CodeFoldingModel (Oracle Fusion Middleware Java API Reference for Oracle Extension SDK)

All Known Implementing Classes:

DefaultCodeFoldingModel
```
public interface CodeFoldingModel<B>
```
The interface that defines the data model for a code editor that supports collapsible source code blocks.

Since:

10.1.3

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addCodeFoldingModelListener(CodeFoldingModelListener listener)` Adds a listener for changes to the data model.
`java.lang.String`	`getAbbreviatedText(B block)` Returns the abbreviated text to be used in place of the specified folding block when the block is collapsed.
`java.util.Iterator<B>`	`getChildren(B block)` Returns an `Iterator` over the children of the specified folding block.
`B[]`	`getCollapsedBlocks()` Returns the set of all collapsed blocks in the model; any collapsed block that also has a collapsed ancestor must be excluded from the return array.
`B`	`getFirstBlockAtLine(int line)` Returns the first collapsible source code block at the specified line.
`B`	`getParent(B block)` Returns the parent block for the specified folding block.
`B`	`getRoot()` Returns the root block in the data model.
`B`	`getSmallestEnclosingBlock(int offset)` Returns the smallest collapsible source code block that contains the specified character offset.
`int[]`	`getTextOffsets(B block, int[] offsets)` Stores the start and end character offsets of the specified block into the specified two-element integer array, and returns that array; if the specified array is `null`, a new array is allocated.
`java.lang.String`	`getToolTipText(B block)` Returns the tooltip text to display when the mouse is hovering over the specified source code block and the block is collapsed.
`boolean`	`isExpanded(B block)` Returns whether the specified folding block is expanded.
`void`	`readLock()` Acquires a read lock on the model.
`void`	`readUnlock()` Releases the previously acquired read lock on the model.
`void`	`removeCodeFoldingModelListener(CodeFoldingModelListener listener)` Removes a listener from the data model.
`void`	`setExpanded(B block, boolean isExpanded)` Sets whether the specified folding block should be expanded.

- Method Detail
  - readLock
```
void readLock()
```
    Acquires a read lock on the model. If the lock is not available, then the current thread blocks until the lock is acquired. A lock must be acquired before querying the model.
  - readUnlock
```
void readUnlock()
```
    Releases the previously acquired read lock on the model. The lock should always be released after the client has completed querying the model.
  - getRoot
```
B getRoot()
```
    Returns the root block in the data model. This is typically an uncollapsible dummy node representing the contents of the entire source document.
    The client must acquire a lock on the model before calling this method.
    
    Returns:
    the root block, or null if there is no root block in the model
  - getChildren
```
java.util.Iterator<B> getChildren(B block)
```
    Returns an Iterator over the children of the specified folding block. The return value may not be null; if the block contains no children, an empty Iterator should be returned.
    The client must acquire a lock on the model before calling this method.
    
    Parameters:
    block - the parent folding block from this data source
    
    Returns:
    an iterator over the children of the block; the return value must not be null.
  - getParent
```
B getParent(B block)
```
    Returns the parent block for the specified folding block.
    The client must acquire a lock on the model before calling this method.
    
    Parameters:
    block - the child folding block from this data source
    
    Returns:
    the parent block, or null if the specified block is the root
  - getSmallestEnclosingBlock
```
B getSmallestEnclosingBlock(int offset)
```
    Returns the smallest collapsible source code block that contains the specified character offset.
    The client must acquire a lock on the model before calling this method.
    
    Parameters:
    offset - the target character offset
    
    Returns:
    the smallest block containing the specified offset, or null if the model is empty or the offset is invalid
  - getFirstBlockAtLine
```
B getFirstBlockAtLine(int line)
```
    Returns the first collapsible source code block at the specified line.
    The client must acquire a lock on the model before calling this method.
    
    Parameters:
    line - the target line
    
    Returns:
    the first block at the specified line, or null if the model is empty or the offset is invalid
  - getCollapsedBlocks
```
B[] getCollapsedBlocks()
```
    Returns the set of all collapsed blocks in the model; any collapsed block that also has a collapsed ancestor must be excluded from the return array. If there are no collapsed blocks, an empty array should be returned.
    The client must acquire a lock on the model before calling this method.
    
    Returns:
    the array of collapsed blocks; the return value must not be null
  - getTextOffsets
```
int[] getTextOffsets(B block,
                   int[] offsets)
```
    Stores the start and end character offsets of the specified block into the specified two-element integer array, and returns that array; if the specified array is null, a new array is allocated.
    The client must acquire a lock on the model before calling this method.
    
    Parameters:
    block - a folding block from this data source
    offsets - a two-element integer array; if null, a new array is allocated
    
    Returns:
    a two-element integer array, where the first integer is the start offset of the block and the second integer is is the end offset.
  - getToolTipText
```
java.lang.String getToolTipText(B block)
```
    Returns the tooltip text to display when the mouse is hovering over the specified source code block and the block is collapsed. The text should correspond to text from the source document.
    The client must acquire a lock on the model before calling this method.
    
    Parameters:
    block - the target source code block
    
    Returns:
    the tooltip text to display
  - getAbbreviatedText
```
java.lang.String getAbbreviatedText(B block)
```
    Returns the abbreviated text to be used in place of the specified folding block when the block is collapsed. The length of the replacement text should be less than the length of uncollapsed text.
    The client must acquire a lock on the model before calling this method.
    
    Parameters:
    block - a folding block from this data source
    
    Returns:
    the abbreviated text used in place of the collapsed folding block
  - isExpanded
```
boolean isExpanded(B block)
```
    Returns whether the specified folding block is expanded.
    This method may be called without acquiring a lock on the model.
    
    Parameters:
    block - a folding block from this data source
    
    Returns:
    true if the folding block is expanded
  - setExpanded
```
void setExpanded(B block,
               boolean isExpanded)
```
    Sets whether the specified folding block should be expanded.
    This method may be called without acquiring a lock on the model.
    
    Parameters:
    block - a folding block from this data source
    isExpanded - true if the folding block should be expanded
  - addCodeFoldingModelListener
```
void addCodeFoldingModelListener(CodeFoldingModelListener listener)
```
    Adds a listener for changes to the data model.
    This method may be called without acquiring a lock on the model.
    
    Parameters:
    listener - the listener to add
  - removeCodeFoldingModelListener
```
void removeCodeFoldingModelListener(CodeFoldingModelListener listener)
```
    Removes a listener from the data model.
    This method may be called without acquiring a lock on the model.
    
    Parameters:
    listener - the listener to remove

Interface CodeFoldingModel<B>

Method Summary

Method Detail

readLock

readUnlock

getRoot

getChildren

getParent

getSmallestEnclosingBlock

getFirstBlockAtLine

getCollapsedBlocks

getTextOffsets

getToolTipText

getAbbreviatedText

isExpanded

setExpanded

addCodeFoldingModelListener

removeCodeFoldingModelListener