fabric-pure-browser
Version:
Fabric.js package with no node-specific dependencies (node-canvas, jsdom). The project is published once a day (in case if a new version appears) from 'master' branch of https://github.com/fabricjs/fabric.js repository. You can keep original imports in
325 lines (301 loc) • 10.9 kB
JavaScript
(function() {
fabric.util.object.extend(fabric.Text.prototype, /** @lends fabric.Text.prototype */ {
/**
* Returns true if object has no styling or no styling in a line
* @param {Number} lineIndex , lineIndex is on wrapped lines.
* @return {Boolean}
*/
isEmptyStyles: function(lineIndex) {
if (!this.styles) {
return true;
}
if (typeof lineIndex !== 'undefined' && !this.styles[lineIndex]) {
return true;
}
var obj = typeof lineIndex === 'undefined' ? this.styles : { line: this.styles[lineIndex] };
for (var p1 in obj) {
for (var p2 in obj[p1]) {
// eslint-disable-next-line no-unused-vars
for (var p3 in obj[p1][p2]) {
return false;
}
}
}
return true;
},
/**
* Returns true if object has a style property or has it ina specified line
* This function is used to detect if a text will use a particular property or not.
* @param {String} property to check for
* @param {Number} lineIndex to check the style on
* @return {Boolean}
*/
styleHas: function(property, lineIndex) {
if (!this.styles || !property || property === '') {
return false;
}
if (typeof lineIndex !== 'undefined' && !this.styles[lineIndex]) {
return false;
}
var obj = typeof lineIndex === 'undefined' ? this.styles : { 0: this.styles[lineIndex] };
// eslint-disable-next-line
for (var p1 in obj) {
// eslint-disable-next-line
for (var p2 in obj[p1]) {
if (typeof obj[p1][p2][property] !== 'undefined') {
return true;
}
}
}
return false;
},
/**
* Check if characters in a text have a value for a property
* whose value matches the textbox's value for that property. If so,
* the character-level property is deleted. If the character
* has no other properties, then it is also deleted. Finally,
* if the line containing that character has no other characters
* then it also is deleted.
*
* @param {string} property The property to compare between characters and text.
*/
cleanStyle: function(property) {
if (!this.styles || !property || property === '') {
return false;
}
var obj = this.styles, stylesCount = 0, letterCount, stylePropertyValue,
allStyleObjectPropertiesMatch = true, graphemeCount = 0, styleObject;
// eslint-disable-next-line
for (var p1 in obj) {
letterCount = 0;
// eslint-disable-next-line
for (var p2 in obj[p1]) {
var styleObject = obj[p1][p2],
stylePropertyHasBeenSet = styleObject.hasOwnProperty(property);
stylesCount++;
if (stylePropertyHasBeenSet) {
if (!stylePropertyValue) {
stylePropertyValue = styleObject[property];
}
else if (styleObject[property] !== stylePropertyValue) {
allStyleObjectPropertiesMatch = false;
}
if (styleObject[property] === this[property]) {
delete styleObject[property];
}
}
else {
allStyleObjectPropertiesMatch = false;
}
if (Object.keys(styleObject).length !== 0) {
letterCount++;
}
else {
delete obj[p1][p2];
}
}
if (letterCount === 0) {
delete obj[p1];
}
}
// if every grapheme has the same style set then
// delete those styles and set it on the parent
for (var i = 0; i < this._textLines.length; i++) {
graphemeCount += this._textLines[i].length;
}
if (allStyleObjectPropertiesMatch && stylesCount === graphemeCount) {
this[property] = stylePropertyValue;
this.removeStyle(property);
}
},
/**
* Remove a style property or properties from all individual character styles
* in a text object. Deletes the character style object if it contains no other style
* props. Deletes a line style object if it contains no other character styles.
*
* @param {String} props The property to remove from character styles.
*/
removeStyle: function(property) {
if (!this.styles || !property || property === '') {
return;
}
var obj = this.styles, line, lineNum, charNum;
for (lineNum in obj) {
line = obj[lineNum];
for (charNum in line) {
delete line[charNum][property];
if (Object.keys(line[charNum]).length === 0) {
delete line[charNum];
}
}
if (Object.keys(line).length === 0) {
delete obj[lineNum];
}
}
},
/**
* @private
*/
_extendStyles: function(index, styles) {
var loc = this.get2DCursorLocation(index);
if (!this._getLineStyle(loc.lineIndex)) {
this._setLineStyle(loc.lineIndex);
}
if (!this._getStyleDeclaration(loc.lineIndex, loc.charIndex)) {
this._setStyleDeclaration(loc.lineIndex, loc.charIndex, {});
}
fabric.util.object.extend(this._getStyleDeclaration(loc.lineIndex, loc.charIndex), styles);
},
/**
* Returns 2d representation (lineIndex and charIndex) of cursor (or selection start)
* @param {Number} [selectionStart] Optional index. When not given, current selectionStart is used.
