#include <qtextdocument_p.h>

Public Types
enum	Command { Inserted = 0, Removed = 1, CharFormatChanged = 2, BlockFormatChanged = 3, BlockInserted = 4, BlockRemoved = 5, BlockAdded = 6, BlockDeleted = 7, GroupFormatChange = 8, CursorMoved = 9, Custom = 256 }

enum	Operation { KeepCursor = 0, MoveCursor = 1 }

Public Functions
bool	tryMerge (const QTextUndoCommand &other)

Public Variables
union {
int blockFormat

QAbstractUndoItem * custom

quint32 length

int objectIndex

};

uint	block_end: 1

uint	block_padding: 6

uint	block_part: 1

quint16	command

int	format

quint8	operation

quint32	pos

quint32	revision

quint32	strPos

Detailed Description

Definition at line 123 of file qtextdocument_p.h.

Enumerations

◆ Command

enum QTextUndoCommand::Command

Enumerator
Inserted
Removed
CharFormatChanged
BlockFormatChanged
BlockInserted
BlockRemoved
BlockAdded
BlockDeleted
GroupFormatChange
CursorMoved
Custom

Definition at line 126 of file qtextdocument_p.h.

                  {
         Inserted = 0,
         Removed = 1,
         CharFormatChanged = 2,
         BlockFormatChanged = 3,
         BlockInserted = 4,
         BlockRemoved = 5,
         BlockAdded = 6,
         BlockDeleted = 7,
         GroupFormatChange = 8,
         CursorMoved = 9,
         Custom = 256
     };

◆ Operation

enum QTextUndoCommand::Operation

Enumerator
KeepCursor
MoveCursor

Definition at line 139 of file qtextdocument_p.h.

                    {
         KeepCursor = 0,
         MoveCursor = 1
     };

Functions

◆ tryMerge()

bool QTextUndoCommand::tryMerge ( const QTextUndoCommand & other )

Definition at line 145 of file qtextdocument_p.cpp.

Referenced by QTextDocumentPrivate::appendUndoItem().

 {
     if (command != other.command)
         return false;
 
     if (command == Inserted
         && (pos + length == other.pos)
         && (strPos + length == other.strPos)
         && format == other.format) {
 
         length += other.length;
         return true;
     }
 
     // removal to the 'right' using 'Delete' key
     if (command == Removed
         && pos == other.pos
         && (strPos + length == other.strPos)
         && format == other.format) {
 
         length += other.length;
         return true;
     }
 
     // removal to the 'left' using 'Backspace'
     if (command == Removed
         && (other.pos + other.length == pos)
         && (other.strPos + other.length == strPos)
         && (format == other.format)) {
 
         int l = length;
         (*this) = other;
 
         length += l;
         return true;
     }
 
     return false;
 }