[FLEX-34649] Fatal errors in TextBlock after pasting text of specific length in TextArea

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Apache Flex 4.12.1
• Fix Version/s: Apache Flex 4.14.0
• Component/s: Spark: TextArea
• Labels: easytest
• Assignee: Mihai Chira
• Reporter: Mihai Chira
• Created: 27/Nov/14 16:44
• Updated: 16/Dec/14 17:28
• Resolved: 16/Dec/14 15:41

Description

Scenario 1

Steps to reproduce:

1. Compile and run the attached project
2. Click on the TextArea and press SPACE, then LEFT
3. Paste this text, including the empty line at the end:

   This sentence needs to wrap with one or two characters lik: w
   
   

4. Press DELETE

Desired behaviour: the space is deleted without a fatal
Actual behaviour:

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]

---

Scenario 2

Steps to reproduce:

1. Compile and run the attached project
2. Click on the TextArea
3. Paste this text:

   :Boolean = tl.getAtomBidiLevel(currentAtomIndex)
   if

4. Press LEFT / BACKSPACE

Desired behaviour: the cursor moves left without an error / the last character ("f") is deleted without an error.
Actual behaviour:

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]

Issue Links

• relates to: FLEX-26830 TextContainerManager crash when using keyboard arrows