<?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>190570</bug_id>
          
          <creation_ts>2018-10-14 20:52:12 -0700</creation_ts>
          <short_desc>Changing view scale should zoom to initial scale if the page is already at initial scale</short_desc>
          <delta_ts>2018-10-15 10:39:10 -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>WebKit Misc.</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Wenson Hsieh">wenson_hsieh</reporter>
          <assigned_to name="Wenson Hsieh">wenson_hsieh</assigned_to>
          <cc>bdakin</cc>
    
    <cc>commit-queue</cc>
    
    <cc>simon.fraser</cc>
    
    <cc>thorton</cc>
    
    <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1469112</commentid>
    <comment_count>0</comment_count>
    <who name="Wenson Hsieh">wenson_hsieh</who>
    <bug_when>2018-10-14 20:52:12 -0700</bug_when>
    <thetext>Changing zoom levels should zoom to initial scale if the page is already at initial scale</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1469113</commentid>
    <comment_count>1</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2018-10-14 20:52:49 -0700</bug_when>
    <thetext>&lt;rdar://problem/45261877&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1469219</commentid>
    <comment_count>2</comment_count>
      <attachid>352320</attachid>
    <who name="Wenson Hsieh">wenson_hsieh</who>
    <bug_when>2018-10-15 08:19:15 -0700</bug_when>
    <thetext>Created attachment 352320
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1469246</commentid>
    <comment_count>3</comment_count>
      <attachid>352325</attachid>
    <who name="Wenson Hsieh">wenson_hsieh</who>
    <bug_when>2018-10-15 08:39:29 -0700</bug_when>
    <thetext>Created attachment 352325
Add a layout test description</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1469277</commentid>
    <comment_count>4</comment_count>
      <attachid>352325</attachid>
    <who name="Tim Horton">thorton</who>
    <bug_when>2018-10-15 09:29:50 -0700</bug_when>
    <thetext>Comment on attachment 352325
Add a layout test description

View in context: https://bugs.webkit.org/attachment.cgi?id=352325&amp;action=review

&gt; Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm:2526
&gt; +    if (m_viewportConfiguration.layoutSizeScaleFactor() != scaleFactor &amp;&amp; std::abs(m_viewportConfiguration.initialScale() - pageScaleFactor()) &lt;= 0.025)

I think you might want areEssentiallyEqual for float compare. At least, Ben used it in a few places because we do so much math with these scales that they’d end up “equal” but only in that sense, and things would break. Don’t know if it’s a concern in this path.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1469289</commentid>
    <comment_count>5</comment_count>
      <attachid>352325</attachid>
    <who name="Wenson Hsieh">wenson_hsieh</who>
    <bug_when>2018-10-15 09:56:48 -0700</bug_when>
    <thetext>Comment on attachment 352325
Add a layout test description

View in context: https://bugs.webkit.org/attachment.cgi?id=352325&amp;action=review

&gt;&gt; Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm:2526
&gt;&gt; +    if (m_viewportConfiguration.layoutSizeScaleFactor() != scaleFactor &amp;&amp; std::abs(m_viewportConfiguration.initialScale() - pageScaleFactor()) &lt;= 0.025)
&gt; 
&gt; I think you might want areEssentiallyEqual for float compare. At least, Ben used it in a few places because we do so much math with these scales that they’d end up “equal” but only in that sense, and things would break. Don’t know if it’s a concern in this path.

I originally added this fudge factor so that if a user manually pinched to something close to initial scale, we&apos;d still zoom to the new initial scale upon zoom level change.

On second thought, I don&apos;t think this behavior is all that valuable — I changed this to just use areEssentiallyEqualAsFloat(), like all of the other page scale checks in this file.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1469290</commentid>
    <comment_count>6</comment_count>
      <attachid>352335</attachid>
    <who name="Wenson Hsieh">wenson_hsieh</who>
    <bug_when>2018-10-15 09:59:12 -0700</bug_when>
    <thetext>Created attachment 352335
Patch for landing</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1469312</commentid>
    <comment_count>7</comment_count>
      <attachid>352335</attachid>
    <who name="WebKit Commit Bot">commit-queue</who>
    <bug_when>2018-10-15 10:36:39 -0700</bug_when>
    <thetext>Comment on attachment 352335
Patch for landing

Clearing flags on attachment: 352335

Committed r237127: &lt;https://trac.webkit.org/changeset/237127&gt;</thetext>
  </long_desc>
      
          <attachment
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              isprivate="0"
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            <attachid>352320</attachid>
            <date>2018-10-15 08:19:15 -0700</date>
            <delta_ts>2018-10-15 08:39:28 -0700</delta_ts>
            <desc>Patch</desc>
            <filename>bug-190570-20181015081915.patch</filename>
            <type>text/plain</type>
            <size>13984</size>
            <attacher name="Wenson Hsieh">wenson_hsieh</attacher>
            
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          </attachment>
          <attachment
              isobsolete="0"
              ispatch="1"
              isprivate="0"
          >
            <attachid>352325</attachid>
            <date>2018-10-15 08:39:29 -0700</date>
            <delta_ts>2018-10-15 09:29:50 -0700</delta_ts>
            <desc>Add a layout test description</desc>
            <filename>bug-190570-20181015083929.patch</filename>
            <type>text/plain</type>
            <size>15296</size>
            <attacher name="Wenson Hsieh">wenson_hsieh</attacher>
            
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<flag name="review"
          id="369614"
          type_id="1"
          status="+"
          setter="thorton"
    />
          </attachment>
          <attachment
              isobsolete="0"
              ispatch="1"
              isprivate="0"
          >
            <attachid>352335</attachid>
            <date>2018-10-15 09:59:12 -0700</date>
            <delta_ts>2018-10-15 10:36:39 -0700</delta_ts>
            <desc>Patch for landing</desc>
            <filename>bug-190570-20181015095911.patch</filename>
            <type>text/plain</type>
            <size>16303</size>
            <attacher name="Wenson Hsieh">wenson_hsieh</attacher>
            
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</data>

          </attachment>
      

    </bug>

</bugzilla>