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* VisualEditor DataModel Scalable class.
*
* @copyright See AUTHORS.txt
*/
/**
* Scalable object.
*
* @class
* @mixins OO.EventEmitter
*
* @constructor
* @param {Object} [config] Configuration options
* @cfg {boolean} [fixedRatio=true] Object has a fixed aspect ratio
* @cfg {Object} [currentDimensions] Current dimensions, width & height
* @cfg {Object} [originalDimensions] Original dimensions, width & height
* @cfg {Object} [defaultDimensions] Default dimensions, width & height
* @cfg {boolean} [isDefault] Object is using its default dimensions
* @cfg {Object} [minDimensions] Minimum dimensions, width & height
* @cfg {Object} [maxDimensions] Maximum dimensions, width & height
* @cfg {boolean} [enforceMin=true] Enforce the minimum dimensions
* @cfg {boolean} [enforceMax=true] Enforce the maximum dimensions
*/
ve.dm.Scalable = function VeDmScalable( config ) {
config = ve.extendObject( {
fixedRatio: true,
enforceMin: true,
enforceMax: true
}, config );
// Mixin constructors
OO.EventEmitter.call( this );
// Computed properties
this.ratio = null;
this.valid = null;
this.defaultSize = false;
// Initialize
this.currentDimensions = null;
this.defaultDimensions = null;
this.originalDimensions = null;
this.minDimensions = null;
this.maxDimensions = null;
// Properties
this.fixedRatio = config.fixedRatio;
if ( config.currentDimensions ) {
this.setCurrentDimensions( config.currentDimensions );
}
if ( config.originalDimensions ) {
this.setOriginalDimensions( config.originalDimensions );
}
if ( config.defaultDimensions ) {
this.setDefaultDimensions( config.defaultDimensions );
}
if ( config.isDefault ) {
this.toggleDefault( !!config.isDefault );
}
if ( config.minDimensions ) {
this.setMinDimensions( config.minDimensions );
}
if ( config.maxDimensions ) {
this.setMaxDimensions( config.maxDimensions );
}
this.setEnforcedMin( config.enforceMin );
this.setEnforcedMax( config.enforceMax );
};
/* Inheritance */
OO.mixinClass( ve.dm.Scalable, OO.EventEmitter );
/* Events */
/**
* Current changed
*
* @event currentSizeChange
* @param {Object} currentDimensions Current dimensions width and height
*/
/**
* Default size or state changed
*
* @event defaultSizeChange
* @param {boolean} isDefault The size is default
*/
/**
* Original size changed
*
* @event originalSizeChange
* @param {Object} originalDimensions Original dimensions width and height
*/
/**
* Min size changed
*
* @event minSizeChange
* @param {Object} minDimensions Min dimensions width and height
*/
/**
* Max size changed
*
* @event maxSizeChange
* @param {Object} maxDimensions Max dimensions width and height
*/
/**
* Calculate the dimensions from a given value of either width or height.
* This method doesn't take into account any restrictions of minimum or maximum,
* it simply calculates the new dimensions according to the aspect ratio in case
* it exists.
*
* If aspect ratio does not exist, or if the original object is empty, or if the
* original object is fully specified, the object is returned as-is without
* calculations.
*
* @param {Object} dimensions Dimensions object with either width or height
* if both are given, the object will be returned as-is.
* @param {number} [dimensions.width] The width of the image
* @param {number} [dimensions.height] The height of the image
* @param {number} [ratio] The image width/height ratio, if it exists
* @return {Object} Dimensions object with width and height
*/
ve.dm.Scalable.static.getDimensionsFromValue = function ( dimensions, ratio ) {
dimensions = ve.copy( dimensions );
// Normalize for 'empty' values that are specifically given
// so if '' is explicitly given, it should be translated to 0
if ( dimensions.width === '' ) {
dimensions.width = 0;
}
if ( dimensions.height === '' ) {
dimensions.height = 0;
}
// Calculate the opposite size if needed
if ( !dimensions.height && ratio !== null && +dimensions.width ) {
dimensions.height = Math.round( dimensions.width / ratio );
}
if ( !dimensions.width && ratio !== null && +dimensions.height ) {
dimensions.width = Math.round( dimensions.height * ratio );
}
return dimensions;
};
/**
* Check if an object is a dimensions object.
* Make sure that if width or height are set, they are not 'undefined'.
