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1232 lines
36 KiB
1232 lines
36 KiB
let util = require('../../../../util');
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let ComponentUtil = require('./ComponentUtil').default;
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/**
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* Callback to determine text dimensions, using the parent label settings.
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* @callback MeasureText
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* @param {text} text
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* @returns {number}
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*/
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/**
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* Internal helper class used for splitting a label text into lines.
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*
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* This has been moved away from the label processing code for better undestanding upon reading.
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*
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* @private
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*/
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class LabelAccumulator {
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/**
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* @param {MeasureText} measureText
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*/
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constructor(measureText) {
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this.measureText = measureText;
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this.current = 0;
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this.width = 0;
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this.height = 0;
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this.lines = [];
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}
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/**
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* Append given text to the given line.
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*
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* @param {number} l index of line to add to
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* @param {string} text string to append to line
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* @param {'bold'|'ital'|'boldital'|'mono'|'normal'} [mod='normal']
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* @private
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*/
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_add(l, text, mod = 'normal') {
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if (text === undefined || text === "") return;
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if (this.lines[l] === undefined) {
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this.lines[l] = {
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width : 0,
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height: 0,
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blocks: []
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};
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}
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// Determine width and get the font properties
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let result = this.measureText(text, mod);
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let block = Object.assign({}, result.values);
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block.text = text;
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block.width = result.width;
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block.mod = mod;
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this.lines[l].blocks.push(block);
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// Update the line width. We need this for
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// determining if a string goes over max width
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this.lines[l].width += result.width;
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}
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/**
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* Returns the width in pixels of the current line.
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*
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* @returns {number}
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*/
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curWidth() {
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let line = this.lines[this.current];
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if (line === undefined) return 0;
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return line.width;
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}
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/**
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* Add text in block to current line
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*
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* @param {string} text
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* @param {'bold'|'ital'|'boldital'|'mono'|'normal'} [mod='normal']
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*/
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append(text, mod = 'normal') {
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this._add(this.current, text, mod);
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}
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/**
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* Add text in block to current line and start a new line
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*
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* @param {string} text
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* @param {'bold'|'ital'|'boldital'|'mono'|'normal'} [mod='normal']
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*/
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newLine(text, mod = 'normal') {
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this._add(this.current, text, mod);
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this.current++;
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}
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/**
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* Set the sizes for all lines and the whole thing.
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*
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* @returns {{width: (number|*), height: (number|*), lines: Array}}
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*/
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finalize() {
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// console.log(JSON.stringify(this.lines, null, 2));
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// Determine the heights of the lines
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// Note that width has already been set
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for (let k = 0; k < this.lines.length; k++) {
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let line = this.lines[k];
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// Looking for max height of blocks in line
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let height = 0;
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for (let l = 0; l < line.blocks.length; l++) {
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let block = line.blocks[l];
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if (height < block.height) {
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height = block.height;
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}
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}
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line.height = height;
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}
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// Determine the full label size
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let width = 0;
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let height = 0;
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for (let k = 0; k < this.lines.length; k++) {
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let line = this.lines[k];
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if (line.width > width) {
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width = line.width;
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}
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height += line.height;
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}
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this.width = width;
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this.height = height;
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// Return a simple hash object for further processing.
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return {
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width : this.width,
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height: this.height,
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lines : this.lines
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}
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}
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}
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/**
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* A Label to be used for Nodes or Edges.
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*/
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class Label {
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/**
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* @param {Object} body
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* @param {Object} options
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* @param {boolean} [edgelabel=false]
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*/
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constructor(body, options, edgelabel = false) {
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this.body = body;
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this.pointToSelf = false;
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this.baseSize = undefined;
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this.fontOptions = {};
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this.setOptions(options);
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this.size = {top: 0, left: 0, width: 0, height: 0, yLine: 0}; // could be cached
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this.isEdgeLabel = edgelabel;
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}
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/**
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*
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* @param {Object} options
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* @param {boolean} [allowDeletion=false]
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*/
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setOptions(options, allowDeletion = false) {
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this.elementOptions = options;
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// We want to keep the font options separated from the node options.
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// The node options have to mirror the globals when they are not overruled.
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this.fontOptions = util.deepExtend({},options.font, true);
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if (options.label !== undefined) {
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this.labelDirty = true;
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}
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if (options.font !== undefined) {
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Label.parseOptions(this.fontOptions, options, allowDeletion);
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if (typeof options.font === 'string') {
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this.baseSize = this.fontOptions.size;
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}
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else if (typeof options.font === 'object') {
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if (options.font.size !== undefined) {
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this.baseSize = options.font.size;
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}
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}
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}
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}
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/**
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*
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* @param {Object} parentOptions
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* @param {Object} newOptions
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* @param {boolean} [allowDeletion=false]
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* @static
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*/
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static parseOptions(parentOptions, newOptions, allowDeletion = false) {
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if (Label.parseFontString(parentOptions, newOptions.font)) {
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parentOptions.vadjust = 0;
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}
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else if (typeof newOptions.font === 'object') {
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util.fillIfDefined(parentOptions, newOptions.font, allowDeletion);
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}
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parentOptions.size = Number(parentOptions.size);
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parentOptions.vadjust = Number(parentOptions.vadjust);
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}
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/**
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* If in-variable is a string, parse it as a font specifier.
