#include <smartrange.h>

Inheritance diagram for KTextEditor::SmartRange:

Public Types
enum	InsertBehavior { DoNotExpand = 0, ExpandLeft = 0x1, ExpandRight = 0x2 }

Public Member Functions
virtual	~SmartRange ()

virtual bool	isSmartRange () const

SmartRange &	operator= (const SmartRange &rhs)

SmartRange &	operator= (const Range &rhs)

virtual SmartRange *	toSmartRange () const

Position
The following functions provide access and manipulation of the range's position.
virtual void	setRange (const Range &range)

SmartCursor &	smartStart ()

const SmartCursor &	smartStart () const

SmartCursor &	smartEnd ()

const SmartCursor &	smartEnd () const

virtual bool	confineToRange (const Range &range)

virtual bool	expandToRange (const Range &range)

Document-related functions
The following functions are provided for convenient access to the associated Document.
Document *	document () const

virtual QStringList	text (bool block=false) const

virtual bool	replaceText (const QStringList &text, bool block=false)

virtual bool	removeText (bool block=false)

Behavior
The following functions relate to the behavior of this SmartRange.
InsertBehaviors	insertBehavior () const

void	setInsertBehavior (InsertBehaviors behavior)

Tree structure
The following functions relate to the tree structure functionality.
SmartRange *	parentRange () const

virtual void	setParentRange (SmartRange *r)

bool	hasParent (SmartRange *parent) const

int	depth () const

SmartRange *	topParentRange () const

const QList< SmartRange * > &	childRanges () const

void	clearChildRanges ()

void	deleteChildRanges ()

void	clearAndDeleteChildRanges ()

SmartRange *	childBefore (const SmartRange *range) const

SmartRange *	childAfter (const SmartRange *range) const

SmartRange *	mostSpecificRange (const Range &input) const

SmartRange *	firstRangeContaining (const Cursor &pos) const

SmartRange *	deepestRangeContaining (const Cursor &pos, QStack< SmartRange * > rangesEntered=0L, QStack< SmartRange > *rangesExited=0L) const

QList< SmartRange * >	deepestRangesContaining (const Cursor &pos) const

int	overlapCount () const

Arbitrary highlighting
The following functions relate to arbitrary highlighting capabilities.
Attribute::Ptr	attribute () const

void	setAttribute (Attribute::Ptr attribute)

Action binding
The following functions relate to action binding capabilities. Note This feature is currently not implemented (ETA KDE 4.1).
void	associateAction (KAction *action)

void	dissociateAction (KAction *action)

const QList< KAction * > &	associatedActions () const

void	clearAssociatedActions ()

Notification
The following functions allow for changes related to this range to be notified to 3rd party programs.
SmartRangeNotifier *	primaryNotifier ()

const QList< SmartRangeNotifier * >	notifiers () const

void	addNotifier (SmartRangeNotifier *notifier)

void	removeNotifier (SmartRangeNotifier *notifier)

void	deletePrimaryNotifier ()

const QList< SmartRangeWatcher * > &	watchers () const

void	addWatcher (SmartRangeWatcher *watcher)

void	removeWatcher (SmartRangeWatcher *watcher)

Public Member Functions inherited from KTextEditor::Range
	Range ()

	Range (const Cursor &start, const Cursor &end)

	Range (const Cursor &start, int width)

	Range (const Cursor &start, int endLine, int endColumn)

	Range (int startLine, int startColumn, int endLine, int endColumn)

	Range (const Range &copy)

virtual	~Range ()

Range	encompass (const Range &range) const

Range	intersect (const Range &range) const

virtual bool	isValid () const

Range &	operator= (const Range &rhs)

Cursor &	start ()

const Cursor &	start () const

Cursor &	end ()

const Cursor &	end () const

void	setBothLines (int line)

void	setBothColumns (int column)

void	setRange (const Cursor &start, const Cursor &end)

bool	onSingleLine () const

int	numberOfLines () const

int	columnWidth () const

bool	isEmpty () const

bool	contains (const Range &range) const

bool	contains (const Cursor &cursor) const

bool	containsLine (int line) const

bool	containsColumn (int column) const

bool	overlaps (const Range &range) const

bool	overlapsLine (int line) const

bool	overlapsColumn (int column) const

int	positionRelativeToCursor (const Cursor &cursor) const

int	positionRelativeToLine (int line) const

bool	boundaryAtCursor (const Cursor &cursor) const

bool	boundaryOnLine (int line) const

bool	boundaryOnColumn (int column) const

Protected Member Functions
	SmartRange (SmartCursor start, SmartCursor end, SmartRange *parent=0L, InsertBehaviors insertBehavior=DoNotExpand)

virtual void	checkFeedback ()

virtual SmartRangeNotifier *	createNotifier ()=0

virtual void	rangeChanged (Cursor *cursor, const Range &from)

void	rebuildChildStructure ()

