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* VisualEditor UserInterface Sequence class.
*
* @copyright See AUTHORS.txt
*/
/**
* Key sequence.
*
* @class
*
* @constructor
* @param {string} name Symbolic name
* @param {string} commandName Command name this sequence executes
* @param {string|Array|RegExp} data Data to match. String, linear data array, or regular expression.
* When using a RegularExpression always match the end of the sequence with a '$' so that
* only sequences next to the user's cursor match.
* @param {number} [strip=0] Number of data elements to strip after execution
* (from the right)
* @param {Object} [config] [description]
* @cfg {boolean} [setSelection=false] Whether to set the selection to the
* range matching the sequence before executing the command.
* @cfg {boolean} [delayed=false] Whether to wait for the user to stop typing matching content
* before executing the command. When the sequence matches typed text, it will not be executed
* immediately, but only after more non-matching text is added afterwards or the selection is
* changed. This is useful for variable-length sequences (defined with RegExps).
* @cfg {boolean} [checkOnPaste=false] Whether the sequence should also be matched after paste.
* @cfg {boolean} [checkOnDelete=false] Whether the sequence should also be matched after delete.
*/
ve.ui.Sequence = function VeUiSequence( name, commandName, data, strip, config ) {
this.name = name;
this.commandName = commandName;
this.data = data;
this.strip = strip || 0;
if ( typeof config === 'object' ) {
// TODO: Add `config = config || {};` when variadic fallback is dropped.
this.setSelection = !!config.setSelection;
this.delayed = !!config.delayed;
this.checkOnPaste = !!config.checkOnPaste;
this.checkOnDelete = !!config.checkOnDelete;
} else {
// Backwards compatibility with variadic arguments
this.setSelection = !!arguments[ 4 ];
this.delayed = !!arguments[ 5 ];
this.checkOnPaste = !!arguments[ 6 ];
this.checkOnDelete = !!arguments[ 7 ];
}
};
/* Inheritance */
OO.initClass( ve.ui.Sequence );
/* Methods */
/**
* Check if the sequence matches a given offset in the data
*
* @param {ve.dm.ElementLinearData} data String or linear data
* @param {number} offset
* @param {string} plaintext Plain text of data
* @return {ve.Range|null} Range corresponding to the match, or else null
*/
ve.ui.Sequence.prototype.match = function ( data, offset, plaintext ) {
var i, j = offset - 1;
if ( this.data instanceof RegExp ) {
i = plaintext.search( this.data );
return ( i < 0 ) ? null :
new ve.Range( offset - plaintext.length + i, offset );
}
for ( i = this.data.length - 1; i >= 0; i--, j-- ) {
if ( typeof this.data[ i ] === 'string' ) {
if ( this.data[ i ] !== data.getCharacterData( j ) ) {
return null;
}
} else Iif ( !ve.compare( this.data[ i ], data.getData( j ), true ) ) {
return null;
}
}
return new ve.Range( offset - this.data.length, offset );
};
/**
* Execute the command associated with the sequence
*
* @param {ve.ui.Surface} surface
* @param {ve.Range} range Range to set
* @return {boolean} The command executed
*/
ve.ui.Sequence.prototype.execute = function ( surface, range ) {
var surfaceModel = surface.getModel();
Iif ( surface.getCommands().indexOf( this.getCommandName() ) === -1 ) {
return false;
}
var command = surface.commandRegistry.lookup( this.getCommandName() );
Iif ( !command ) {
return false;
}
var stripFragment;
Eif ( this.strip ) {
var stripRange = surfaceModel.getSelection().getRange();
stripFragment = surfaceModel.getLinearFragment(
// noAutoSelect = true, excludeInsertions = true
new ve.Range( stripRange.end, stripRange.end - this.strip ), true, true
);
}
surfaceModel.breakpoint();
// Use SurfaceFragment rather than Selection to automatically adjust the selection for any changes
// (additions, removals) caused by executing the command
var originalSelectionFragment = surfaceModel.getFragment();
Iif ( this.setSelection ) {
surfaceModel.setLinearSelection( range );
}
var args;
// For sequences that trigger dialogs, pass an extra flag so the window knows
// to un-strip the sequence if it is closed without action. See ve.ui.WindowAction.
Iif ( command.getAction() === 'window' && command.getMethod() === 'open' ) {
args = ve.copy( command.args );
args[ 1 ] = args[ 1 ] || {};
args[ 1 ].strippedSequence = !!this.strip;
}
Eif ( stripFragment ) {
// Strip the typed text. This will be undone if the action triggered was
// window/open and the window is dismissed
stripFragment.removeContent();
}
// `args` can be passed undefined, and the defaults will be used
var executed = command.execute( surface, args, 'sequence' );
// Restore user's selection if:
// * This sequence was not executed after all
// * This sequence is delayed, so it only executes after the user changed the selection
Iif ( !executed || this.delayed ) {
originalSelectionFragment.select();
}
Iif ( stripFragment && !executed ) {
surfaceModel.undo();
// Prevent redoing (which would remove the typed text)
surfaceModel.truncateUndoStack();
surfaceModel.emit( 'history' );
}
return executed;
};
/**
* Get the symbolic name of the sequence
*
* @return {string} Symbolic name
*/
ve.ui.Sequence.prototype.getName = function () {
return this.name;
};
/**
* Get the command name which the sequence will execute
*
* @return {string} Command name
*/
ve.ui.Sequence.prototype.getCommandName = function () {
return this.commandName;
};
/**
* Get a representation of the sequence useful for display
*
* What this means depends a bit on how the sequence was defined:
* - It strips out undisplayable things like the paragraph-start marker.
* - Regexps are just returned as a toString of the regexp.
*
* @param {boolean} explode Whether to return the message split up into some
* reasonable sequence of inputs required to trigger the sequence (regexps
* in sequences will be considered a single "input" as a toString of
* the regexp, because they're hard to display no matter what…)
* @return {string} Message for display
*/
ve.ui.Sequence.prototype.getMessage = function ( explode ) {
var data;
if ( typeof this.data === 'string' ) {
data = this.data.split( '' );
} else if ( this.data instanceof RegExp ) {
data = [ this.data.toString() ];
} else {
data = this.data.filter( function ( key ) {
return !ve.isPlainObject( key );
} );
}
return explode ? data : data.join( '' );
};
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