<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>43960</bug_id>
          
          <creation_ts>2010-08-13 02:28:29 -0700</creation_ts>
          <short_desc>[Chromium] styled scroll bar on the window is painted badly</short_desc>
          <delta_ts>2010-08-30 00:45:04 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>Layout and Rendering</component>
          <version>528+ (Nightly build)</version>
          <rep_platform>PC</rep_platform>
          <op_sys>OS X 10.5</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords></keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Hajime Morrita">morrita</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>dglazkov</cc>
    
    <cc>hyatt</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>264257</commentid>
    <comment_count>0</comment_count>
    <who name="Hajime Morrita">morrita</who>
    <bug_when>2010-08-13 02:28:29 -0700</bug_when>
    <thetext>Scrollbars for the outermost frme are painted badly  when it has incomplete CSS style.
Precicely, 
- if it has CSS style that doesn&apos;t have  background-* properties, then
- The scrollbars are NOT painted, that causes visual artifact (old paint result lasts there.)

Note that Safari doesn&apos;t suffer from this problem because it doesn&apos;t allow to customize the outermost scrollbars.

Originally from http://code.google.com/p/chromium/issues/detail?id=47946.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>264262</commentid>
    <comment_count>1</comment_count>
      <attachid>64317</attachid>
    <who name="Hajime Morrita">morrita</who>
    <bug_when>2010-08-13 02:54:12 -0700</bug_when>
    <thetext>Created attachment 64317
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>264406</commentid>
    <comment_count>2</comment_count>
      <attachid>64317</attachid>
    <who name="Dimitri Glazkov (Google)">dglazkov</who>
    <bug_when>2010-08-13 09:33:18 -0700</bug_when>
    <thetext>Comment on attachment 64317
Patch

I am not sure if this is a good patch (not yet that knowledgeable about the mechanics here :), but here are a few nits:

WebCore/ChangeLog:15
 +          (WebCore::RenderObject::hasBackground):
Please use this template to outline the changes you made. For instance: &quot;Moved most of this logic to blah&quot;.

WebCore/rendering/RenderScrollbar.cpp:144
 +  void RenderScrollbar::adjustStyle(RenderStyle* style) const
Why a separate method for this? It&apos;s only being used in one place and it&apos;s short enough to inline, I think?

WebCore/rendering/RenderScrollbar.cpp:149
 +      // causes visual artifact like non-repainted durty region.
&quot;painted&quot; and &quot;dirty&quot;.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>264932</commentid>
    <comment_count>3</comment_count>
      <attachid>64464</attachid>
    <who name="Hajime Morrita">morrita</who>
    <bug_when>2010-08-15 22:05:12 -0700</bug_when>
    <thetext>Created attachment 64464
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>264933</commentid>
    <comment_count>4</comment_count>
    <who name="Hajime Morrita">morrita</who>
    <bug_when>2010-08-15 22:06:41 -0700</bug_when>
    <thetext>Hi Dimitri, thank you for reviewing!
I updated the patch.

&gt; WebCore/ChangeLog:15
&gt;  +          (WebCore::RenderObject::hasBackground):
&gt; Please use this template to outline the changes you made. For instance: &quot;Moved most of this logic to blah&quot;.
OK, added some explanation. Thank you for pointing this out.

&gt; 
&gt; WebCore/rendering/RenderScrollbar.cpp:144
&gt;  +  void RenderScrollbar::adjustStyle(RenderStyle* style) const
&gt; Why a separate method for this? It&apos;s only being used in one place and it&apos;s short enough to inline, I think?
&gt; 
Agreed and inlined.

&gt; WebCore/rendering/RenderScrollbar.cpp:149
&gt;  +      // causes visual artifact like non-repainted durty region.
&gt; &quot;painted&quot; and &quot;dirty&quot;.
Oops. Fixed.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>269762</commentid>
    <comment_count>5</comment_count>
      <attachid>64464</attachid>
    <who name="Kent Tamura">tkent</who>
    <bug_when>2010-08-26 00:43:12 -0700</bug_when>
    <thetext>Comment on attachment 64464
Patch

The patch looks reasonable.  I&apos;ll set r+ tomorrow if no one objects.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>271337</commentid>
    <comment_count>6</comment_count>
    <who name="Hajime Morrita">morrita</who>
    <bug_when>2010-08-30 00:45:04 -0700</bug_when>
    <thetext>Committed r66372: &lt;http://trac.webkit.org/changeset/66372&gt;</thetext>
  </long_desc>
      
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            <date>2010-08-13 02:54:12 -0700</date>
            <delta_ts>2010-08-15 22:05:07 -0700</delta_ts>
            <desc>Patch</desc>
            <filename>bug-43960-20100813185410.patch</filename>
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          </attachment>
          <attachment
              isobsolete="0"
              ispatch="1"
              isprivate="0"
          >
            <attachid>64464</attachid>
            <date>2010-08-15 22:05:12 -0700</date>
            <delta_ts>2010-08-27 06:03:03 -0700</delta_ts>
            <desc>Patch</desc>
            <filename>bug-43960-20100816140510.patch</filename>
            <type>text/plain</type>
            <size>8716</size>
            <attacher name="Hajime Morrita">morrita</attacher>
            
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<flag name="review"
          id="53040"
          type_id="1"
          status="+"
          setter="tkent"
    />
          </attachment>
      

    </bug>

</bugzilla>