Protected Member Functions inherited from KTextEditor::Range
	Range (Cursor start, Cursor end)

Additional Inherited Members
Static Public Member Functions inherited from KTextEditor::Range
static Range	invalid ()

Protected Attributes inherited from KTextEditor::Range
Cursor *	m_end

Cursor *	m_start

Detailed Description

A Range which is bound to a specific Document, and maintains its position.

A SmartRange is an extension of the basic Range class. It maintains its position in the document and provides extra functionality, including:

convenience functions for accessing and manipulating the content of the associated document,
adjusting behavior in response to text edits,
forming a tree structure out of multiple SmartRanges,
providing attribute information for the arbitrary highlighting extension,
allowing KActions to be bound to the range (note: not currently implemented), and
providing notification of changes to 3rd party software.

As a result of a smart range's close association with a document, and the processing that occurrs as a result, smart ranges may not be copied.

For simplicity of code, ranges always maintain their start position to be before or equal to their end position. Attempting to set either the start or end of the range beyond the respective end or start will result in both values being set to the specified position.

Hierarchical range-trees maintain specific relationships:

When a child-range is changed, all parent-ranges are resized so the child-range fits in
When a parent-range is changed, all child-ranges are resized so they fit in

This means that parent-ranges always completely contain all their child-ranges. However it may lead to unexpected range-changes from the perspective of your application, so keep this in mind.

The child-ranges of one smart-range are allowed to overlap each other. However overlaps should be omitted where possible, for performance-reasons, and because each range can be overlapped by max. 63 sibling-ranges while still rendering correctly.

Create a new SmartRange like this:

// Retrieve the SmartInterface
KTextEditor::SmartInterface* smart =
    qobject_cast<KTextEditor::SmartInterface*>( yourDocument );
if ( smart ) {
    KTextEditor::SmartRange* range = smart->newSmartRange();
}

When finished with a SmartRange, simply delete it.

See also: Range, SmartRangeNotifier, SmartRangeWatcher, and SmartInterface

Author: Hamish Rodda <rodda.nosp@m.@kde.nosp@m..org>

Definition at line 94 of file smartrange.h.

Member Enumeration Documentation

enum KTextEditor::SmartRange::InsertBehavior

Determine how the range reacts to characters inserted immediately outside the range.

Enumerator
DoNotExpand	Don't expand to encapsulate new characters in either direction. This is the default.
ExpandLeft	Expand to encapsulate new characters to the left of the range.
ExpandRight	Expand to encapsulate new characters to the right of the range.

Definition at line 100 of file smartrange.h.

Constructor & Destructor Documentation

SmartRange::~SmartRange ( )

virtual

Definition at line 194 of file smartrange.cpp.

SmartRange::SmartRange	(	SmartCursor *	start,
		SmartCursor *	end,
		SmartRange *	parent = `0L`,
		InsertBehaviors	insertBehavior = `DoNotExpand`
	)

protected

Constructor for subclasses to utilise.

Protected to prevent direct instantiation.

Note: 3rd party developers: you do not (and should not) need to subclass the Smart* classes; instead, use the SmartInterface to create instances.

Parameters

start	the start cursor to use - ownership is taken
end	the end cursor to use - ownership is taken
parent	the parent range if this is a subrange of another range
insertBehavior	the behavior of this range when an insert happens immediately outside the range.

Definition at line 178 of file smartrange.cpp.

Member Function Documentation

void SmartRange::addNotifier ( SmartRangeNotifier * notifier )

Register a notifier to receive signals indicating change of state of this range.

NOTE: Make sure you call removeNotifier() when deleting the notifier before the range.

Parameters

notifier notifier to register. Ownership is not transferred.

Definition at line 918 of file smartrange.cpp.

void SmartRange::addWatcher ( SmartRangeWatcher * watcher )

Register a SmartRangeWatcher to receive calls indicating change of state of this range.

To finish receiving notifications, call removeWatcher().

NOTE: Make sure you call removeWachter() when deleting the notifier before the range.

Parameters

watcher the instance of a class which is to receive notifications about changes to this range.

Definition at line 891 of file smartrange.cpp.

void SmartRange::associateAction ( KAction * action )

Associate an action with this range.

