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874 lines
31 KiB
874 lines
31 KiB
let util = require('../../../../util');
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class Label {
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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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setOptions(options, allowDeletion = false) {
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this.elementOptions = options;
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// We want to keep the font options seperated 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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static parseOptions(parentOptions, newOptions, allowDeletion = false) {
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if (typeof newOptions.font === 'string') {
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let newOptionsArray = newOptions.font.split(" ");
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parentOptions.size = newOptionsArray[0].replace("px",'');
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parentOptions.face = newOptionsArray[1];
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parentOptions.color = newOptionsArray[2];
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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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// set the width and height constraints based on 'nearest' value
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constrain(elementOptions, options, defaultOptions) {
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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 pile = [options, elementOptions, defaultOptions];
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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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// 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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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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propagateFonts(options, groupOptions, defaultOptions) {
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if (this.fontOptions.multi) {
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let mods = [ 'bold', 'ital', 'boldital', 'mono' ];
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for (const mod of mods) {
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let optionsFontMod;
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if (options.font) {
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optionsFontMod = options.font[mod];
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}
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if (typeof optionsFontMod === 'string') {
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let modOptionsArray = optionsFontMod.split(" ");
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this.fontOptions[mod].size = modOptionsArray[0].replace("px","");
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this.fontOptions[mod].face = modOptionsArray[1];
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this.fontOptions[mod].color = modOptionsArray[2];
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this.fontOptions[mod].vadjust = this.fontOptions.vadjust;
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this.fontOptions[mod].mod = defaultOptions.font[mod].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: We want to capture any direct settings and overrides, but
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// fall back to the base font if there aren't any. We make a
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// special exception for mono, since we probably don't want to
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// sync to a the base font face.
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//
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// if the mod face is in the node's options, use it
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// else if the mod face is in the global options, use it
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// else if the face is in the global options, use it
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// else use the base font's face.
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if (optionsFontMod && optionsFontMod.hasOwnProperty('face')) {
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this.fontOptions[mod].face = optionsFontMod.face;
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} else if (groupOptions.font && groupOptions.font[mod] &&
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groupOptions.font[mod].hasOwnProperty('face')) {
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this.fontOptions[mod].face = groupOptions.font[mod].face;
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} else if (mod === 'mono') {
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this.fontOptions[mod].face = defaultOptions.font[mod].face;
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} else if (groupOptions.font &&
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groupOptions.font.hasOwnProperty('face')) {
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this.fontOptions[mod].face = groupOptions.font.face;
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} else {
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this.fontOptions[mod].face = this.fontOptions.face;
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}
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// color: this is handled just like the face.
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if (optionsFontMod && optionsFontMod.hasOwnProperty('color')) {
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this.fontOptions[mod].color = optionsFontMod.color;
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} else if (groupOptions.font && groupOptions.font[mod] &&
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groupOptions.font[mod].hasOwnProperty('color')) {
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this.fontOptions[mod].color = groupOptions.font[mod].color;
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} else if (groupOptions.font &&
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groupOptions.font.hasOwnProperty('color')) {
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this.fontOptions[mod].color = groupOptions.font.color;
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} else {
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this.fontOptions[mod].color = this.fontOptions.color;
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}
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// mod: this is handled just like the face, except we never grab the
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// base font's mod. We know they're in the defaultOptions, and unless
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// we've been steered away from them, we use the default.
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if (optionsFontMod && optionsFontMod.hasOwnProperty('mod')) {
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this.fontOptions[mod].mod = optionsFontMod.mod;
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} else if (groupOptions.font && groupOptions.font[mod] &&
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groupOptions.font[mod].hasOwnProperty('mod')) {
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this.fontOptions[mod].mod = groupOptions.font[mod].mod;
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} else if (groupOptions.font &&
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groupOptions.font.hasOwnProperty('mod')) {
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this.fontOptions[mod].mod = groupOptions.font.mod;
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} else {
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this.fontOptions[mod].mod = defaultOptions.font[mod].mod;
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}
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// size: 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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//
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// if the mod size is in the node's options, use it
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// else if the mod size is in the global options, use it
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// else if the mod face is the same as the default and the base face
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// is the same as the default, scale the mod size using the same
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// ratio
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// else if the size is in the global options, use it
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// else use the base font's size.
