KTextEditor::DocumentCursor
#include <KTextEditor/DocumentCursor>
Public Types | |
enum | WrapBehavior { Wrap = 0x0 , NoWrap = 0x1 } |
Public Member Functions | |
DocumentCursor ()=delete | |
DocumentCursor (const DocumentCursor &other) | |
DocumentCursor (KTextEditor::Document *document) | |
DocumentCursor (KTextEditor::Document *document, int line, int column) | |
DocumentCursor (KTextEditor::Document *document, KTextEditor::Cursor position) | |
~DocumentCursor () | |
bool | atEndOfDocument () const |
bool | atEndOfLine () const |
bool | atStartOfDocument () const |
bool | atStartOfLine () const |
int | column () const |
Document * | document () const |
bool | gotoNextLine () |
bool | gotoPreviousLine () |
bool | isValid () const |
bool | isValidTextPosition () const |
int | line () const |
void | makeValid () |
bool | move (int chars, WrapBehavior wrapBehavior=Wrap) |
operator Cursor () const | |
DocumentCursor & | operator= (const DocumentCursor &other) |
void | setColumn (int column) |
void | setLine (int line) |
void | setPosition (int line, int column) |
void | setPosition (KTextEditor::Cursor position) |
Cursor | toCursor () const |
Detailed Description
A Cursor which is bound to a specific Document.
Introduction
A DocumentCursor is an extension of the basic Cursor class. The DocumentCursor is bound to a specific Document instance. This way, the cursor provides additional functions like gotoNextLine(), gotoPreviousLine() and move() according to the WrapBehavior.
The only difference to a MovingCursor is that the DocumentCursor's position does not automatically move on text manipulation.
Validity
When constructing a DocumentCursor, a valid document pointer is required in the constructor. A null pointer will assert in debug builds. Further, a DocumentCursor should only be used as long as the Document exists, otherwise the DocumentCursor contains a dangling pointer to the previously assigned Document.
Example
A DocumentCursor is created and used like this:
Definition at line 55 of file documentcursor.h.
Member Enumeration Documentation
◆ WrapBehavior
Wrap behavior for end of line treatement used in move().
Enumerator | |
---|---|
Wrap | wrap at end of line |
NoWrap | do not wrap at end of line |
Definition at line 64 of file documentcursor.h.
Constructor & Destructor Documentation
◆ DocumentCursor() [1/5]
KTextEditor::DocumentCursor::DocumentCursor | ( | KTextEditor::Document * | document | ) |
Constructor that creates a DocumentCursor at the invalid position (-1, -1).
- See also
- isValid()
Definition at line 12 of file documentcursor.cpp.
◆ DocumentCursor() [2/5]
KTextEditor::DocumentCursor::DocumentCursor | ( | KTextEditor::Document * | document, |
KTextEditor::Cursor | position ) |
Constructor that creates a DocumentCursor located at position
.
Definition at line 20 of file documentcursor.cpp.
◆ DocumentCursor() [3/5]
KTextEditor::DocumentCursor::DocumentCursor | ( | KTextEditor::Document * | document, |
int | line, | ||
int | column ) |
Constructor that creates a DocumentCursor located at line
and column
.
Definition at line 28 of file documentcursor.cpp.
◆ DocumentCursor() [4/5]
KTextEditor::DocumentCursor::DocumentCursor | ( | const DocumentCursor & | other | ) |
Copy constructor.
Make sure the Document of the DocumentCursor is valid.
Definition at line 36 of file documentcursor.cpp.
◆ ~DocumentCursor()
|
inline |
Destruct the moving cursor.
Definition at line 142 of file documentcursor.h.
◆ DocumentCursor() [5/5]
|
delete |
no default constructor, as we need a document.
Member Function Documentation
◆ atEndOfDocument()
bool KTextEditor::DocumentCursor::atEndOfDocument | ( | ) | const |
Determine if this cursor is located at the end of the last line in the document.
- Returns
- true if the cursor is at the end of the document, otherwise false.
Definition at line 94 of file documentcursor.cpp.
◆ atEndOfLine()
bool KTextEditor::DocumentCursor::atEndOfLine | ( | ) | const |
Determine if this cursor is located at the end of the current line.
- Returns
- true if the cursor is situated at the end of the line, otherwise false.
Definition at line 84 of file documentcursor.cpp.
◆ atStartOfDocument()
bool KTextEditor::DocumentCursor::atStartOfDocument | ( | ) | const |
Determine if this cursor is located at line 0 and column 0.
- Returns
- true if the cursor is at start of the document, otherwise false.
Definition at line 89 of file documentcursor.cpp.
◆ atStartOfLine()
bool KTextEditor::DocumentCursor::atStartOfLine | ( | ) | const |
Determine if this cursor is located at column 0 of a valid text line.
