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https://issues.apache.org/jira/browse/FLEX-33779?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Harui reassigned FLEX-33779:
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Assignee: Alex Harui
> RTE in Label.as when it's 8px wide and uses the Myriad Web Pro font face
> ------------------------------------------------------------------------
>
> Key: FLEX-33779
> URL: https://issues.apache.org/jira/browse/FLEX-33779
> Project: Apache Flex
> Issue Type: Bug
> Components: Embedded Fonts, Spark: Label
> Affects Versions: Apache Flex 4.10.0
> Environment: Windows 8
> SDK 4.10
> Reporter: Mihai Chira
> Assignee: Alex Harui
> Priority: Minor
> Labels: mandelbug
> Attachments: _LabelTruncationError.fxp
>
>
> Build and run the attached project. Hit Apply. You will get this error:
> RangeError: Error #1125: The index 2 is out of range 0.
> at
> spark.components::Label/getNextTruncationPosition()[C:\Users\Developer1\workspace\_LabelTruncationError\src\spark\components\Label.as:1587]
> at
> spark.components::Label/truncateText()[C:\Users\Developer1\workspace\_LabelTruncationError\src\spark\components\Label.as:1386]
> at
> spark.components::Label/http://www.adobe.com/2006/flex/mx/internal::composeTextLines()[C:\Users\Developer1\workspace\_LabelTruncationError\src\spark\components\Label.as:496]
> at
> spark.components.supportClasses::TextBase/updateDisplayList()[C:\Users\Developer1\workspace\_LabelTruncationError\src\spark\components\supportClasses\TextBase.as:705]
> at
> mx.core::UIComponent/validateDisplayList()[F:\hudson\hudson-slave\workspace\flex-sdk_release\frameworks\projects\framework\src\mx\core\UIComponent.as:9261]
> at
> mx.managers::LayoutManager/validateDisplayList()[F:\hudson\hudson-slave\workspace\flex-sdk_release\frameworks\projects\framework\src\mx\managers\LayoutManager.as:744]
> at
> mx.managers::LayoutManager/doPhasedInstantiation()[F:\hudson\hudson-slave\workspace\flex-sdk_release\frameworks\projects\framework\src\mx\managers\LayoutManager.as:827]
> at
> mx.managers::LayoutManager/doPhasedInstantiationCallback()[F:\hudson\hudson-slave\workspace\flex-sdk_release\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1188]
> The same thing happens eventually if you hit "Auto increment". This was
> created so that I could find the width at which other fonts would throw the
> same error.*
> * I didn't find any other. Myriad Web Pro seems to be unique somehow.
> Notes:
> 1. I couldn't find another value for the label's text property that could
> throw this error. "User Status" and some of its anagrams seem to be special
> (though not all! "Status User" won't throw the RTE).
> 2. I couldn't find another font with Kerning information (as Myriad Web Pro
> is) that could throw the error, despite incrementing the label's size once
> every three frames by .001 to make sure it wasn't about the size of the
> increment. I've included AppleGaramond.ttf as an example.
> 3. To expand on the above, if you go into the Type light font editing
> application, open MyriadWebPro.ttf, go to Font->Font Options..., deselect
> Kerning and save it (that's what I did for "MyriadWebProNoKerning.ttf" in the
> assets/fonts folder), you cannot get the same RTE even if you try to Auto
> increment. Kerning seems to be key. However, AppleGaramong.ttf, which already
> has kerning information, does not throw the RTE.
> 4. If maxDisplayedLines is not 2, there's no RTE for any increment.
> 5. If you set two breakpoints in TextBase.measure() and
> TextBase.updateDisplayList() (both of which call composeTextLines), you will
> see that composeTextLines() is first called from measure() (via
> LayoutManager.validateSize) and works just fine. It's the second call, the
> one through TextBase.updateDisplayList(), that ends up throwing the RTE.
> 6. If I use AppleGaramond and hit Apply for a width of 5px, on the second
> call to Label.composeTextLines() no textLines are created on this call var
> allLinesComposed:Boolean = createTextLines(elementFormat); From there on
> things proceed smoothly. I therefore conclude that textLines being created in
> this call for MyriadWebPro is buggy behaviour.
> 7. Continuing from the above, the problem seems to be in
> TextBlock.recreateTextLine, which in the happy path (see point 6 above)
> returns null, while in the buggy path it returns a valid TextLine object (see
> Label.createTextLinesFromTextBlock).
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