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*
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* Note that following is not done here and have to be done after the call:
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* - No number conversion (size)
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* - Not all font options are set (vadjust, mod)
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*
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* @param {Object} outOptions out-parameter, object in which to store the parse results (if any)
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* @param {Object} inOptions font options to parse
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* @return {boolean} true if font parsed as string, false otherwise
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* @static
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*/
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static parseFontString(outOptions, inOptions) {
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if (!inOptions || typeof inOptions !== 'string') return false;
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let newOptionsArray = inOptions.split(" ");
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outOptions.size = newOptionsArray[0].replace("px",'');
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outOptions.face = newOptionsArray[1];
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outOptions.color = newOptionsArray[2];
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return true;
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}
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/**
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* Set the width and height constraints based on 'nearest' value
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* @param {Array} pile array of option objects to consider
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* @private
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*/
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constrain(pile) {
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this.fontOptions.constrainWidth = false;
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this.fontOptions.maxWdt = -1;
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this.fontOptions.minWdt = -1;
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let widthConstraint = util.topMost(pile, 'widthConstraint');
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if (typeof widthConstraint === 'number') {
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this.fontOptions.maxWdt = Number(widthConstraint);
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this.fontOptions.minWdt = Number(widthConstraint);
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} else if (typeof widthConstraint === 'object') {
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let widthConstraintMaximum = util.topMost(pile, ['widthConstraint', 'maximum']);
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if (typeof widthConstraintMaximum === 'number') {
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this.fontOptions.maxWdt = Number(widthConstraintMaximum);
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}
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let widthConstraintMinimum = util.topMost(pile, ['widthConstraint', 'minimum'])
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if (typeof widthConstraintMinimum === 'number') {
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this.fontOptions.minWdt = Number(widthConstraintMinimum);
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}
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}
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this.fontOptions.constrainHeight = false;
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this.fontOptions.minHgt = -1;
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this.fontOptions.valign = 'middle';
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let heightConstraint = util.topMost(pile, 'heightConstraint');
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if (typeof heightConstraint === 'number') {
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this.fontOptions.minHgt = Number(heightConstraint);
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} else if (typeof heightConstraint === 'object') {
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let heightConstraintMinimum = util.topMost(pile, ['heightConstraint', 'minimum']);
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if (typeof heightConstraintMinimum === 'number') {
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this.fontOptions.minHgt = Number(heightConstraintMinimum);
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}
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let heightConstraintValign = util.topMost(pile, ['heightConstraint', 'valign']);
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if (typeof heightConstraintValign === 'string') {
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if ((heightConstraintValign === 'top')||(heightConstraintValign === 'bottom')) {
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this.fontOptions.valign = heightConstraintValign;
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}
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}
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}
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}
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/**
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* Set options and update internal state
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*
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* @param {Object} options options to set
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* @param {Array} pile array of option objects to consider for option 'chosen'
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*/
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update(options, pile) {
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this.setOptions(options, true);
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this.constrain(pile);
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this.fontOptions.chooser = ComponentUtil.choosify('label', pile);
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}
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/**
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* When margins are set in an element, adjust sizes is called to remove them
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* from the width/height constraints. This must be done prior to label sizing.
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*
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* @param {{top: number, right: number, bottom: number, left: number}} margins
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*/
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adjustSizes(margins) {
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let widthBias = (margins) ? (margins.right + margins.left) : 0;
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if (this.fontOptions.constrainWidth) {
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this.fontOptions.maxWdt -= widthBias;
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this.fontOptions.minWdt -= widthBias;
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}
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let heightBias = (margins) ? (margins.top + margins.bottom) : 0;
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if (this.fontOptions.constrainHeight) {
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this.fontOptions.minHgt -= heightBias;
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}
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}
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/**
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* Collapse the font options for the multi-font to single objects, from
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* the chain of option objects passed.
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*
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* If an option for a specific multi-font is not present, the parent
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* option is checked for the given option.
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*
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* NOTE: naming of 'groupOptions' is a misnomer; the actual value passed
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* is the new values to set from setOptions().
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*
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* @param {Object} options
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* @param {Object} groupOptions
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* @param {Object} defaultOptions
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*/
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propagateFonts(options, groupOptions, defaultOptions) {
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if (!this.fontOptions.multi) return;
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/**
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* Resolve the font options path.
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* If valid, return a reference to the object in question.
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* Otherwise, just return null.
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*
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* @param {Object} options base object to determine path from
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* @param {'bold'|'ital'|'boldital'|'mono'|'normal'} [mod=undefined] if present, sub path for the mod-font
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* @returns {Object|null}
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*/
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var pathP = function(options, mod) {
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if (!options || !options.font) return null;
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var opt = options.font;
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if (mod) {
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if (!opt[mod]) return null;
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opt = opt[mod];
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}
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return opt;
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};
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/**
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* Get property value from options.font[mod][property] if present.
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* If mod not passed, use property value from options.font[property].
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*
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* @param {Label.options} options
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* @param {'bold'|'ital'|'boldital'|'mono'|'normal'} mod
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* @param {string} property
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* @return {*|null} value if found, null otherwise.