- Returns
- true if cursor is a valid text position and column()=0, otherwise false.
Definition at line 79 of file documentcursor.cpp.
◆ column()
|
inline |
Retrieve the column on which this cursor is situated.
- Returns
- column number, where 0 is the first column.
Definition at line 134 of file documentcursor.h.
◆ document()
|
inline |
Gets the document to which this cursor is bound.
- Returns
- a pointer to the document
Definition at line 104 of file documentcursor.h.
◆ gotoNextLine()
bool KTextEditor::DocumentCursor::gotoNextLine | ( | ) |
Moves the cursor to the next line and sets the column to 0.
If the cursor position is already in the last line of the document, the cursor position remains unchanged and the return value is false.
- Returns
- true on success, otherwise false
Definition at line 102 of file documentcursor.cpp.
◆ gotoPreviousLine()
bool KTextEditor::DocumentCursor::gotoPreviousLine | ( | ) |
Moves the cursor to the previous line and sets the column to 0.
If the cursor position is already in line 0, the cursor position remains unchanged and the return value is false.
- Returns
- true on success, otherwise false
Definition at line 114 of file documentcursor.cpp.
◆ isValid()
|
inline |
Check if the current position of this cursor is a valid position, i.e.
whether line() >= 0 and column() >= 0.
- Returns
- true, if the cursor position is valid, otherwise false
Definition at line 165 of file documentcursor.h.
◆ isValidTextPosition()
|
inline |
Check if this cursor is currently at a valid text position.
A cursor position at (line, column) is valid, if
- line >= 0 and line < lines() holds, and
- column >= 0 and column <= lineLength(column).
The text position is also invalid if it is inside a Unicode surrogate. Therefore, use this function when iterating over the characters of a line.
Definition at line 181 of file documentcursor.h.
◆ line()
|
inline |
Retrieve the line on which this cursor is situated.
- Returns
- line number, where 0 is the first line.
Definition at line 125 of file documentcursor.h.
◆ makeValid()
void KTextEditor::DocumentCursor::makeValid | ( | ) |
Make sure the cursor position is at a valid text position according to the following rules.
- If the cursor is invalid(), i.e. either line < 0 or column < 0, it is set to (0, 0).
- If the cursor's line is past the number of lines in the document, the cursor is set to Document::documentEnd().
- If the cursor's column is past the line length, the cursor column is set to the line length.
- If the cursor is inside a Unicode surrogate, the cursor is moved to the beginning of the Unicode surrogate.
After calling makeValid(), the cursor is guaranteed to be located at a valid text position.
- See also
- isValidTextPosition(), isValid()
Definition at line 42 of file documentcursor.cpp.
◆ move()
bool KTextEditor::DocumentCursor::move | ( | int | chars, |
WrapBehavior | wrapBehavior = Wrap ) |
Moves the cursor chars
character forward or backwards.
If wrapBehavior equals WrapBehavior::Wrap, the cursor is automatically wrapped to the next line at the end of a line.
When moving backwards, the WrapBehavior does not have any effect.
- Note
- If the cursor could not be moved the amount of chars requested, the cursor is not moved at all!
- Returns
- true on success, otherwise false
Definition at line 126 of file documentcursor.cpp.
◆ operator Cursor()
|
inline |
Convert this clever cursor into a dumb one.
Equal to toCursor, allowing to use implicit conversion.
- Returns
- normal cursor
Definition at line 299 of file documentcursor.h.
◆ operator=()
|
inline |
Assignment operator.
Same as the copy constructor. Make sure that the assigned Document is a valid document pointer.
Definition at line 311 of file documentcursor.h.
◆ setColumn()
void KTextEditor::DocumentCursor::setColumn | ( | int | column | ) |
Set the cursor column to column.
- Parameters
-
column new cursor column
Definition at line 74 of file documentcursor.cpp.
◆ setLine()
void KTextEditor::DocumentCursor::setLine | ( | int | line | ) |
Set the cursor line to line.
- Parameters
-
line new cursor line
Definition at line 69 of file documentcursor.cpp.
◆ setPosition() [1/2]
void KTextEditor::DocumentCursor::setPosition | ( | int | line, |
int | column ) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Set the cursor position to line and column.
- Parameters
-
line new cursor line column new cursor column
Definition at line 64 of file documentcursor.cpp.
◆ setPosition() [2/2]
|
inline |
Set the current cursor position to position.
If position is not valid, meaning that either its line < 0 or its column < 0, then the document cursor will also be invalid
- Parameters
-
position new cursor position
Definition at line 116 of file documentcursor.h.
◆ toCursor()
|
inline |
Convert this clever cursor into a dumb one.
- Returns
- normal cursor
Definition at line 290 of file documentcursor.h.
The documentation for this class was generated from the following files:
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