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if (optionsFontMod && optionsFontMod.hasOwnProperty('size')) {
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this.fontOptions[mod].size = optionsFontMod.size;
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} else if (groupOptions.font && groupOptions.font[mod] &&
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groupOptions.font[mod].hasOwnProperty('size')) {
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this.fontOptions[mod].size = groupOptions.font[mod].size;
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} else if ((this.fontOptions[mod].face === defaultOptions.font[mod].face) &&
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(this.fontOptions.face === defaultOptions.font.face)) {
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let ratio = this.fontOptions.size / Number(defaultOptions.font.size);
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this.fontOptions[mod].size = defaultOptions.font[mod].size * ratio;
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} else if (groupOptions.font &&
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groupOptions.font.hasOwnProperty('size')) {
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this.fontOptions[mod].size = groupOptions.font.size;
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} else {
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this.fontOptions[mod].size = this.fontOptions.size;
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}
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// vadjust: this is handled just like the size.
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if (optionsFontMod && optionsFontMod.hasOwnProperty('vadjust')) {
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this.fontOptions[mod].vadjust = optionsFontMod.vadjust;
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} else if (groupOptions.font &&
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groupOptions.font[mod] && groupOptions.font[mod].hasOwnProperty('vadjust')) {
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this.fontOptions[mod].vadjust = groupOptions.font[mod].vadjust;
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} else if ((this.fontOptions[mod].face === defaultOptions.font[mod].face) &&
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(this.fontOptions.face === defaultOptions.font.face)) {
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let ratio = this.fontOptions.size / Number(defaultOptions.font.size);
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this.fontOptions[mod].vadjust = defaultOptions.font[mod].vadjust * Math.round(ratio);
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} else if (groupOptions.font &&
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groupOptions.font.hasOwnProperty('vadjust')) {
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this.fontOptions[mod].vadjust = groupOptions.font.vadjust;
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} else {
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this.fontOptions[mod].vadjust = this.fontOptions.vadjust;
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}
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}
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this.fontOptions[mod].size = Number(this.fontOptions[mod].size);
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this.fontOptions[mod].vadjust = Number(this.fontOptions[mod].vadjust);
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}
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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 ctx
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* @param x
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* @param y
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* @param selected
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* @param baseline
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*/
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draw(ctx, x, y, selected, 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, 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, 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 ctx
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* @param x
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* @param baseline
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* @private
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*/
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_drawText(ctx, selected, 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)
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if (viewFontSize >= this.elementOptions.scaling.label.maxVisible) {
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fontSize = Number(this.elementOptions.scaling.label.maxVisible) / this.body.view.scale;
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}
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let yLine = this.size.yLine;
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[x, yLine] = this._setAlignment(ctx, x, yLine, baseline);
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ctx.textAlign = 'left'
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x = x - this.size.width / 2; // Shift label 1/2-distance to the left
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if ((this.fontOptions.valign) && (this.size.height > this.size.labelHeight)) {
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if (this.fontOptions.valign === 'top') {
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yLine -= (this.size.height - this.size.labelHeight) / 2;
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}
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if (this.fontOptions.valign === 'bottom') {
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yLine += (this.size.height - this.size.labelHeight) / 2;