*
* @param {Object} dimensions A dimensions object to test
* @return {boolean} Valid or invalid dimensions object
*/
ve.dm.Scalable.static.isDimensionsObjectValid = function ( dimensions ) {
if (
dimensions &&
!ve.isEmptyObject( dimensions ) &&
(
dimensions.width !== undefined ||
dimensions.height !== undefined
)
) {
return true;
}
return false;
};
/* Methods */
/**
* Clone the current scalable object
*
* @return {ve.dm.Scalable} Cloned scalable object
*/
ve.dm.Scalable.prototype.clone = function () {
var currentDimensions = this.getCurrentDimensions(),
originalDimensions = this.getOriginalDimensions(),
defaultDimensions = this.getDefaultDimensions(),
minDimensions = this.getMinDimensions(),
maxDimensions = this.getMaxDimensions(),
config = {
isDefault: !!this.isDefault(),
enforceMin: !!this.isEnforcedMin(),
enforceMax: !!this.isEnforcedMax()
};
if ( currentDimensions ) {
config.currentDimensions = ve.copy( currentDimensions );
}
if ( originalDimensions ) {
config.originalDimensions = ve.copy( originalDimensions );
}
if ( defaultDimensions ) {
config.defaultDimensions = ve.copy( defaultDimensions );
}
if ( minDimensions ) {
config.minDimensions = ve.copy( minDimensions );
}
if ( maxDimensions ) {
config.maxDimensions = ve.copy( maxDimensions );
}
return new this.constructor( config );
};
/**
* Set the fixed aspect ratio from specified dimensions.
*
* @param {Object} dimensions Dimensions object with width & height
*/
ve.dm.Scalable.prototype.setRatioFromDimensions = function ( dimensions ) {
if ( dimensions && dimensions.width && dimensions.height ) {
this.ratio = dimensions.width / dimensions.height;
}
this.valid = null;
};
/**
* Set the current dimensions
*
* Also sets the aspect ratio if not set and in fixed ratio mode.
*
* @param {Object} dimensions Dimensions object with width & height
* @fires currentSizeChange
*/
ve.dm.Scalable.prototype.setCurrentDimensions = function ( dimensions ) {
if (
this.constructor.static.isDimensionsObjectValid( dimensions ) &&
!ve.compare( dimensions, this.getCurrentDimensions() )
) {
this.currentDimensions = ve.copy( dimensions );
// Only use current dimensions for ratio if it isn't set
if ( this.fixedRatio && !this.ratio ) {
this.setRatioFromDimensions( this.getCurrentDimensions() );
}
this.valid = null;
this.emit( 'currentSizeChange', this.getCurrentDimensions() );
}
};
/**
* Set the original dimensions
*
* Also resets the aspect ratio if in fixed ratio mode.
*
* @param {Object} dimensions Dimensions object with width & height
* @fires originalSizeChange
*/
ve.dm.Scalable.prototype.setOriginalDimensions = function ( dimensions ) {
if (
this.constructor.static.isDimensionsObjectValid( dimensions ) &&
!ve.compare( dimensions, this.getOriginalDimensions() )
) {
this.originalDimensions = ve.copy( dimensions );
// Always overwrite ratio
if ( this.fixedRatio ) {
this.setRatioFromDimensions( this.getOriginalDimensions() );
}
this.valid = null;
this.emit( 'originalSizeChange', this.getOriginalDimensions() );
}
};
/**
* Set the default dimensions
*
* @param {Object} dimensions Dimensions object with width & height
* @fires defaultSizeChange
*/
ve.dm.Scalable.prototype.setDefaultDimensions = function ( dimensions ) {
if (
this.constructor.static.isDimensionsObjectValid( dimensions ) &&
!ve.compare( dimensions, this.getDefaultDimensions() )
) {
this.defaultDimensions = ve.copy( dimensions );
this.valid = null;
this.emit( 'defaultSizeChange', this.isDefault() );
}
};
/**
* Reset and remove the default dimensions
*
* @fires defaultSizeChange
*/
ve.dm.Scalable.prototype.clearDefaultDimensions = function () {
if ( this.defaultDimensions !== null ) {
this.defaultDimensions = null;
this.valid = null;
this.emit( 'defaultSizeChange', this.isDefault() );
}
};
/**
* Reset and remove the default dimensions
*
* @fires originalSizeChange
*/
ve.dm.Scalable.prototype.clearOriginalDimensions = function () {
if ( this.originalDimensions !== null ) {
this.originalDimensions = null;
this.valid = null;
this.emit( 'originalSizeChange', this.isDefault() );
}
};
/**
* Toggle the default size setting, or set it to particular value
*
* @param {boolean} [isDefault] Default or not, toggles if unset
* @fires defaultSizeChange
*/
ve.dm.Scalable.prototype.toggleDefault = function ( isDefault ) {
if ( isDefault === undefined ) {
isDefault = !this.isDefault();
}
if ( this.isDefault() !== isDefault ) {