The associated action(s) will be enabled when the caret enters the range, and disabled them on exit. The action is also added to the context menu when the mouse/caret is within an associated range.

Parameters

action KAction to associate with this range

Definition at line 528 of file smartrange.cpp.

const QList<KAction*>& KTextEditor::SmartRange::associatedActions ( ) const

inline

Access the list of currently associated KActions.

Returns: the list of associated actions

Definition at line 487 of file smartrange.h.

Attribute::Ptr SmartRange::attribute ( ) const

Gets the active Attribute for this range.

Returns: a pointer to the active attribute

Definition at line 636 of file smartrange.cpp.

void SmartRange::checkFeedback ( )

protectedvirtual

This routine is called when the range changes how much feedback it may need, eg. if it adds an action.

Definition at line 942 of file smartrange.cpp.

SmartRange * SmartRange::childAfter ( const SmartRange * range ) const

Find the child after range, if any.

The order is determined by the range end-cursors.

Parameters

range to seach forwards from

Returns: the range after range if one exists, otherwise null.

Definition at line 259 of file smartrange.cpp.

SmartRange * SmartRange::childBefore ( const SmartRange * range ) const

Find the child before range, if any.

The order is determined by the range end-cursors.

Parameters

range to seach backwards from

Returns: the range before range if one exists, otherwise null.

Definition at line 249 of file smartrange.cpp.

const QList< SmartRange * > & SmartRange::childRanges ( ) const

Get the ordered list of child ranges.

To insert a child range, simply set its parent to this range using setParentRange().

Returns: a list of child ranges.

Definition at line 244 of file smartrange.cpp.

void SmartRange::clearAndDeleteChildRanges ( )

Clears child ranges - i.e., clears the text that is covered by the ranges, and deletes the SmartRange objects.

Definition at line 582 of file smartrange.cpp.

void SmartRange::clearAssociatedActions ( )

Clears all associations between KActions and this range.

Definition at line 550 of file smartrange.cpp.

void SmartRange::clearChildRanges ( )

Clears child ranges - i.e., removes the text that is covered by the ranges.

The ranges themselves are not deleted.

See also: removeText()

Definition at line 567 of file smartrange.cpp.

KTextEditor::SmartRange::confineToRange ( const Range & range )

virtual

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Reimplemented from KTextEditor::Range.

Definition at line 208 of file smartrange.cpp.

virtual SmartRangeNotifier* KTextEditor::SmartRange::createNotifier ( )

protectedpure virtual

Called to request creation of a new SmartRangeNotifier for this object.

SmartRange * SmartRange::deepestRangeContaining	(	const Cursor &	pos,
		QStack< SmartRange * > *	rangesEntered = `0L`,
		QStack< SmartRange * > *	rangesExited = `0L`
	)		const

Finds the deepest range in the heirachy which contains position pos.

Allows the caller to determine which ranges were entered and exited by providing pointers to QStack<SmartRange*>.

If child-ranges overlap in the given position, the first smallest one is returned.

Parameters

pos	the cursor position to use in searching
rangesEntered	provide a QStack<SmartRange*> here to find out which ranges were entered during the traversal. The top item was the first descended.
rangesExited	provide a QStack<SmartRange*> here to find out which ranges were exited during the traversal. The top item was the first exited.

Returns: the deepest range (from and including this range) which contains pos, or null if no ranges contain this position.

Definition at line 452 of file smartrange.cpp.

QList< SmartRange * > SmartRange::deepestRangesContaining ( const Cursor & pos ) const

Definition at line 426 of file smartrange.cpp.

void SmartRange::deleteChildRanges ( )

Deletes child ranges - i.e., deletes the SmartRange objects only.

The underlying text is not affected.

Definition at line 573 of file smartrange.cpp.

void SmartRange::deletePrimaryNotifier ( )

When finished with the primaryNotifier(), call this method to save memory by having the SmartRangeNotifier deleted.

Note: If a notifier was first registered via addNotifier() rather than created inside primaryNotifier(), this method will delete that notifier. Text editor implementations should not use notifiers for internal purposes, instead use watchers (faster and has documentation to this effect)

Definition at line 932 of file smartrange.cpp.

int KTextEditor::SmartRange::depth ( ) const

inline

Calculate the current depth of this range.

Returns: the depth of this range, where 0 is no parent, 1 is one parent, etc.

Definition at line 310 of file smartrange.h.

void SmartRange::dissociateAction ( KAction * action )

Remove the association with an action from this range; it will no longer be managed.

Parameters

action KAction to dissociate from this range

Definition at line 543 of file smartrange.cpp.