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*/
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var getP = function(options, mod, property) {
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let opt = pathP(options, mod);
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if (opt && opt.hasOwnProperty(property)) {
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return opt[property];
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}
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return null;
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};
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let mods = [ 'bold', 'ital', 'boldital', 'mono' ];
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for (const mod of mods) {
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let modOptions = this.fontOptions[mod];
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let modDefaults = defaultOptions.font[mod];
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if (Label.parseFontString(modOptions, pathP(options, mod))) {
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modOptions.vadjust = this.fontOptions.vadjust;
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modOptions.mod = modDefaults.mod;
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} else {
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// We need to be crafty about loading the modded fonts. We want as
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// much 'natural' versatility as we can get, so a simple global
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// change propagates in an expected way, even if not stictly logical.
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// 'face' has a special exception for mono, since we probably
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// don't want to sync to the base font face.
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modOptions.face =
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getP(options , mod, 'face') ||
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getP(groupOptions, mod, 'face') ||
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(mod === 'mono'? modDefaults.face:null ) ||
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getP(groupOptions, null, 'face') ||
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this.fontOptions.face
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;
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// 'color' follows the standard flow
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modOptions.color =
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getP(options , mod, 'color') ||
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getP(groupOptions, mod, 'color') ||
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getP(groupOptions, null, 'color') ||
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this.fontOptions.color
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;
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// 'mode' follows the standard flow
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modOptions.mod =
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getP(options , mod, 'mod') ||
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getP(groupOptions, mod, 'mod') ||
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getP(groupOptions, null, 'mod') ||
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modDefaults.mod
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;
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// It's important that we size up defaults similarly if we're
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// using default faces unless overriden. We want to preserve the
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// ratios closely - but if faces have changed, all bets are off.
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let ratio;
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// NOTE: Following condition always fails, because modDefaults
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// has no explicit font property. This is deliberate, see
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// var's 'NodesHandler.defaultOptions.font[mod]'.
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// However, I want to keep the original logic while refactoring;
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// it appears to be working fine even if ratio is never set.
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// TODO: examine if this is a bug, fix if necessary.
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//
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if ((modOptions.face === modDefaults.face) &&
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(this.fontOptions.face === defaultOptions.font.face)) {
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ratio = this.fontOptions.size / Number(defaultOptions.font.size);
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}
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modOptions.size =
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getP(options , mod, 'size') ||
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getP(groupOptions, mod, 'size') ||
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(ratio? modDefaults.size * ratio: null) || // Scale the mod size using the same ratio
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getP(groupOptions, null, 'size') ||
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this.fontOptions.size
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;
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modOptions.vadjust =
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getP(options , mod, 'vadjust') ||
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getP(groupOptions, mod, 'vadjust') ||
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(ratio? modDefaults.vadjust * Math.round(ratio): null) || // Scale it using the same ratio
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this.fontOptions.vadjust
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;
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}
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modOptions.size = Number(modOptions.size);
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modOptions.vadjust = Number(modOptions.vadjust);
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}
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}
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/**
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* Main function. This is called from anything that wants to draw a label.
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* @param {CanvasRenderingContext2D} ctx
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* @param {number} x
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* @param {number} y
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* @param {boolean} selected
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* @param {boolean} hover
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* @param {string} [baseline='middle']
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*/
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draw(ctx, x, y, selected, hover, baseline = 'middle') {
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// if no label, return
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if (this.elementOptions.label === undefined)
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return;
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// check if we have to render the label
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let viewFontSize = this.fontOptions.size * this.body.view.scale;
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if (this.elementOptions.label && viewFontSize < this.elementOptions.scaling.label.drawThreshold - 1)
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return;
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// update the size cache if required
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this.calculateLabelSize(ctx, selected, hover, x, y, baseline);
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// create the fontfill background
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this._drawBackground(ctx);
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// draw text
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this._drawText(ctx, selected, hover, x, y, baseline);
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}
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/**
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* Draws the label background
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* @param {CanvasRenderingContext2D} ctx
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* @private
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*/
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_drawBackground(ctx) {
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if (this.fontOptions.background !== undefined && this.fontOptions.background !== "none") {
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ctx.fillStyle = this.fontOptions.background;
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let lineMargin = 2;
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if (this.isEdgeLabel) {
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switch (this.fontOptions.align) {
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case 'middle':
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ctx.fillRect(-this.size.width * 0.5, -this.size.height * 0.5, this.size.width, this.size.height);
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break;
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case 'top':
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ctx.fillRect(-this.size.width * 0.5, -(this.size.height + lineMargin), this.size.width, this.size.height);
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break;
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case 'bottom':
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ctx.fillRect(-this.size.width * 0.5, lineMargin, this.size.width, this.size.height);
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break;
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default:
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ctx.fillRect(this.size.left, this.size.top - 0.5*lineMargin, this.size.width, this.size.height);
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break;
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}
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} else {
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ctx.fillRect(this.size.left, this.size.top - 0.5*lineMargin, this.size.width, this.size.height);
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}
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}
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}
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/**
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*
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* @param {CanvasRenderingContext2D} ctx
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* @param {boolean} selected
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* @param {boolean} hover
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* @param {number} x
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* @param {number} y
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* @param {string} [baseline='middle']
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* @private
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*/
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_drawText(ctx, selected, hover, x, y, baseline = 'middle') {
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let fontSize = this.fontOptions.size;
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let viewFontSize = fontSize * this.body.view.scale;
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// this ensures that there will not be HUGE letters on screen by setting an upper limit on the visible text size (regardless of zoomLevel)
|
|
if (viewFontSize >= this.elementOptions.scaling.label.maxVisible) {
|
|
// TODO: Does this actually do anything?