this.defaultSize = isDefault;
if ( isDefault ) {
this.setCurrentDimensions(
this.getDefaultDimensions()
);
}
this.emit( 'defaultSizeChange', this.isDefault() );
}
};
/**
* Set the minimum dimensions
*
* @param {Object} dimensions Dimensions object with width & height
* @fires minSizeChange
*/
ve.dm.Scalable.prototype.setMinDimensions = function ( dimensions ) {
if (
this.constructor.static.isDimensionsObjectValid( dimensions ) &&
!ve.compare( dimensions, this.getMinDimensions() )
) {
this.minDimensions = ve.copy( dimensions );
this.valid = null;
this.emit( 'minSizeChange', dimensions );
}
};
/**
* Set the maximum dimensions
*
* @param {Object} dimensions Dimensions object with width & height
* @fires maxSizeChange
*/
ve.dm.Scalable.prototype.setMaxDimensions = function ( dimensions ) {
if (
this.constructor.static.isDimensionsObjectValid( dimensions ) &&
!ve.compare( dimensions, this.getMaxDimensions() )
) {
this.maxDimensions = ve.copy( dimensions );
this.emit( 'maxSizeChange', dimensions );
this.valid = null;
}
};
/**
* Clear the minimum dimensions
*
* @fires minSizeChange
*/
ve.dm.Scalable.prototype.clearMinDimensions = function () {
if ( this.minDimensions !== null ) {
this.minDimensions = null;
this.valid = null;
this.emit( 'minSizeChange', this.minDimensions );
}
};
/**
* Clear the maximum dimensions
*
* @fires maxSizeChange
*/
ve.dm.Scalable.prototype.clearMaxDimensions = function () {
if ( this.maxDimensions !== null ) {
this.maxDimensions = null;
this.valid = null;
this.emit( 'maxSizeChange', this.maxDimensions );
}
};
/**
* Get the original dimensions
*
* @return {Object} Dimensions object with width & height
*/
ve.dm.Scalable.prototype.getCurrentDimensions = function () {
return this.currentDimensions;
};
/**
* Get the original dimensions
*
* @return {Object} Dimensions object with width & height
*/
ve.dm.Scalable.prototype.getOriginalDimensions = function () {
return this.originalDimensions;
};
/**
* Get the default dimensions
*
* @return {Object} Dimensions object with width & height
*/
ve.dm.Scalable.prototype.getDefaultDimensions = function () {
return this.defaultDimensions;
};
/**
* Get the default state of the scalable object
*
* @return {boolean} Default size or custom
*/
ve.dm.Scalable.prototype.isDefault = function () {
return this.defaultSize;
};
/**
* Get the minimum dimensions
*
* @return {Object} Dimensions object with width & height
*/
ve.dm.Scalable.prototype.getMinDimensions = function () {
return this.minDimensions;
};
/**
* Get the maximum dimensions
*
* @return {Object} Dimensions object with width & height
*/
ve.dm.Scalable.prototype.getMaxDimensions = function () {
return this.maxDimensions;
};
/**
* The object enforces the minimum dimensions when scaling
*
* @return {boolean} Enforces the minimum dimensions
*/
ve.dm.Scalable.prototype.isEnforcedMin = function () {
return this.enforceMin;
};
/**
* The object enforces the maximum dimensions when scaling
*
* @return {boolean} Enforces the maximum dimensions
*/
ve.dm.Scalable.prototype.isEnforcedMax = function () {
return this.enforceMax;
};
/**
* Set enforcement of minimum dimensions
*
* @param {boolean} enforceMin Enforces the minimum dimensions
*/
ve.dm.Scalable.prototype.setEnforcedMin = function ( enforceMin ) {
this.valid = null;
this.enforceMin = !!enforceMin;
};
/**
* Set enforcement of maximum dimensions
*
* @param {boolean} enforceMax Enforces the maximum dimensions
*/
ve.dm.Scalable.prototype.setEnforcedMax = function ( enforceMax ) {
this.valid = null;
this.enforceMax = !!enforceMax;
};
/**
* Get the fixed aspect ratio (width/height)
*
* @return {number} Aspect ratio
*/
ve.dm.Scalable.prototype.getRatio = function () {
return this.ratio;
};
/**
* Check if the object has a fixed ratio
*
* @return {boolean} The object has a fixed ratio
*/
ve.dm.Scalable.prototype.isFixedRatio = function () {
return this.fixedRatio;
};
/**
* Get the current scale of the object
*
* @return {number|null} A scale (1=100%), or null if not applicable
*/
ve.dm.Scalable.prototype.getCurrentScale = function () {
if ( !this.isFixedRatio() || !this.getCurrentDimensions() || !this.getOriginalDimensions() ) {
return null;
}
return this.getCurrentDimensions().width / this.getOriginalDimensions().width;
};
/**
* Check if current dimensions are smaller than minimum dimensions in either direction
*
* Only possible if enforceMin is false.
