kmap-ui
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A components of zmap base on vue2.X
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JavaScript
/* Copyright (c) 2015 Jean-Marc VIGLINO,
released under the CeCILL-B license (French BSD license)
(http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.txt).
*/
import ol_ext_inherits from '../util/ext'
import ol_style_RegularShape from 'ol/style/RegularShape'
import ol_style_Image from 'ol/style/Image'
import {asString as ol_color_asString} from 'ol/color'
/**
* @classdesc
* A marker style to use with font symbols.
*
* @constructor
* @param {} options Options.
* @param {number} options.glyph the glyph name or a char to display as symbol.
* The name must be added using the {@link ol.style.FontSymbol.addDefs} function.
* @param {string} options.form
* none|circle|poi|bubble|marker|coma|shield|blazon|bookmark|hexagon|diamond|triangle|sign|ban|lozenge|square
* a form that will enclose the glyph, default none
* @param {number} options.radius
* @param {number} options.rotation
* @param {number} options.rotateWithView
* @param {number} options.opacity
* @param {number} options.fontSize, default 1
* @param {string} options.fontStyle the font style (bold, italic, bold italic, etc), default none
* @param {boolean} options.gradient true to display a gradient on the symbol
* @param {_ol_style_Fill_} options.fill
* @param {_ol_style_Stroke_} options.stroke
* @extends {ol_style_RegularShape}
* @implements {ol.structs.IHasChecksum}
* @api
*/
var ol_style_FontSymbol = function(options) {
options = options || {};
var strokeWidth = 0;
if (options.stroke) {
strokeWidth = options.stroke.getWidth();
}
ol_style_RegularShape.call (this, {
radius: options.radius,
fill:options.fill,
rotation:options.rotation,
rotateWithView: options.rotateWithView
});
if (typeof(options.opacity)=="number") this.setOpacity(options.opacity);
this.color_ = options.color;
this.fontSize_ = options.fontSize || 1;
this.fontStyle_ = options.fontStyle || '';
this.stroke_ = options.stroke;
this.fill_ = options.fill;
this.radius_ = options.radius -strokeWidth;
this.form_ = options.form || "none";
this.gradient_ = options.gradient;
this.offset_ = [options.offsetX ? options.offsetX :0, options.offsetY ? options.offsetY :0];
this.glyph_ = this.getGlyph(options.glyph) || "";
this.renderMarker_();
};
ol_ext_inherits(ol_style_FontSymbol, ol_style_RegularShape);
/** Cool stuff to get the image symbol for a style
*/
ol_style_Image.prototype.getImagePNG = function() {
var canvas = this.getImage();
if (canvas) {
try { return canvas.toDataURL("image/png"); }
catch(e) { return false; }
} else {
return false;
}
}
/**
* Font defs
*/
ol_style_FontSymbol.prototype.defs = { 'fonts':{}, 'glyphs':{} };
/** Static function : add new font defs
* @param {String|Object} font the font desciption
* @param {} glyphs a key / value list of glyph definitions.
* Each key is the name of the glyph,
* the value is an object that code the font, the caracter code,
* the name and a search string for the glyph.
*/
ol_style_FontSymbol.addDefs = function(font, glyphs) {
var thefont = font;
if (typeof(font) == "string") thefont = {"font":font, "name":font, "copyright":"" };
if (!thefont.font || typeof(thefont.font) != "string") {
console.log("bad font def");
return;
}
var fontname = thefont.font;
ol_style_FontSymbol.prototype.defs.fonts[fontname] = thefont;
for (var i in glyphs) {
var g = glyphs[i];
if (typeof(g) == "string" && g.length==1) g = { char: g };
ol_style_FontSymbol.prototype.defs.glyphs[i] = {
font: thefont.font,
char: g.char || ""+String.fromCharCode(g.code) || "",
theme: g.theme || thefont.name,
name: g.name || i,
search: g.search || ""
};
}
};
/**
* Clones the style.
* @return {ol_style_FontSymbol}
*/
ol_style_FontSymbol.prototype.clone = function() {
var g = new ol_style_FontSymbol({
glyph: "",
color: this.color_,
fontSize: this.fontSize_,
fontStyle: this.fontStyle_,
stroke: this.stroke_,
fill: this.fill_,
radius: this.radius_ + (this.stroke_ ? this.stroke_.getWidth():0),
form: this.form_,
gradient: this.gradient_,
offsetX: this.offset_[0],
offsetY: this.offset_[1],
opacity: this.getOpacity(),
rotation: this.getRotation(),
rotateWithView: this.getRotateWithView()
});
g.setScale(this.getScale());
g.glyph_ = this.glyph_;
g.renderMarker_();
return g;
};
/**
* Get the fill style for the symbol.