|
|
fontSize = Number(this.elementOptions.scaling.label.maxVisible) / this.body.view.scale;
|
|
}
|
|
|
|
let yLine = this.size.yLine;
|
|
[x, yLine] = this._setAlignment(ctx, x, yLine, baseline);
|
|
|
|
ctx.textAlign = 'left';
|
|
x = x - this.size.width / 2; // Shift label 1/2-distance to the left
|
|
if ((this.fontOptions.valign) && (this.size.height > this.size.labelHeight)) {
|
|
if (this.fontOptions.valign === 'top') {
|
|
yLine -= (this.size.height - this.size.labelHeight) / 2;
|
|
}
|
|
if (this.fontOptions.valign === 'bottom') {
|
|
yLine += (this.size.height - this.size.labelHeight) / 2;
|
|
}
|
|
}
|
|
|
|
// draw the text
|
|
for (let i = 0; i < this.lineCount; i++) {
|
|
if (this.lines[i] && this.lines[i].blocks) {
|
|
let width = 0;
|
|
if (this.isEdgeLabel || this.fontOptions.align === 'center') {
|
|
width += (this.size.width - this.lines[i].width) / 2
|
|
} else if (this.fontOptions.align === 'right') {
|
|
width += (this.size.width - this.lines[i].width)
|
|
}
|
|
for (let j = 0; j < this.lines[i].blocks.length; j++) {
|
|
let block = this.lines[i].blocks[j];
|
|
ctx.font = block.font;
|
|
let [fontColor, strokeColor] = this._getColor(block.color, viewFontSize, block.strokeColor);
|
|
if (block.strokeWidth > 0) {
|
|
ctx.lineWidth = block.strokeWidth;
|
|
ctx.strokeStyle = strokeColor;
|
|
ctx.lineJoin = 'round';
|
|
}
|
|
ctx.fillStyle = fontColor;
|
|
|
|
if (block.strokeWidth > 0) {
|
|
ctx.strokeText(block.text, x + width, yLine + block.vadjust);
|
|
}
|
|
ctx.fillText(block.text, x + width, yLine + block.vadjust);
|
|
width += block.width;
|
|
}
|
|
yLine += this.lines[i].height;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param {CanvasRenderingContext2D} ctx
|
|
* @param {number} x
|
|
* @param {number} yLine
|
|
* @param {string} baseline
|
|
* @returns {Array.<number>}
|
|
* @private
|
|
*/
|
|
_setAlignment(ctx, x, yLine, baseline) {
|
|
// check for label alignment (for edges)
|
|
// TODO: make alignment for nodes
|
|
if (this.isEdgeLabel && this.fontOptions.align !== 'horizontal' && this.pointToSelf === false) {
|
|
x = 0;
|
|
yLine = 0;
|
|
|
|
let lineMargin = 2;
|
|
if (this.fontOptions.align === 'top') {
|
|
ctx.textBaseline = 'alphabetic';
|
|
yLine -= 2 * lineMargin; // distance from edge, required because we use alphabetic. Alphabetic has less difference between browsers
|
|
}
|
|
else if (this.fontOptions.align === 'bottom') {
|
|
ctx.textBaseline = 'hanging';
|
|
yLine += 2 * lineMargin;// distance from edge, required because we use hanging. Hanging has less difference between browsers
|
|
}
|
|
else {
|
|
ctx.textBaseline = 'middle';
|
|
}
|
|
}
|
|
else {
|
|
ctx.textBaseline = baseline;
|
|
}
|
|
return [x,yLine];
|
|
}
|
|
|
|
/**
|
|
* fade in when relative scale is between threshold and threshold - 1.
|
|
* If the relative scale would be smaller than threshold -1 the draw function would have returned before coming here.
