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Specs: the paint model where each node is responsible for its children

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(I'm just updating this here so that I can revert to it if we decide
the hybrid model isn't better after all)

Review URL: https://codereview.chromium.org/743873003
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Hixie 2014-11-20 15:03:15 -08:00
parent e16b5b6655
commit bf85d3516b
1 changed files with 10 additions and 8 deletions
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18
specs/style.md
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@ -518,6 +518,7 @@ class LayoutManager {
// call markAsLaidOut();
// if width is null, set width to getIntrinsicWidth().value
// if height is null, set width height getIntrinsicHeight().value
// call this.assumeDimensions(width, height);
// call this.layoutChildren(width, height);
// return { width: width, height: height }
// - this should always call this.markAsLaidOut() to reset needsLayout
@ -532,8 +533,8 @@ class LayoutManager {
void markAsPainted(); // sets this.node.needsPaint and this.node.descendantNeedsPaint to false
virtual void paint(RenderingSurface canvas);
// set a clip rect on the canvas for rect(0,0,this.width,this.height)
// if needsPaint is true:
// if needsPaint:
// set a clip rect on the canvas for rect(0,0,this.width,this.height)
// call the painter of each property, in order they were registered, which on this element has a painter
// call this.paintChildren(canvas)
// (the default implementation doesn't paint anything on top of the children)
@ -541,17 +542,18 @@ class LayoutManager {
// call markAsPainted()
virtual void paintChildren(RenderingSurface canvas);
// if descendantNeedsPaint is true:
// if this.needsPaint or this.descendantNeedsPaint:
// for each child returned by walkChildren():
// if child.needsPaint or child.descendantNeedsPaint:
// call this.paintChild(canvas, child)
// call this.paintChild(canvas, child)
// - you should skip children that will be clipped out of yourself because they're outside your bounds
virtual void paintChild(RenderingSurface canvas, LayoutManager child);
// insert a "paint this child" instruction in our canvas instruction list (we should probably make sure we expose that API directly, too)
// start a new canvas for the child:
// if this.needsPaint():
// insert a "paint this child" instruction in our canvas instruction list (we should probably make sure we expose that API directly, too)
// if child.needsPaint or child.descendantNeedsPaint:
// start a new canvas for the child:
// transform the coordinate space by translate(child.x, child.y)
// call child.paint(canvas)
// call child.paint(canvas)
virtual Node hitTest(Float x, Float y);
// default implementation uses the node's children nodes' x, y,