* @return {ol_style_Fill} Fill style.
* @api
*/
ol_style_FontSymbol.prototype.getFill = function() {
return this.fill_;
};
/**
* Get the stroke style for the symbol.
* @return {_ol_style_Stroke_} Stroke style.
* @api
*/
ol_style_FontSymbol.prototype.getStroke = function() {
return this.stroke_;
};
/**
* Get the glyph definition for the symbol.
* @param {string|undefined} name a glyph name to get the definition, default return the glyph definition for the style.
* @return {_ol_style_Stroke_} Stroke style.
* @api
*/
ol_style_FontSymbol.prototype.getGlyph = function(name) {
if (name) return ol_style_FontSymbol.prototype.defs.glyphs[name] || { "font":"none","char":name.charAt(0),"theme":"none","name":"none", "search":""};
else return this.glyph_;
};
/**
* Get the glyph name.
* @return {string} the name
* @api
*/
ol_style_FontSymbol.prototype.getGlyphName = function() {
for (var i in ol_style_FontSymbol.prototype.defs.glyphs) {
if (ol_style_FontSymbol.prototype.defs.glyphs[i] === this.glyph_) return i;
}
return "";
};
/**
* Get the stroke style for the symbol.
* @return {_ol_style_Stroke_} Stroke style.
* @api
*/
ol_style_FontSymbol.prototype.getFontInfo = function(glyph) {
return ol_style_FontSymbol.prototype.defs.fonts[glyph.font];
}
/** @private
*/
ol_style_FontSymbol.prototype.renderMarker_ = function(pixelratio) {
if (!pixelratio) {
if (this.getPixelRatio) {
pixelratio = window.devicePixelRatio;
this.renderMarker_(pixelratio);
if (this.getPixelRatio && pixelratio!==1) this.renderMarker_(1);
} else {
this.renderMarker_(1);
}
return;
}
var strokeStyle;
var strokeWidth = 0;
if (this.stroke_) {
strokeStyle = ol_color_asString(this.stroke_.getColor());
strokeWidth = this.stroke_.getWidth();
}
// get canvas
var canvas = this.getImage(pixelratio);
//console.log(this.getImage().width+" / "+(2 * (this.radius_ + strokeWidth) + 1));
/** @type {ol_style_FontSymbol.RenderOptions} */
var renderOptions = {
strokeStyle: strokeStyle,
strokeWidth: strokeWidth,
size: canvas.width/pixelratio,
};
// draw the circle on the canvas
var context = (canvas.getContext('2d'));
context.clearRect(0, 0, canvas.width, canvas.height);
this.drawMarker_(renderOptions, context, 0, 0, pixelratio);
// Set Anchor
var a = this.getAnchor();
a[0] = canvas.width / 2 - this.offset_[0];
a[1] = canvas.width / 2 - this.offset_[1];
//this.createMarkerHitDetectionCanvas_(renderOptions);
};
/**
* @private
* @param {ol_style_FontSymbol.RenderOptions} renderOptions
* @param {CanvasRenderingContext2D} context
*/
ol_style_FontSymbol.prototype.drawPath_ = function(renderOptions, context) {
var s = 2*this.radius_+renderOptions.strokeWidth+1;
var w = renderOptions.strokeWidth/2;
var c = renderOptions.size / 2;
// Transfo to place the glyph at the right place
var transfo = { fac:1, posX:renderOptions.size / 2, posY:renderOptions.size / 2 };
context.lineJoin = 'round';
context.beginPath();
// Draw the path with the form
switch (this.form_) {
case "none": {
transfo.fac=1;
break;
}
case "circle":
case "ban": {
context.arc ( c, c, s/2, 0, 2 * Math.PI, true);
break;
}
case "poi": {
context.arc ( c, c -0.4*this.radius_, 0.6*this.radius_, 0.15*Math.PI, 0.85*Math.PI, true);
context.lineTo ( c-0.89*0.05*s, (0.95+0.45*0.05)*s+w);
context.arc ( c, 0.95*s+w, 0.05*s, 0.85*Math.PI, 0.15*Math.PI, true);
transfo = { fac:0.45, posX:c, posY:c -0.35*this.radius_ };