|
|
*
|
|
* @param {string} color The font color to use
|
|
* @param {number} viewFontSize
|
|
* @param {string} initialStrokeColor
|
|
* @returns {Array.<string>} An array containing the font color and stroke color
|
|
* @private
|
|
*/
|
|
_getColor(color, viewFontSize, initialStrokeColor) {
|
|
let fontColor = color || '#000000';
|
|
let strokeColor = initialStrokeColor || '#ffffff';
|
|
if (viewFontSize <= this.elementOptions.scaling.label.drawThreshold) {
|
|
let opacity = Math.max(0, Math.min(1, 1 - (this.elementOptions.scaling.label.drawThreshold - viewFontSize)));
|
|
fontColor = util.overrideOpacity(fontColor, opacity);
|
|
strokeColor = util.overrideOpacity(strokeColor, opacity);
|
|
}
|
|
return [fontColor, strokeColor];
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param {CanvasRenderingContext2D} ctx
|
|
* @param {boolean} selected
|
|
* @param {boolean} hover
|
|
* @returns {{width: number, height: number}}
|
|
*/
|
|
getTextSize(ctx, selected = false, hover = false) {
|
|
this._processLabel(ctx, selected, hover);
|
|
return {
|
|
width: this.size.width,
|
|
height: this.size.height,
|
|
lineCount: this.lineCount
|
|
};
|
|
}
|
|
|
|
|
|
/**
|
|
*
|
|
* @param {CanvasRenderingContext2D} ctx
|
|
* @param {boolean} selected
|
|
* @param {boolean} hover
|
|
* @param {number} [x=0]
|
|
* @param {number} [y=0]
|
|
* @param {'middle'|'hanging'} [baseline='middle']
|
|
*/
|
|
calculateLabelSize(ctx, selected, hover, x = 0, y = 0, baseline = 'middle') {
|
|
if (this.labelDirty === true) {
|
|
this._processLabel(ctx, selected, hover);
|
|
}
|
|
this.size.left = x - this.size.width * 0.5;
|
|
this.size.top = y - this.size.height * 0.5;
|
|
this.size.yLine = y + (1 - this.lineCount) * 0.5 * this.fontOptions.size;
|
|
if (baseline === "hanging") {
|
|
this.size.top += 0.5 * this.fontOptions.size;
|
|
this.size.top += 4; // distance from node, required because we use hanging. Hanging has less difference between browsers
|
|
this.size.yLine += 4; // distance from node
|
|
}
|
|
this.labelDirty = false;
|
|
}
|
|
|
|
/**
|
|
* normalize the markup system
|
|
*
|
|
* @param {boolean|'md'|'markdown'|'html'} markupSystem
|
|
* @returns {string}
|
|
*/
|
|
decodeMarkupSystem(markupSystem) {
|
|
let system = 'none';
|
|
if (markupSystem === 'markdown' || markupSystem === 'md') {
|
|
system = 'markdown';
|
|
} else if (markupSystem === true || markupSystem === 'html') {
|
|
system = 'html'
|
|
}
|
|
return system;
|
|
}
|
|
|
|
/**
|
|
* Explodes a piece of text into single-font blocks using a given markup
|
|
* @param {string} text
|
|
* @param {boolean|'md'|'markdown'|'html'} markupSystem
|
|
* @returns {Array.<{text: string, mod: string}>}
|
|
*/
|
|
splitBlocks(text, markupSystem) {
|
|
let system = this.decodeMarkupSystem(markupSystem);
|
|
if (system === 'none') {
|
|
return [{
|
|
text: text,
|
|
mod: 'normal'
|
|
}]
|
|
} else if (system === 'markdown') {
|
|
return this.splitMarkdownBlocks(text);
|
|
} else if (system === 'html') {
|
|
return this.splitHtmlBlocks(text);
|
|
}
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param {string} text
|
|
* @returns {Array}
|
|
*/
|
|
splitMarkdownBlocks(text) {
|
|
let blocks = [];
|
|
let s = {
|
|
bold: false,
|
|
ital: false,
|
|
mono: false,
|
|
beginable: true,
|
|
spacing: false,
|
|
position: 0,
|
|
buffer: "",
|
|
modStack: []
|
|
};
|
|
s.mod = function() {
|
|
return (this.modStack.length === 0) ? 'normal' : this.modStack[0];
|
|
};
|
|
s.modName = function() {
|
|
if (this.modStack.length === 0)
|
|
return 'normal';
|
|
else if (this.modStack[0] === 'mono')
|
|
return 'mono';
|
|
else {
|
|
if (s.bold && s.ital) {
|
|
return 'boldital';
|
|
} else if (s.bold) {
|
|
return 'bold';
|
|
} else if (s.ital) {
|
|
return 'ital';
|
|
}
|
|
}
|
|
};
|
|
s.emitBlock = function(override=false) { // eslint-disable-line no-unused-vars
|
|
if (this.spacing) {
|
|
this.add(" ");
|
|
this.spacing = false;
|
|
}
|
|
if (this.buffer.length > 0) {
|
|
blocks.push({ text: this.buffer, mod: this.modName() });
|
|
this.buffer = "";
|
|
}
|
|
};
|
|
s.add = function(text) {
|
|
if (text === " ") {
|
|
s.spacing = true;
|
|
}
|
|