*
* @return {boolean} Current dimensions are greater than maximum dimensions
*/
ve.dm.Scalable.prototype.isTooSmall = function () {
return !!( this.getCurrentDimensions() && this.getMinDimensions() &&
(
this.getCurrentDimensions().width < this.getMinDimensions().width ||
this.getCurrentDimensions().height < this.getMinDimensions().height
)
);
};
/**
* Check if current dimensions are greater than maximum dimensions in either direction
*
* Only possible if enforceMax is false.
*
* @return {boolean} Current dimensions are greater than maximum dimensions
*/
ve.dm.Scalable.prototype.isTooLarge = function () {
return !!( this.getCurrentDimensions() && this.getMaxDimensions() &&
(
this.getCurrentDimensions().width > this.getMaxDimensions().width ||
this.getCurrentDimensions().height > this.getMaxDimensions().height
)
);
};
/**
* Get a set of dimensions bounded by current restrictions, from specified dimensions
*
* @param {Object} dimensions Dimensions object with width & height
* @param {number} [grid] Optional grid size to snap to
* @return {Object} Dimensions object with width & height
*/
ve.dm.Scalable.prototype.getBoundedDimensions = function ( dimensions, grid ) {
var minDimensions = this.isEnforcedMin() && this.getMinDimensions(),
maxDimensions = this.isEnforcedMax() && this.getMaxDimensions();
dimensions = ve.copy( dimensions );
// Bound to min/max
if ( minDimensions ) {
dimensions.width = Math.max( dimensions.width, this.minDimensions.width );
dimensions.height = Math.max( dimensions.height, this.minDimensions.height );
}
if ( maxDimensions ) {
dimensions.width = Math.min( dimensions.width, this.maxDimensions.width );
dimensions.height = Math.min( dimensions.height, this.maxDimensions.height );
}
// Bound to ratio
if ( this.isFixedRatio() ) {
var ratio = dimensions.width / dimensions.height;
if ( ratio < this.getRatio() ) {
dimensions.height = Math.round( dimensions.width / this.getRatio() );
} else {
dimensions.width = Math.round( dimensions.height * this.getRatio() );
}
}
// Snap to grid
if ( grid ) {
var snapMin = minDimensions ? Math.ceil( minDimensions.width / grid ) : -Infinity;
var snapMax = maxDimensions ? Math.floor( maxDimensions.width / grid ) : Infinity;
var snap = Math.round( dimensions.width / grid );
dimensions.width = Math.max( Math.min( snap, snapMax ), snapMin ) * grid;
if ( this.isFixedRatio() ) {
// If the ratio is fixed we can't snap both to the grid, so just snap the width
dimensions.height = Math.round( dimensions.width / this.getRatio() );
} else {
snapMin = minDimensions ? Math.ceil( minDimensions.height / grid ) : -Infinity;
snapMax = maxDimensions ? Math.floor( maxDimensions.height / grid ) : Infinity;
snap = Math.round( dimensions.height / grid );
dimensions.height = Math.max( Math.min( snap, snapMax ), snapMin ) * grid;
}
}
return dimensions;
};
/**
* Checks whether the current dimensions are numeric and within range
*
* @return {boolean} Current dimensions are valid
*/
ve.dm.Scalable.prototype.isCurrentDimensionsValid = function () {
var dimensions = this.getCurrentDimensions(),
minDimensions = this.isEnforcedMin() && !ve.isEmptyObject( this.getMinDimensions() ) && this.getMinDimensions(),
maxDimensions = this.isEnforcedMax() && !ve.isEmptyObject( this.getMaxDimensions() ) && this.getMaxDimensions();
this.valid = (
!!dimensions &&
// Dimensions must be non-zero
+dimensions.width &&
+dimensions.height &&
(
!minDimensions || (
dimensions.width >= minDimensions.width &&
dimensions.height >= minDimensions.height
)
) &&
(
!maxDimensions || (
dimensions.width <= maxDimensions.width &&
dimensions.height <= maxDimensions.height
)
)
);
return this.valid;
};
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