Document * SmartRange::document ( ) const

Retrieve the document associated with this SmartRange.

Returns: a pointer to the associated document

Definition at line 523 of file smartrange.cpp.

KTextEditor::SmartRange::expandToRange ( const Range & range )

virtual

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Reimplemented from KTextEditor::Range.

Definition at line 220 of file smartrange.cpp.

SmartRange * SmartRange::firstRangeContaining ( const Cursor & pos ) const

Finds the first child range which contains position pos.

Parameters

pos	the cursor position to use in searching

Returns: the most shallow range (from and including this range) which contains pos

Definition at line 402 of file smartrange.cpp.

bool SmartRange::hasParent ( SmartRange * parent ) const

Determine whether parent is a parent of this range.

Parameters

parent range to check to see if it is a parent of this range.

Returns: true if parent is in the parent heirachy, otherwise false.

Definition at line 875 of file smartrange.cpp.

SmartRange::InsertBehaviors SmartRange::insertBehavior ( ) const

Returns how this range reacts to characters inserted immediately outside the range.

Returns: the current insert behavior.

Definition at line 556 of file smartrange.cpp.

bool SmartRange::isSmartRange ( ) const

virtual

Returns that this range is a SmartRange.

Reimplemented from KTextEditor::Range.

Definition at line 865 of file smartrange.cpp.

SmartRange * SmartRange::mostSpecificRange ( const Range & input ) const

Finds the most specific range in a heirachy for the given input range (ie.

the smallest range which wholly contains the input range)

In case of overlaps, the smallest containing range is chosen, if there are multiple of the same size, then the first one.

Parameters

input the range to use in searching

Returns: the deepest range which contains input

Definition at line 363 of file smartrange.cpp.

const QList< SmartRangeNotifier * > SmartRange::notifiers ( ) const

Returns a list of notifiers which are receiving signals indicating change of state of this range.

These notifiers may be receiving signals from other ranges as well.

Definition at line 913 of file smartrange.cpp.

SmartRange& KTextEditor::SmartRange::operator= ( const SmartRange & rhs )

inline

Assignment operator.

Assigns the current position of the provided range, rhs, only; does not assign watchers, notifiers, behavior etc.

Note: The assignment will be performed even if the provided range belongs to another Document.

Parameters

rhs	range to assign to this range.

Returns: a reference to this range, after assignment has occurred.

See also: setRange()

Definition at line 591 of file smartrange.h.

SmartRange& KTextEditor::SmartRange::operator= ( const Range & rhs )

inline

Assignment operator.

Assigns the current position of the provided range, rhs.

Parameters

rhs	range to assign to this range.

Returns: a reference to this range, after assignment has occurred.

See also: setRange()

Definition at line 603 of file smartrange.h.

int SmartRange::overlapCount ( ) const

Returns the count of ranges within the parent-range that end behind this range, and that overlap this range.

Definition at line 421 of file smartrange.cpp.

SmartRange* KTextEditor::SmartRange::parentRange ( ) const

inline

Returns this range's parent range, if one exists.

At all times, this range will be contained within parentRange().

Returns: a pointer to the current parent range

Definition at line 277 of file smartrange.h.

SmartRangeNotifier * SmartRange::primaryNotifier ( )

Connect to a notifier to receive signals indicating change of state of this range.

This function creates a notifier if none is already bound to this range; if one has already been assigned this will return the first notifier.

If you have finished with notifications for a reasonable period of time you can save memory by calling deleteNotifier().

Definition at line 905 of file smartrange.cpp.

void SmartRange::rangeChanged	(	Cursor *	cursor,
		const Range &	from
	)

protectedvirtual

Notify this range that one or both of the cursors' position has changed directly.

Parameters

cursor	the cursor that changed. If null, both cursors have changed.
from	the previous position of this range

Reimplemented from KTextEditor::Range.

Definition at line 687 of file smartrange.cpp.

void SmartRange::rebuildChildStructure ( )

protected

Is called after child-ranges have changed internally without the rangeChanged() notification, for example after translations.

It rebuilds the child-structure, so it is consistent again.

Re-order

Update overlap

Definition at line 660 of file smartrange.cpp.

void SmartRange::removeNotifier ( SmartRangeNotifier * notifier )

Deregister a notifier and no longer deliver signals indicating change of state of this range.

Parameters

notifier notifier to deregister.

Definition at line 926 of file smartrange.cpp.

bool SmartRange::removeText ( bool block = false )

virtual

Remove text contained within this range.

The range itself will not be deleted.