if (s.spacing) {
|
|
this.buffer += " ";
|
|
this.spacing = false;
|
|
}
|
|
if (text != " ") {
|
|
this.buffer += text;
|
|
}
|
|
};
|
|
while (s.position < text.length) {
|
|
let ch = text.charAt(s.position);
|
|
if (/[ \t]/.test(ch)) {
|
|
if (!s.mono) {
|
|
s.spacing = true;
|
|
} else {
|
|
s.add(ch);
|
|
}
|
|
s.beginable = true
|
|
} else if (/\\/.test(ch)) {
|
|
if (s.position < text.length+1) {
|
|
s.position++;
|
|
ch = text.charAt(s.position);
|
|
if (/ \t/.test(ch)) {
|
|
s.spacing = true;
|
|
} else {
|
|
s.add(ch);
|
|
s.beginable = false;
|
|
}
|
|
}
|
|
} else if (!s.mono && !s.bold && (s.beginable || s.spacing) && /\*/.test(ch)) {
|
|
s.emitBlock();
|
|
s.bold = true;
|
|
s.modStack.unshift("bold");
|
|
} else if (!s.mono && !s.ital && (s.beginable || s.spacing) && /\_/.test(ch)) {
|
|
s.emitBlock();
|
|
s.ital = true;
|
|
s.modStack.unshift("ital");
|
|
} else if (!s.mono && (s.beginable || s.spacing) && /`/.test(ch)) {
|
|
s.emitBlock();
|
|
s.mono = true;
|
|
s.modStack.unshift("mono");
|
|
} else if (!s.mono && (s.mod() === "bold") && /\*/.test(ch)) {
|
|
if ((s.position === text.length-1) || /[.,_` \t\n]/.test(text.charAt(s.position+1))) {
|
|
s.emitBlock();
|
|
s.bold = false;
|
|
s.modStack.shift();
|
|
} else {
|
|
s.add(ch);
|
|
}
|
|
} else if (!s.mono && (s.mod() === "ital") && /\_/.test(ch)) {
|
|
if ((s.position === text.length-1) || /[.,*` \t\n]/.test(text.charAt(s.position+1))) {
|
|
s.emitBlock();
|
|
s.ital = false;
|
|
s.modStack.shift();
|
|
} else {
|
|
s.add(ch);
|
|
}
|
|
} else if (s.mono && (s.mod() === "mono") && /`/.test(ch)) {
|
|
if ((s.position === text.length-1) || (/[.,*_ \t\n]/.test(text.charAt(s.position+1)))) {
|
|
s.emitBlock();
|
|
s.mono = false;
|
|
s.modStack.shift();
|
|
} else {
|
|
s.add(ch);
|
|
}
|
|
} else {
|
|
s.add(ch);
|
|
s.beginable = false;
|
|
}
|
|
s.position++
|
|
}
|
|
s.emitBlock();
|
|
return blocks;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param {string} text
|
|
* @returns {Array}
|
|
*/
|
|
splitHtmlBlocks(text) {
|
|
let blocks = [];
|
|
let s = {
|
|
bold: false,
|
|
ital: false,
|
|
mono: false,
|
|
spacing: false,
|
|
position: 0,
|
|
buffer: "",
|
|
modStack: []
|
|
};
|
|
s.mod = function() {
|
|
return (this.modStack.length === 0) ? 'normal' : this.modStack[0];
|
|
};
|
|
s.modName = function() {
|
|
if (this.modStack.length === 0)
|
|
return 'normal';
|
|
else if (this.modStack[0] === 'mono')
|
|
return 'mono';
|
|
else {
|
|
if (s.bold && s.ital) {
|
|
return 'boldital';
|
|
} else if (s.bold) {
|
|
return 'bold';
|
|
} else if (s.ital) {
|
|
return 'ital';
|
|
}
|
|
}
|
|
};
|
|
s.emitBlock = function(override=false) { // eslint-disable-line no-unused-vars
|
|
if (this.spacing) {
|
|
this.add(" ");
|
|
this.spacing = false;
|
|
}
|
|
if (this.buffer.length > 0) {
|
|
blocks.push({ text: this.buffer, mod: this.modName() });
|
|
this.buffer = "";
|
|
}
|
|
};
|
|
s.add = function(text) {
|
|
if (text === " ") {
|
|
s.spacing = true;
|
|
}
|
|
if (s.spacing) {
|
|
this.buffer += " ";
|
|
this.spacing = false;
|
|
}
|
|
if (text != " ") {
|
|
this.buffer += text;
|
|
}
|
|
};
|
|
while (s.position < text.length) {
|
|
let ch = text.charAt(s.position);
|
|
if (/[ \t]/.test(ch)) {
|
|
if (!s.mono) {
|
|
s.spacing = true;
|
|
} else {
|
|
s.add(ch);
|
|
}
|
|
} else if (/</.test(ch)) {
|
|
if (!s.mono && !s.bold && /<b>/.test(text.substr(s.position,3))) {
|
|
s.emitBlock();
|
|
s.bold = true;
|
|
s.modStack.unshift("bold");
|
|
s.position += 2;
|
|
} else if (!s.mono && !s.ital && /<i>/.test(text.substr(s.position,3))) {
|
|
s.emitBlock();
|
|
s.ital = true;
|
|
s.modStack.unshift("ital");
|
|
s.position += 2;
|
|
} else if (!s.mono && /<code>/.test(text.substr(s.position,6))) {
|
|
s.emitBlock();
|
|
s.mono = true;
|
|
s.modStack.unshift("mono");
|
|
s.position += 5;
|
|
} else if (!s.mono && (s.mod() === 'bold') && /<\/b>/.test(text.substr(s.position,4))) {
|
|
s.emitBlock();
|
|
s.bold = false;
|
|
s.modStack.shift();
|
|
s.position += 3;
|
|
} else if (!s.mono && (s.mod() === 'ital') && /<\/i>/.test(text.substr(s.position,4))) {
|
|
s.emitBlock();
|
|
s.ital = false;
|
|
