n",
-	  rect.x, rect.y, rect.width, rect.height);*/
-      }
-      else {
-	xpts = (XPoint *) ZnMalloc(num_pts * sizeof(XPoint));
-	for (i = 0; i < num_pts; i++) {
-	  xpts[i].x = pts[i].x;
-	  xpts[i].y = pts[i].y;
-	}
-	reg = XPolygonRegion(xpts, num_pts, EvenOddRule);
-	ZnFree(xpts);
-      }
-      /*
-       * Combine with previous region if any.
-       */
-      if (previous_clip) {
-	wi->current_clip->region = XCreateRegion();
-	XIntersectRegion(reg, previous_clip->region, wi->current_clip->region);
-	XDestroyRegion(reg);
-	/*printf("Merging with previous clip\n");*/
-      }
-      else {
-	wi->current_clip->region = reg;
-      }
-      XClipBox(wi->current_clip->region, &rect);
-      wi->current_clip->clip_box.orig.x = rect.x;
-      wi->current_clip->clip_box.orig.y = rect.y;
-      wi->current_clip->clip_box.corner.x = rect.x + rect.width;
-      wi->current_clip->clip_box.corner.y = rect.y + rect.height;
-      /*printf("Clip box is : %d, %d, %d, %d\n",
-	rect.x, rect.y, rect.width, rect.height);*/
-    }
-  }
-  /*
-   * Set the clipping in the GC, and substitute the combined
-   * clip region/damaged region for the clip region. 
-   */
-  if (set_gc) {
-    if ((((Item) group) == wi->top_group) || has_clip) {
-      if (wi->current_clip) {
-	reg = XCreateRegion();
-	XIntersectRegion(wi->current_clip->region, wi->damaged_region, reg);
-	XDestroyRegion(wi->current_clip->region);
-	wi->current_clip->region = reg;
-	XSetRegion(wi->dpy, wi->gc, wi->current_clip->region);
-      }
-      else {
-	XSetRegion(wi->dpy, wi->gc, wi->damaged_region);
-      }
-    }
+    /*printf("Group: PushClip group %d\n", ((Item) group)->id);*/
+    ITEM_P.PushClip(wi, pts, num_pts, simple, set_gc);
   }
 }
 
@@ -505,31 +431,8 @@ PopClip(GroupItem	group,
 
   if ((group->clip != ZN_NO_ITEM) &&
       ((((Item) group) != wi->top_group) || !wi->reshape)) {
-    XDestroyRegion(wi->current_clip->region);
-    ZnListDelete(wi->clip_stack, ZnListTail);
-    if (ZnListSize(wi->clip_stack) != 0) {
-      wi->current_clip = (ClipState *) ZnListAt(wi->clip_stack, ZnListTail);
-    }
-    else {
-      wi->current_clip = NULL;
-    }
-  }
-  
-  /*
-   * Set the clipping in the GC.
-   */
-  if (set_gc) {
-    if (wi->current_clip) {
-      XSetRegion(wi->dpy, wi->gc, wi->current_clip->region);
-    }
-    else if (((Item) group) == wi->top_group) {
-      /*printf("resetting clip mask\n");*/
-      XSetClipMask(wi->dpy, wi->gc, None);
-    }
-    else {
-      /*printf("resetting to damaged area\n");*/
-      XSetRegion(wi->dpy, wi->gc, wi->damaged_region);
-    }
+    /*printf("Group: PopClip group %d\n", ((Item) group)->id);*/
+    ITEM_P.PopClip(wi, set_gc);
   }
 }
 
