# HG changeset patch
# User Sebastian Geerken
# Date 1468749892 -7200
#      Sun Jul 17 12:04:52 2016 +0200
# Node ID 072f0c158c668b5ba5ed01b5f77ebb679ab3b6fe
# Parent  da460fb294e31d5c26a938b65a680af634360073
Reverse commit 4647:8c6b1b79d329.

diff --git a/dw/ooffloatsmgr.cc b/dw/ooffloatsmgr.cc
--- a/dw/ooffloatsmgr.cc
+++ b/dw/ooffloatsmgr.cc
@@ -338,8 +338,8 @@
    leftFloatsMark = rightFloatsMark = 0;
    lastLeftTBIndex = lastRightTBIndex = 0;
 
-   SizeChanged = true;
-   DBG_OBJ_SET_BOOL ("SizeChanged", SizeChanged);
+   floatRef = -1;
+   DBG_OBJ_SET_NUM ("floatRef", floatRef);
 
    containerAllocation = *(container->getAllocation());
 
@@ -630,51 +630,43 @@
    return vloat;
 }
 
-/*
- * Currently this is a compound recursion for textblocks:
- * markSizeChange -> updateReference -> queueResize -> markSizeChange
- * One way to see it is as a widget tree coverage problem. i.e. to cover all
- * the nodes that need a resize when a float changes its size.
- * The coverage logic of it is shared between resize code and mark code (here).
- * 
- * This implementation works for all the test cases so far. It relies on the
- * fact that Widget::queueResize should be called whenever a widget changes its
- * size. When "SizeChanged" is true, we notify the parent, when not, just the
- * following textblocks.
- */
 void OOFFloatsMgr::markSizeChange (int ref)
 {
    DBG_OBJ_ENTER ("resize.oofm", 0, "markSizeChange", "%d", ref);
 
-   // When "SizeChanged" is true, we know this float changed its size.
-   // This helps to prune redundant passes.
-   // "SizeChanged" is set by getSize(), which is called by sizeRequest().
-
-   SortedFloatsVector *list;
-   list = isSubRefLeftFloat(ref) ? leftFloats : rightFloats;
-   Float *vloat = list->get (getFloatIndexFromSubRef (ref));
+   // We implement "incremental resizing" (kind of), by remembering the largest
+   // value for "ref", in "floatRef". It is reset again in getSize(), which is
+   // called by sizeRequest().
+   if (floatRef == -1 || ref > floatRef) {
+      Float *vloat;
 
-   vloat->dirty = true;
-   DBG_OBJ_SET_BOOL_O (vloat->getWidget (), "<Float>.dirty", vloat->dirty);
-
-   assert (vloat->getWidget()->getWidgetReference() != NULL);
+      if (isSubRefLeftFloat (ref))
+         vloat = leftFloats->get (getFloatIndexFromSubRef (ref));
+      else if (isSubRefRightFloat (ref))
+         vloat = rightFloats->get (getFloatIndexFromSubRef (ref));
+      else {
+         assertNotReached();
+         vloat = NULL; // compiler happiness
+      }
 
-   int first = getOOFAwareWidget(vloat->generator)->index;
-   DBG_OBJ_MSGF ("resize.oofm", 1, "updating from %d", first);
+      vloat->dirty = true;  
+      DBG_OBJ_SET_BOOL_O (vloat->getWidget (), "<Float>.dirty", vloat->dirty);
 
-   //printf("IN markSizeChange %p ref %d SzCh=%d\n", this, ref,
-   //       (int)SizeChanged);
-
-   if (SizeChanged)
+      assert (vloat->getWidget()->getWidgetReference() != NULL);
+     
+      int first = getOOFAwareWidget(vloat->generator)->index;
+      DBG_OBJ_MSGF ("resize.oofm", 1, "updating from %d", first);
+      
       tbInfos->get(first)->getOOFAwareWidget()
          ->updateReference (vloat->getWidget()->getWidgetReference()
                             ->parentRef);
+      
+      for (int i = first + 1; i < tbInfos->size(); i++)
+         tbInfos->get(i)->getOOFAwareWidget()->updateReference(0);
 
-   for (int i = first + 1; i < tbInfos->size(); i++)
-      tbInfos->get(i)->getOOFAwareWidget()->updateReference(0);
-
-   SizeChanged = false; // Done.
-   DBG_OBJ_SET_BOOL ("SizeChanged", SizeChanged);
+      floatRef = ref;
+      DBG_OBJ_SET_NUM ("floatRef", floatRef);
+   }
    
    DBG_OBJ_LEAVE ();
 }
@@ -929,7 +921,7 @@
    *oofHeight =
       max (oofHeightLeft, oofHeightRight) + container->boxRestHeight ();
 
-   SizeChanged = true;
+   floatRef = -1;
    DBG_OBJ_SET_NUM ("floatRef", floatRef);
 
    DBG_OBJ_MSGF ("resize.oofm", 1,
diff --git a/dw/ooffloatsmgr.hh b/dw/ooffloatsmgr.hh
--- a/dw/ooffloatsmgr.hh
+++ b/dw/ooffloatsmgr.hh
@@ -165,7 +165,7 @@
                                      TBInfo> *tbInfosByOOFAwareWidget;
 
    int lastLeftTBIndex, lastRightTBIndex, leftFloatsMark, rightFloatsMark;
-   bool SizeChanged;
+   int floatRef;
 
    void moveExternalIndices (lout::container::typed::Vector<Float> *list,
                              int oldStartIndex, int diff);