s.modStack.shift();
|
|
s.position += 3;
|
|
} else if ((s.mod() === 'mono') && /<\/code>/.test(text.substr(s.position,7))) {
|
|
s.emitBlock();
|
|
s.mono = false;
|
|
s.modStack.shift();
|
|
s.position += 6;
|
|
} else {
|
|
s.add(ch);
|
|
}
|
|
} else if (/&/.test(ch)) {
|
|
if (/</.test(text.substr(s.position,4))) {
|
|
s.add("<");
|
|
s.position += 3;
|
|
} else if (/&/.test(text.substr(s.position,5))) {
|
|
s.add("&");
|
|
s.position += 4;
|
|
} else {
|
|
s.add("&");
|
|
}
|
|
} else {
|
|
s.add(ch);
|
|
}
|
|
s.position++
|
|
}
|
|
s.emitBlock();
|
|
return blocks;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param {CanvasRenderingContext2D} ctx
|
|
* @param {boolean} selected
|
|
* @param {boolean} hover
|
|
* @param {string} mod
|
|
* @returns {{color, size, face, mod, vadjust, strokeWidth: *, strokeColor: (*|string|allOptions.edges.font.strokeColor|{string}|allOptions.nodes.font.strokeColor|Array)}}
|
|
*/
|
|
getFormattingValues(ctx, selected, hover, mod) {
|
|
var getValue = function(fontOptions, mod, option) {
|
|
if (mod === "normal") {
|
|
if (option === 'mod' ) return "";
|
|
return fontOptions[option];
|
|
}
|
|
|
|
if (fontOptions[mod][option]) {
|
|
return fontOptions[mod][option];
|
|
} else {
|
|
// Take from parent font option
|
|
return fontOptions[option];
|
|
}
|
|
};
|
|
|
|
let values = {
|
|
color : getValue(this.fontOptions, mod, 'color' ),
|
|
size : getValue(this.fontOptions, mod, 'size' ),
|
|
face : getValue(this.fontOptions, mod, 'face' ),
|
|
mod : getValue(this.fontOptions, mod, 'mod' ),
|
|
vadjust: getValue(this.fontOptions, mod, 'vadjust'),
|
|
strokeWidth: this.fontOptions.strokeWidth,
|
|
strokeColor: this.fontOptions.strokeColor
|
|
};
|
|
if (selected || hover) {
|
|
if (mod === "normal" && (this.fontOptions.chooser === true) && (this.elementOptions.labelHighlightBold)) {
|
|
values.mod = 'bold';
|
|
} else {
|
|
if (typeof this.fontOptions.chooser === 'function') {
|
|
this.fontOptions.chooser(values, this.elementOptions.id, selected, hover);
|
|
}
|
|
}
|
|
}
|
|
ctx.font = (values.mod + " " + values.size + "px " + values.face).replace(/"/g, "");
|
|
values.font = ctx.font;
|
|
values.height = values.size;
|
|
return values;
|
|
}
|
|
|
|
|
|
/**
|
|
*
|
|
* @param {boolean} selected
|
|
* @param {boolean} hover
|
|
* @returns {boolean}
|
|
*/
|
|
differentState(selected, hover) {
|
|
return ((selected !== this.fontOptions.selectedState) && (hover !== this.fontOptions.hoverState));
|
|
}
|
|
|
|
|
|
/**
|
|
* This explodes the passed text into lines and determines the width, height and number of lines.
|
|
*
|
|
* @param {CanvasRenderingContext2D} ctx
|
|
* @param {boolean} selected
|
|
* @param {boolean} hover
|
|
* @param {string} text the text to explode
|
|
* @returns {{width, height, lines}|*}
|
|
* @private
|
|
*/
|
|
_processLabelText(ctx, selected, hover, text) {
|
|
let self = this;
|
|
|
|
|
|
/**
|
|
* Callback to determine text width; passed to LabelAccumulator instance
|
|
*
|
|
* @param {String} text string to determine width of
|
|
* @param {String} mod font type to use for this text
|
|
* @return {Object} { width, values} width in pixels and font attributes
|
|
*/
|
|
let textWidth = function(text, mod) {
|
|
if (text === undefined) return 0;
|
|
|
|
// TODO: This can be done more efficiently with caching
|
|
let values = self.getFormattingValues(ctx, selected, hover, mod);
|
|
|
|
let width = 0;
|
|
if (text !== '') {
|
|
// NOTE: The following may actually be *incorrect* for the mod fonts!
|
|
// This returns the size with a regular font, bold etc. may
|
|
// have different sizes.
|
|
let measure = ctx.measureText(text);
|
|
width = measure.width;
|
|
}
|
|
|
|
return {width, values: values};
|
|
};
|
|
|
|
|
|
let lines = new LabelAccumulator(textWidth);
|
|
|
|
if (text === undefined || text === "") {
|
|
return lines.finalize();
|
|
}
|
|
|
|
|
|
let overMaxWidth = function(text) {
|
|
let width = ctx.measureText(text).width;
|
|
return (lines.curWidth() + width > self.fontOptions.maxWdt);
|
|
};
|
|
|
|
|
|
/**
|
|
* Determine the longest part of the sentence which still fits in the
|
|
* current max width.