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}
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}
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// draw the text
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for (let i = 0; i < this.lineCount; i++) {
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if (this.lines[i] && this.lines[i].blocks) {
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let width = 0;
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if (this.isEdgeLabel || this.fontOptions.align === 'center') {
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width += (this.size.width - this.lines[i].width) / 2
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} else if (this.fontOptions.align === 'right') {
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width += (this.size.width - this.lines[i].width)
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}
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for (let j = 0; j < this.lines[i].blocks.length; j++) {
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let block = this.lines[i].blocks[j];
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ctx.font = block.font;
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let [fontColor, strokeColor] = this._getColor(block.color, viewFontSize);
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if (this.fontOptions.strokeWidth > 0) {
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ctx.lineWidth = this.fontOptions.strokeWidth;
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ctx.strokeStyle = strokeColor;
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ctx.lineJoin = 'round';
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ctx.strokeText(block.text, x + width, yLine + block.vadjust);
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}
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ctx.fillStyle = fontColor;
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ctx.fillText(block.text, x + width, yLine + block.vadjust);
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width += block.width;
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}
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yLine += this.lines[i].height;
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}
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}
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}
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_setAlignment(ctx, x, yLine, baseline) {
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// check for label alignment (for edges)
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// TODO: make alignment for nodes
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if (this.isEdgeLabel && this.fontOptions.align !== 'horizontal' && this.pointToSelf === false) {
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x = 0;
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yLine = 0;
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let lineMargin = 2;
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if (this.fontOptions.align === 'top') {
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ctx.textBaseline = 'alphabetic';
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yLine -= 2 * lineMargin; // distance from edge, required because we use alphabetic. Alphabetic has less difference between browsers
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}
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else if (this.fontOptions.align === 'bottom') {
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ctx.textBaseline = 'hanging';
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yLine += 2 * lineMargin;// distance from edge, required because we use hanging. Hanging has less difference between browsers
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}
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else {
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ctx.textBaseline = 'middle';
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}
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}
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else {
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ctx.textBaseline = baseline;
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}
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return [x,yLine];
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}
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/**
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* fade in when relative scale is between threshold and threshold - 1.
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* If the relative scale would be smaller than threshold -1 the draw function would have returned before coming here.
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*
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* @param viewFontSize
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* @returns {*[]}
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* @private
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*/
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_getColor(color, viewFontSize) {
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let fontColor = color || '#000000';
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let strokeColor = this.fontOptions.strokeColor || '#ffffff';
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if (viewFontSize <= this.elementOptions.scaling.label.drawThreshold) {
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let opacity = Math.max(0, Math.min(1, 1 - (this.elementOptions.scaling.label.drawThreshold - viewFontSize)));
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fontColor = util.overrideOpacity(fontColor, opacity);
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strokeColor = util.overrideOpacity(strokeColor, opacity);
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}