@@ -546,26 +449,15 @@ PopClip(GroupItem	group,
 static void
 PushTransform(Item	item)
 {
-  WidgetInfo	*wi;
-  ZnTransfo	*next_t;
-  int		num_t;
-  
   if (!item->transfo &&
       ISSET(item->flags, COMPOSE_SCALE_BIT) &&
       ISSET(item->flags, COMPOSE_ROTATION_BIT)) {
     return;
   }
-  /*
-   * Push the current transform and concatenate
-   * the item transform taking into account the
-   * combination flags.
-   */
-  wi = item->wi;
-  num_t = ZnListSize(wi->transfo_stack);
-  ZnListAssertSize(wi->transfo_stack, num_t+1);
-  next_t = (ZnTransfo *) ZnListAt(wi->transfo_stack, num_t);
-  ITEM.ComposeItemTransform(item, wi->current_transfo, next_t);
-  wi->current_transfo = next_t;
+
+  ITEM_P.PushTransform(item->wi, item->transfo,
+		       ISSET(item->flags, COMPOSE_SCALE_BIT),
+		       ISSET(item->flags, COMPOSE_ROTATION_BIT));
   /*printf("Pushing transfo for item: %d\n;", item->id);
     ZnPrintTransfo(wi->current_transfo);*/
 }
@@ -582,20 +474,13 @@ PushTransform(Item	item)
 static void
 PopTransform(Item	item)
 {
-  WidgetInfo	*wi;
-
   if (!item->transfo &&
       ISSET(item->flags, COMPOSE_SCALE_BIT) &&
       ISSET(item->flags, COMPOSE_ROTATION_BIT)) {
     return;
   }
-  
-  /*
-   * Restore the previous transform.
-   */
-  wi = item->wi;
-  ZnListDelete(wi->transfo_stack, ZnListTail);
-  wi->current_transfo = (ZnTransfo *) ZnListAt(wi->transfo_stack, ZnListTail);
+
+  ITEM_P.PopTransform(item->wi);
   /*printf("Popping transfo for item: %d\n", item->id);
   ZnPrintTransfo(wi->current_transfo);*/
 }
@@ -617,6 +502,7 @@ static void
 CallRegularCC(Item	item)
 {
   WidgetInfo	*wi = item->wi;
+  ZnBBox	*clip_box;
   
   /*
    * Do some generic pre-work in behalf of the (regular) children.
@@ -631,12 +517,15 @@ CallRegularCC(Item	item)
   item->class->ComputeCoordinates(item, False);
   /*
    * If a current clipbox exists adjust the item
-   * bounding box accordingly.
+   * bounding box accordingly. When computing coordinates
+   * the damaged area is not pushed onto the clipstack,
+   * the following predicate is thus valid for testing
+   * a clipbox. 
    */
-  if (wi->current_clip) {
+  if (ITEM_P.CurrentClip(wi, NULL, &clip_box, NULL)) {
     ZnBBox inter;
     
-    IntersectBBox(&item->item_bounding_box, &wi->current_clip->clip_box, &inter);
+    IntersectBBox(&item->item_bounding_box, clip_box, &inter);
     item->item_bounding_box = inter;
   }
   /*
@@ -882,14 +771,14 @@ Draw(Item 	item)
   GroupItem	group = (GroupItem) item;
   WidgetInfo	*wi = item->wi;
   Item		current_item;
-  ZnBBox	bbox;
-  ZnBBox	old_damaged_area;
+  ZnBBox	bbox, old_damaged_area, *clip_box;
   
   PushTransform(item);
   PushClip(group, True);
-  if ((group->clip != ZN_NO_ITEM) && wi->current_clip) {
+  if (group->clip != ZN_NO_ITEM) {
+    ITEM_P.CurrentClip(wi, NULL, &clip_box, NULL);
     old_damaged_area = wi->damaged_area;
-    IntersectBBox(&wi->damaged_area, &wi->current_clip->clip_box, &bbox);
+    IntersectBBox(&wi->damaged_area, clip_box, &bbox);
     wi->damaged_area = bbox;
   }
   
@@ -926,7 +815,7 @@ Draw(Item 	item)
     current_item = current_item->previous;
   }
 
-  if ((group->clip != ZN_NO_ITEM) && wi->current_clip) {
+  if (group->clip != ZN_NO_ITEM) {
     wi->damaged_area = old_damaged_area;
   }
   PopClip(group, True);
@@ -990,7 +879,7 @@ Pick(Item	item,
   WidgetInfo	*wi = item->wi;
   int		p_part;
   double	dist, best = 1e10;
-  ZnBBox	bbox, inter;
+  ZnBBox	bbox, inter, *clip_box;
   ZnBool	in_depth;
   
   *a_item= ZN_NO_ITEM;
@@ -1008,8 +897,8 @@ Pick(Item	item,
   bbox.corner.x = p->x + (aperture?aperture:1);
   bbox.corner.y = p->y + (aperture?aperture:1);
 
-  if (wi->current_clip) {
-    IntersectBBox(&bbox, &wi->current_clip->clip_box, &inter);
+  if (ITEM_P.CurrentClip(wi, NULL, &clip_box, NULL)) {
+    IntersectBBox(&bbox, clip_box, &inter);
     if (IsEmptyBBox(&inter)) {
       goto out;
     }
-- 
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