|
|
*
|
|
* @param {Array} words Array of strings signifying a text lines
|
|
* @return {number} index of first item in string making string go over max
|
|
*/
|
|
let getLongestFit = function(words) {
|
|
let text = '';
|
|
let w = 0;
|
|
|
|
while (w < words.length) {
|
|
let pre = (text === '') ? '' : ' ';
|
|
let newText = text + pre + words[w];
|
|
|
|
if (overMaxWidth(newText)) break;
|
|
text = newText;
|
|
w++;
|
|
}
|
|
|
|
return w;
|
|
};
|
|
|
|
/**
|
|
* Determine the longest part of the string which still fits in the
|
|
* current max width.
|
|
*
|
|
* @param {Array} words Array of strings signifying a text lines
|
|
* @return {number} index of first item in string making string go over max
|
|
*/
|
|
let getLongestFitWord = function(words) {
|
|
let w = 0;
|
|
|
|
while (w < words.length) {
|
|
if (overMaxWidth(words.slice(0,w))) break;
|
|
w++;
|
|
}
|
|
|
|
return w;
|
|
};
|
|
|
|
|
|
let splitStringIntoLines = function(str, mod = 'normal', appendLast = false) {
|
|
let words = str.split(" ");
|
|
|
|
while (words.length > 0) {
|
|
let w = getLongestFit(words);
|
|
|
|
if (w === 0) {
|
|
// Special case: the first word may already
|
|
// be larger than the max width.
|
|
let word = words[0];
|
|
|
|
// Break the word to the largest part that fits the line
|
|
let x = getLongestFitWord(word);
|
|
lines.newLine(word.slice(0, x), mod);
|
|
|
|
// Adjust the word, so that the rest will be done next iteration
|
|
words[0] = word.slice(x);
|
|
} else {
|
|
let text = words.slice(0, w).join(" ");
|
|
|
|
if (w == words.length && appendLast) {
|
|
lines.append(text, mod);
|
|
} else {
|
|
lines.newLine(text, mod);
|
|
}
|
|
|
|
words = words.slice(w);
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
let nlLines = String(text).split('\n');
|
|
let lineCount = nlLines.length;
|
|
|
|
if (this.elementOptions.font.multi) {
|
|
// Multi-font case: styling tags active
|
|
for (let i = 0; i < lineCount; i++) {
|
|
let blocks = this.splitBlocks(nlLines[i], this.elementOptions.font.multi);
|
|
if (blocks === undefined) continue;
|
|
|
|
if (blocks.length === 0) {
|
|
lines.newLine("");
|
|
continue;
|
|
}
|
|
|
|
if (this.fontOptions.maxWdt > 0) {
|
|
// widthConstraint.maximum defined
|
|
//console.log('Running widthConstraint multi, max: ' + this.fontOptions.maxWdt);
|
|
for (let j = 0; j < blocks.length; j++) {
|
|
let mod = blocks[j].mod;
|
|
let text = blocks[j].text;
|
|
splitStringIntoLines(text, mod, true);
|
|
}
|
|
} else {
|
|
// widthConstraint.maximum NOT defined
|
|
for (let j = 0; j < blocks.length; j++) {
|
|
let mod = blocks[j].mod;
|
|
let text = blocks[j].text;
|
|
lines.append(text, mod);
|
|
}
|
|
}
|
|
|
|
lines.newLine();
|
|
}
|
|
} else {
|
|
// Single-font case
|
|
if (this.fontOptions.maxWdt > 0) {
|
|
// widthConstraint.maximum defined
|
|
// console.log('Running widthConstraint normal, max: ' + this.fontOptions.maxWdt);
|
|
for (let i = 0; i < lineCount; i++) {
|
|
splitStringIntoLines(nlLines[i]);
|
|
}
|
|
} else {
|
|
// widthConstraint.maximum NOT defined
|
|
for (let i = 0; i < lineCount; i++) {
|
|
lines.newLine(nlLines[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
return lines.finalize();
|
|
}
|
|
|
|
|
|
/**
|
|
* This explodes the label string into lines and sets the width, height and number of lines.
|
|
* @param {CanvasRenderingContext2D} ctx
|
|
* @param {boolean} selected
|
|
* @param {boolean} hover
|
|
* @private
|
|
*/
|
|
_processLabel(ctx, selected, hover) {
|
|
let state = this._processLabelText(ctx, selected, hover, this.elementOptions.label);
|
|
|
|
if ((this.fontOptions.minWdt > 0) && (state.width < this.fontOptions.minWdt)) {
|
|
state.width = this.fontOptions.minWdt;
|
|
}
|
|
|
|
this.size.labelHeight =state.height;
|
|
if ((this.fontOptions.minHgt > 0) && (state.height < this.fontOptions.minHgt)) {
|
|
state.height = this.fontOptions.minHgt;
|
|
}
|
|
|
|
this.lines = state.lines;
|
|
this.lineCount = state.lines.length;
|
|
this.size.width = state.width;
|
|
this.size.height = state.height;
|
|
this.selectedState = selected;
|
|
this.hoverState = hover;
|
|
}
|
|
}
|
|
|
|
export default Label;
|