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return [fontColor, strokeColor];
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}
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/**
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*
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* @param ctx
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* @param selected
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* @returns {{width: number, height: number}}
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*/
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getTextSize(ctx, selected = false) {
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this._processLabel(ctx, selected);
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return {
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width: this.size.width,
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height: this.size.height,
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lineCount: this.lineCount
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};
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}
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/**
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*
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* @param ctx
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* @param selected
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* @param x
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* @param y
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* @param baseline
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*/
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calculateLabelSize(ctx, selected, x = 0, y = 0, baseline = 'middle') {
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if (this.labelDirty === true) {
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this._processLabel(ctx, selected);
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}
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this.size.left = x - this.size.width * 0.5;
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this.size.top = y - this.size.height * 0.5;
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this.size.yLine = y + (1 - this.lineCount) * 0.5 * this.fontOptions.size;
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if (baseline === "hanging") {
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this.size.top += 0.5 * this.fontOptions.size;
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this.size.top += 4; // distance from node, required because we use hanging. Hanging has less difference between browsers
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this.size.yLine += 4; // distance from node
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}
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this.labelDirty = false;
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}
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/**
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* normalize the markup system
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*/
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decodeMarkupSystem(markupSystem) {
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let system = 'none';
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if (markupSystem === 'markdown' || markupSystem === 'md') {
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system = 'markdown';
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} else if (markupSystem === true || markupSystem === 'html') {
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system = 'html'
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}
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return system;
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}
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/**
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* Explodes a piece of text into single-font blocks using a given markup
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* @param text
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* @param markupSystem
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* @returns [{ text, mod }]
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*/
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splitBlocks(text, markupSystem) {
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let system = this.decodeMarkupSystem(markupSystem);
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if (system === 'none') {
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return [{
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text: text,
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mod: 'normal'
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}]
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} else if (system === 'markdown') {
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return this.splitMarkdownBlocks(text);
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} else if (system === 'html') {
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return this.splitHtmlBlocks(text);
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}
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}
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splitMarkdownBlocks(text) {
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let blocks = [];
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let s = {
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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) {
|
|
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;
|
|
}
|
|
|
|
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) {
|
|
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;
|
|
}
|
|
|
|
setFont(ctx, selected, mod) {
|
|
let height
|
|
let vadjust
|
|
let color
|
|
if (mod === 'normal') {