Parameters

block specify whether the text should be deleted from the range's visual block, rather than all the text within the range.

Definition at line 651 of file smartrange.cpp.

void SmartRange::removeWatcher ( SmartRangeWatcher * watcher )

Stop delivery of notifications to a SmartRangeWatcher.

Parameters

watcher the watcher that no longer wants notifications.

Definition at line 899 of file smartrange.cpp.

bool SmartRange::replaceText	(	const QStringList &	text,
		bool	block = `false`
	)

virtual

Replace text in this range with text.

Parameters

text	text to use as a replacement
block	insert this text as a visual block of text rather than a linear sequence

Returns: true on success, otherwise false

Definition at line 646 of file smartrange.cpp.

void SmartRange::setAttribute ( Attribute::Ptr attribute )

Sets the currently active attribute for this range.

Parameters

attribute Attribute to assign to this range. If null, simply removes the previous Attribute.

Note: SmartInterface::addHighlightToDocument must be called with the top-range before the highlighting can work.

Definition at line 620 of file smartrange.cpp.

void SmartRange::setInsertBehavior ( InsertBehaviors behavior )

Determine how the range should react to characters inserted immediately outside the range.

Todo:: does this need a custom function to enable determining of the behavior based on the text that is inserted / deleted?

Parameters

behavior the insertion behavior to use for future edits

See also: InsertBehavior

Definition at line 561 of file smartrange.cpp.

void SmartRange::setParentRange ( SmartRange * r )

virtual

Set this range's parent range.

At all times, this range will be contained within parentRange(). So, if it is outside of the new parent to begin with, it will be expanded automatically.

When being inserted into the parent range, the parent range will be fit in between any other pre-existing child ranges, and may resize them so as not to overlap. However, once insertion has occurred, changing this range directly will only resize the others, it will not change the order of the ranges. To change the order, unset the parent range, change the range, and re-set the parent range.

Parameters

r	range to become the new parent of this range

Definition at line 594 of file smartrange.cpp.

void SmartRange::setRange ( const Range & range )

virtual

Set the start and end cursors to range.start() and range.end() respectively.

Parameters

range range to assign to this range

This function also provides any required adjustment of parent and child ranges, and notification of the change if required.

Reimplemented from KTextEditor::Range.

Definition at line 232 of file smartrange.cpp.

SmartCursor& KTextEditor::SmartRange::smartEnd ( )

inline

Get the end point of this range.

This version returns a casted version of end(), as SmartRanges always use SmartCursors as the start() and end().

Returns: a reference to the end of this range.

Definition at line 163 of file smartrange.h.

const SmartCursor& KTextEditor::SmartRange::smartEnd ( ) const

inline

Get the end point of this range.

This version returns a casted version of end(), as SmartRanges always use SmartCursors as the start() and end().

Returns: a const reference to the end of this range.

Definition at line 173 of file smartrange.h.

SmartCursor& KTextEditor::SmartRange::smartStart ( )

inline

Get the start point of this range.

This version returns a casted version of start(), as SmartRanges always use SmartCursors as the start() and end().

Returns: a reference to the start of this range.

Definition at line 143 of file smartrange.h.

const SmartCursor& KTextEditor::SmartRange::smartStart ( ) const

inline

Get the start point of this range.

This version returns a casted version of start(), as SmartRanges always use SmartCursors as the start() and end().

Returns: a const reference to the start of this range.

Definition at line 153 of file smartrange.h.

QStringList SmartRange::text ( bool block = false ) const

virtual

Retrieve the text which is contained within this range.

Parameters

block specify whether the text should be returned from the range's visual block, rather than all the text within the range.

Definition at line 641 of file smartrange.cpp.

SmartRange* KTextEditor::SmartRange::topParentRange ( ) const

inline

Returns the range's top parent range, or this range if there are no parents.

Returns: a pointer to the top parent range

Definition at line 318 of file smartrange.h.

SmartRange * SmartRange::toSmartRange ( ) const

virtual

Returns this range as a SmartRange, if it is one.

Reimplemented from KTextEditor::Range.

Definition at line 870 of file smartrange.cpp.

const QList< SmartRangeWatcher * > & SmartRange::watchers ( ) const

Returns a list of registered SmartRangeWatchers.

Note: this function may return watchers internal to the text editor's implementation, eg. in the case of arbitrary highlighting and kate part. Removing these watchers with removeWatcher() will result in malfunction.

Definition at line 886 of file smartrange.cpp.

The documentation for this class was generated from the following files:

KTextEditor

Public Types

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

KTextEditor

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