* @param {Boolean} [skipWrapping] consider the location for unwrapped lines. usefull to manage styles.
*/
get2DCursorLocation: function(selectionStart, skipWrapping) {
if (typeof selectionStart === 'undefined') {
selectionStart = this.selectionStart;
}
var lines = skipWrapping ? this._unwrappedTextLines : this._textLines,
len = lines.length;
for (var i = 0; i < len; i++) {
if (selectionStart <= lines[i].length) {
return {
lineIndex: i,
charIndex: selectionStart
};
}
selectionStart -= lines[i].length + this.missingNewlineOffset(i);
}
return {
lineIndex: i - 1,
charIndex: lines[i - 1].length < selectionStart ? lines[i - 1].length : selectionStart
};
},
/**
* Gets style of a current selection/cursor (at the start position)
* if startIndex or endIndex are not provided, slectionStart or selectionEnd will be used.
* @param {Number} [startIndex] Start index to get styles at
* @param {Number} [endIndex] End index to get styles at, if not specified selectionEnd or startIndex + 1
* @param {Boolean} [complete] get full style or not
* @return {Array} styles an array with one, zero or more Style objects
*/
getSelectionStyles: function(startIndex, endIndex, complete) {
if (typeof startIndex === 'undefined') {
startIndex = this.selectionStart || 0;
}
if (typeof endIndex === 'undefined') {
endIndex = this.selectionEnd || startIndex;
}
var styles = [];
for (var i = startIndex; i < endIndex; i++) {
styles.push(this.getStyleAtPosition(i, complete));
}
return styles;
},
/**
* Gets style of a current selection/cursor position
* @param {Number} position to get styles at
* @param {Boolean} [complete] full style if true
* @return {Object} style Style object at a specified index
* @private
*/
getStyleAtPosition: function(position, complete) {
var loc = this.get2DCursorLocation(position),
style = complete ? this.getCompleteStyleDeclaration(loc.lineIndex, loc.charIndex) :
this._getStyleDeclaration(loc.lineIndex, loc.charIndex);
return style || {};
},
/**
* Sets style of a current selection, if no selection exist, do not set anything.
* @param {Object} [styles] Styles object
* @param {Number} [startIndex] Start index to get styles at
* @param {Number} [endIndex] End index to get styles at, if not specified selectionEnd or startIndex + 1
* @return {fabric.IText} thisArg
* @chainable
*/
setSelectionStyles: function(styles, startIndex, endIndex) {
if (typeof startIndex === 'undefined') {
startIndex = this.selectionStart || 0;
}
if (typeof endIndex === 'undefined') {
endIndex = this.selectionEnd || startIndex;
}
for (var i = startIndex; i < endIndex; i++) {
this._extendStyles(i, styles);
}
/* not included in _extendStyles to avoid clearing cache more than once */
this._forceClearCache = true;
return this;
},
/**
* get the reference, not a clone, of the style object for a given character
* @param {Number} lineIndex
* @param {Number} charIndex
* @return {Object} style object
*/
_getStyleDeclaration: function(lineIndex, charIndex) {
var lineStyle = this.styles && this.styles[lineIndex];
if (!lineStyle) {
return null;
}
return lineStyle[charIndex];
},
/**
* return a new object that contains all the style property for a character
* the object returned is newly created
* @param {Number} lineIndex of the line where the character is
* @param {Number} charIndex position of the character on the line
* @return {Object} style object
*/
getCompleteStyleDeclaration: function(lineIndex, charIndex) {
var style = this._getStyleDeclaration(lineIndex, charIndex) || { },
styleObject = { }, prop;
for (var i = 0; i < this._styleProperties.length; i++) {
prop = this._styleProperties[i];
styleObject[prop] = typeof style[prop] === 'undefined' ? this[prop] : style[prop];
}
return styleObject;
},
/**
* @param {Number} lineIndex
* @param {Number} charIndex
* @param {Object} style
* @private
*/
_setStyleDeclaration: function(lineIndex, charIndex, style) {
this.styles[lineIndex][charIndex] = style;
},
/**
*
* @param {Number} lineIndex
* @param {Number} charIndex
* @private
*/
_deleteStyleDeclaration: function(lineIndex, charIndex) {
delete this.styles[lineIndex][charIndex];
},
/**
* @param {Number} lineIndex
* @return {Boolean} if the line exists or not
* @private
*/
_getLineStyle: function(lineIndex) {
return !!this.styles[lineIndex];
},
/**
* Set the line style to an empty object so that is initialized
* @param {Number} lineIndex
* @private
*/
_setLineStyle: function(lineIndex) {
this.styles[lineIndex] = {};
},
/**
* @param {Number} lineIndex
* @private
*/
_deleteLineStyle: function(lineIndex) {
delete this.styles[lineIndex];
}
});
})();