|
|
ctx.font = (selected && this.elementOptions.labelHighlightBold ? 'bold ' : '') +
|
|
this.fontOptions.size + "px " + this.fontOptions.face;
|
|
color = this.fontOptions.color;
|
|
height = this.fontOptions.size;
|
|
vadjust = this.fontOptions.vadjust;
|
|
} else {
|
|
ctx.font = this.fontOptions[mod].mod + " " +
|
|
this.fontOptions[mod].size + "px " + this.fontOptions[mod].face;
|
|
color = this.fontOptions[mod].color;
|
|
height = this.fontOptions[mod].size;
|
|
vadjust = this.fontOptions[mod].vadjust || 0;
|
|
}
|
|
return {
|
|
font: ctx.font.replace(/"/g, ""),
|
|
color: color,
|
|
height: height,
|
|
vadjust: vadjust
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This explodes the label string into lines and sets the width, height and number of lines.
|
|
* @param ctx
|
|
* @param selected
|
|
* @private
|
|
*/
|
|
_processLabel(ctx, selected) {
|
|
let width = 0;
|
|
let height = 0;
|
|
let nlLines = [];
|
|
let lines = [];
|
|
let k = 0;
|
|
lines.add = function(l, text, font, color, width, height, vadjust) {
|
|
if (this.length == l) {
|
|
this[l] = { width: 0, height: 0, blocks: [] };
|
|
}
|
|
this[l].blocks.push({ text, font, color, width, height, vadjust });
|
|
}
|
|
lines.accumulate = function(l, width, height) {
|
|
this[l].width += width;
|
|
this[l].height = height > this[l].height ? height : this[l].height;
|
|
}
|
|
lines.addAndAccumulate = function(l, text, font, color, width, height, vadjust) {
|
|
this.add(l, text, font, color, width, height, vadjust);
|
|
this.accumulate(l, width, height);
|
|
}
|
|
if (this.elementOptions.label !== undefined) {
|
|
let nlLines = String(this.elementOptions.label).split('\n');
|
|
let lineCount = nlLines.length;
|
|
if (this.elementOptions.font.multi) {
|
|
for (let i = 0; i < lineCount; i++) {
|
|
let blocks = this.splitBlocks(nlLines[i], this.elementOptions.font.multi);
|
|
let lineWidth = 0;
|
|
let lineHeight = 0;
|
|
if (blocks) {
|
|
if (blocks.length == 0) {
|
|
this.setFont(ctx, selected, "normal");
|
|
lines.addAndAccumulate(k, "", ctx.font, "#000000", 0, this.fontOptions.size, this.fontOptions.vadjust);
|
|
height += lines[k].height;
|
|
k++;
|
|
continue;
|
|
}
|
|
for (let j = 0; j < blocks.length; j++) {
|
|
if (this.fontOptions.maxWdt > 0) {
|
|
let metrics = this.setFont(ctx, selected, blocks[j].mod);
|
|
let words = blocks[j].text.split(" ");
|
|
let atStart = true
|
|
let text = "";
|
|
let measure;
|
|
let lastMeasure;
|
|
let w = 0;
|
|
while (w < words.length) {
|
|
let pre = atStart ? "" : " ";
|
|
lastMeasure = measure;
|
|
measure = ctx.measureText(text + pre + words[w]);
|
|
if (lineWidth + measure.width > this.fontOptions.maxWdt) {
|
|
lineHeight = (metrics.height > lineHeight) ? metrics.height : lineHeight;
|
|
lines.add(k, text, ctx.font, metrics.color, lastMeasure.width, metrics.height, metrics.vadjust);
|
|
lines.accumulate(k, lastMeasure.width, lineHeight);
|
|
text = "";
|
|
atStart = true;
|
|
lineWidth = 0;
|
|
width = lines[k].width > width ? lines[k].width : width;
|
|
height += lines[k].height;
|
|
k++;
|
|
} else {
|
|
text = text + pre + words[w];
|
|
if (w === words.length-1) {
|
|
lineHeight = (metrics.height > lineHeight) ? metrics.height : lineHeight;
|
|
lineWidth += measure.width;
|
|
lines.add(k, text, ctx.font, metrics.color, measure.width, metrics.height, metrics.vadjust);
|
|
lines.accumulate(k, measure.width, lineHeight);
|
|
if (j === blocks.length-1) {
|
|
width = lines[k].width > width ? lines[k].width : width;
|
|
height += lines[k].height;
|
|
k++;
|
|
}
|
|
}
|
|
w++;
|
|
atStart = false;
|
|
}
|
|
}
|
|
} else {
|
|
let metrics = this.setFont(ctx, selected, blocks[j].mod)
|
|
let measure = ctx.measureText(blocks[j].text);
|
|
lines.addAndAccumulate(k, blocks[j].text, ctx.font, metrics.color, measure.width, metrics.height, metrics.vadjust);
|
|
width = lines[k].width > width ? lines[k].width : width;
|
|
if (blocks.length-1 === j) {
|
|
height += lines[k].height;
|
|
k++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (let i = 0; i < lineCount; i++) {
|
|
ctx.font = (selected && this.elementOptions.labelHighlightBold ? 'bold ' : '') + this.fontOptions.size + "px " + this.fontOptions.face;
|
|
if (this.fontOptions.maxWdt > 0) {
|
|
let words = nlLines[i].split(" ");
|
|
let text = "";
|
|
let measure;
|
|
let lastMeasure;
|
|
let w = 0;
|
|
while (w < words.length) {
|
|
let pre = (text === "") ? "" : " ";
|
|
lastMeasure = measure;
|
|
measure = ctx.measureText(text + pre + words[w]);
|
|
if (measure.width > this.fontOptions.maxWdt) {
|
|
lines.addAndAccumulate(k, text, ctx.font, this.fontOptions.color, lastMeasure.width, this.fontOptions.size, this.fontOptions.vadjust)
|
|
width = lines[k].width > width ? lines[k].width : width;
|
|
height += lines[k].height;
|
|
text = "";
|
|
k++;
|
|
} else {
|
|
text = text + pre + words[w];
|
|
if (w === words.length-1) {
|
|
lines.addAndAccumulate(k, text, ctx.font, this.fontOptions.color, measure.width, this.fontOptions.size, this.fontOptions.vadjust)
|
|
width = lines[k].width > width ? lines[k].width : width;
|
|
height += lines[k].height;
|
|
k++;
|
|
}
|
|
w++;
|
|
}
|
|
}
|
|
} else {
|
|
let text = nlLines[i];
|
|
let measure = ctx.measureText(text);
|
|
lines.addAndAccumulate(k, text, ctx.font, this.fontOptions.color, measure.width, this.fontOptions.size, this.fontOptions.vadjust);
|
|
width = lines[k].width > width ? lines[k].width : width;
|
|
height += lines[k].height;
|
|
k++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ((this.fontOptions.minWdt > 0) && (width < this.fontOptions.minWdt)) {
|
|
width = this.fontOptions.minWdt;
|
|
}
|
|
this.size.labelHeight = height;
|
|
if ((this.fontOptions.minHgt > 0) && (height < this.fontOptions.minHgt)) {
|
|
height = this.fontOptions.minHgt;
|
|
}
|
|
this.lines = lines;
|
|
this.lineCount = lines.length;
|
|
this.size.width = width;
|
|
this.size.height = height;
|
|
}
|
|
}
|
|
|
|
export default Label;
|