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https://issues.apache.org/jira/browse/FLEX-34649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14248384#comment-14248384
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Alex Harui commented on FLEX-34649:
-----------------------------------
The player does not correctly determine the atom boundaries when there are
discretionary hyphens in the text. So we've hacked this workaround and are
still finding bugs in our workaround. If you know your content won't use
discretionary hyphens you can set that flag and probably get better performance
and fewer bugs.
> Fatal errors in TextBlock after pasting text of specific length in TextArea
> ---------------------------------------------------------------------------
>
> Key: FLEX-34649
> URL: https://issues.apache.org/jira/browse/FLEX-34649
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: TextArea
> Affects Versions: Apache Flex 4.12.1
> Reporter: Mihai Chira
> Assignee: Mihai Chira
> Labels: easytest
> Fix For: Apache Flex 4.14.0
>
> Attachments: FLEX-34649.ZIP, bug.txt, noBug.txt
>
>
> h2. Scenario 1
> *Steps to reproduce*:
> # Compile and run the attached project
> # Click on the TextArea and press SPACE, then LEFT
> # Paste this text, _including the empty line at the end_: {noformat}This
> sentence needs to wrap with one or two characters lik: w
> {noformat}
> # Press DELETE
> *Desired behaviour*: the space is deleted without a fatal
> *Actual behaviour*: {noformat}TypeError: Error #1009: Cannot access a
> property or method of a null object reference.
> at
> flashx.textLayout.elements::ParagraphElement/findNextAtomBoundary()[C:\Users\evolverine\Adobe
> Flash Builder
> 4.7\FLEX-26478\src\flashx\textLayout\elements\ParagraphElement.as:576]
> at
> flashx.textLayout.utils::NavigationUtil$/nextAtomHelper()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/utils/NavigationUtil.as:93]
> at
> flashx.textLayout.utils::NavigationUtil$/doIncrement()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/utils/NavigationUtil.as:58]
> at
> flashx.textLayout.utils::NavigationUtil$/nextAtomPosition()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/utils/NavigationUtil.as:104]
> at
> flashx.textLayout.edit::EditManager/deleteNextCharacter()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/edit/EditManager.as:1273]
> at
> flashx.textLayout.edit::EditManager/keyDownHandler()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/edit/EditManager.as:371]
> at
> flashx.textLayout.container::ContainerController/keyDownHandler()[C:\Users\evolverine\Adobe
> Flash Builder
> 4.7\FLEX-26478\src\flashx\textLayout\container\ContainerController.as:2539]
> at
> flashx.textLayout.container::TextContainerManager/keyDownHandler()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/container/TextContainerManager.as:1889]
> at
> spark.components.supportClasses::RichEditableTextContainerManager/keyDownHandler()[/Users/aharui/release4.13.0/frameworks/projects/spark/src/spark/components/supportClasses/RichEditableTextContainerManager.as:665]
> {noformat}
> ----
> h2. Scenario 2
> *Steps to reproduce*:
> # Compile and run the attached project
> # Click on the TextArea
> # Paste this text: {noformat}:Boolean = tl.getAtomBidiLevel(currentAtomIndex)
> if{noformat}
> # Press LEFT / BACKSPACE
> *Desired behaviour*: the cursor moves left without an error / the last
> character ("f") is deleted without an error.
> *Actual behaviour*: {noformat}TypeError: Error #1009: Cannot access a
> property or method of a null object reference.
> at
> flashx.textLayout.elements::ParagraphElement/findPreviousAtomBoundary()[C:\Users\evolverine\Adobe
> Flash Builder
> 4.7\FLEX-26478\src\flashx\textLayout\elements\ParagraphElement.as:493]
> at
> flashx.textLayout.utils::NavigationUtil$/previousAtomHelper()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/utils/NavigationUtil.as:70]
> at
> flashx.textLayout.utils::NavigationUtil$/doIncrement()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/utils/NavigationUtil.as:58]
> at
> flashx.textLayout.utils::NavigationUtil$/previousAtomPosition()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/utils/NavigationUtil.as:81]
> at
> flashx.textLayout.utils::NavigationUtil$/moveBackwardHelper()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/utils/NavigationUtil.as:229]
> at
> flashx.textLayout.utils::NavigationUtil$/previousCharacter()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/utils/NavigationUtil.as:292]
> at
> flashx.textLayout.edit::SelectionManager/handleLeftArrow()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/edit/SelectionManager.as:1640]
> at
> flashx.textLayout.edit::SelectionManager/handleKeyEvent()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/edit/SelectionManager.as:1807]
> at
> flashx.textLayout.edit::SelectionManager/keyDownHandler()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/edit/SelectionManager.as:1870]
> at
> flashx.textLayout.edit::EditManager/keyDownHandler()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/edit/EditManager.as:291]
> at
> flashx.textLayout.container::ContainerController/keyDownHandler()[C:\Users\evolverine\Adobe
> Flash Builder
> 4.7\FLEX-26478\src\flashx\textLayout\container\ContainerController.as:2539]
> at
> flashx.textLayout.container::TextContainerManager/keyDownHandler()[/Users/aharui/git/flex/master/flex-tlf/textLayout/src/flashx/textLayout/container/TextContainerManager.as:1889]
> at
> spark.components.supportClasses::RichEditableTextContainerManager/keyDownHandler()[/Users/aharui/release4.13.0/frameworks/projects/spark/src/spark/components/supportClasses/RichEditableTextContainerManager.as:665]
> {noformat}
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