break;
}
case "bubble": {
context.arc ( c, c -0.2*this.radius_, 0.8*this.radius_, 0.4*Math.PI, 0.6*Math.PI, true);
context.lineTo ( 0.5*s+w, s+w);
transfo = { fac:0.7, posX:c, posY:c -0.2*this.radius_ };
break;
}
case "marker": {
context.arc ( c, c -0.2*this.radius_, 0.8*this.radius_, 0.25*Math.PI, 0.75*Math.PI, true);
context.lineTo ( 0.5*s+w, s+w);
transfo = { fac:0.7, posX: c, posY: c -0.2*this.radius_ };
break;
}
case "coma": {
context.moveTo ( c + 0.8*this.radius_, c -0.2*this.radius_);
context.quadraticCurveTo ( 0.95*s+w, 0.75*s+w, 0.5*s+w, s+w);
context.arc ( c, c -0.2*this.radius_, 0.8*this.radius_, 0.45*Math.PI, 0, false);
transfo = { fac:0.7, posX: c, posY: c -0.2*this.radius_ };
break;
}
default: {
var pts;
switch (this.form_) {
case "shield": {
pts = [ 0.05,0, 0.95,0, 0.95,0.8, 0.5,1, 0.05,0.8, 0.05,0 ];
transfo.posY = 0.45*s+w ;
break;
}
case "blazon": {
pts = [ 0.1,0, 0.9,0, 0.9,0.8, 0.6,0.8, 0.5,1, 0.4,0.8, 0.1,0.8, 0.1,0 ];
transfo.fac = 0.8;
transfo.posY = 0.4*s+w ;
break;
}
case "bookmark": {
pts = [ 0.05,0, 0.95,0, 0.95,1, 0.5,0.8, 0.05,1, 0.05,0 ];
transfo.fac = 0.9;
transfo.posY = 0.4*s+w ;
break;
}
case "hexagon": {
pts = [ 0.05,0.2, 0.5,0, 0.95,0.2, 0.95,0.8, 0.5,1, 0.05,0.8, 0.05,0.2 ];
transfo.fac = 0.9;
transfo.posY = 0.5*s+w ;
break;
}
case "diamond": {
pts = [ 0.25,0, 0.75,0, 1,0.2, 1,0.4, 0.5,1, 0,0.4, 0,0.2, 0.25,0 ];
transfo.fac = 0.75 ;
transfo.posY = 0.35*s+w ;
break;
}
case "triangle": {
pts = [ 0,0, 1,0, 0.5,1, 0,0 ];
transfo.fac = 0.6 ;
transfo.posY = 0.3*s+w ;
break;
}
case "sign": {
pts = [ 0.5,0.05, 1,0.95, 0,0.95, 0.5,0.05 ];
transfo.fac = 0.7 ;
transfo.posY = 0.65*s+w ;
break;
}
case "lozenge": {
pts = [ 0.5,0, 1,0.5, 0.5,1, 0,0.5, 0.5,0 ];
transfo.fac = 0.7;
break;
}
case "square":
default: {
pts = [ 0,0, 1,0, 1,1, 0,1, 0,0 ];
break;
}
}
for (var i=0; i<pts.length; i+=2) context.lineTo ( pts[i]*s+w, pts[i+1]*s+w);
}
}
context.closePath();
return transfo;
}
/**
* @private
* @param {ol_style_FontSymbol.RenderOptions} renderOptions
* @param {CanvasRenderingContext2D} context
* @param {number} x The origin for the symbol (x).
* @param {number} y The origin for the symbol (y).
*/
ol_style_FontSymbol.prototype.drawMarker_ = function(renderOptions, context, x, y, pixelratio) {
var fcolor = this.fill_ ? this.fill_.getColor() : "#000";
var scolor = this.stroke_ ? this.stroke_.getColor() : "#000";
if (this.form_ == "none" && this.stroke_ && this.fill_) {
scolor = this.fill_.getColor();
fcolor = this.stroke_.getColor();
}
// reset transform
context.setTransform(pixelratio, 0, 0, pixelratio, 0, 0);
// then move to (x, y)
context.translate(x, y);
var tr = this.drawPath_(renderOptions, context, pixelratio);
if (this.fill_) {
if (this.gradient_ && this.form_!="none") {
var grd = context.createLinearGradient(0,0,renderOptions.size/2,renderOptions.size);
grd.addColorStop (1, ol_color_asString(fcolor));
grd.addColorStop (0, ol_color_asString(scolor));
context.fillStyle = grd;
} else {
context.fillStyle = ol_color_asString(fcolor);
}
context.fill();
}
if (this.stroke_ && renderOptions.strokeWidth) {
context.strokeStyle = renderOptions.strokeStyle;
context.lineWidth = renderOptions.strokeWidth;
context.stroke();
}
// Draw the symbol
if (this.glyph_.char) {
context.font = this.fontStyle_ +' '
+ (2*tr.fac*(this.radius_)*this.fontSize_)+"px "
+ this.glyph_.font;
context.strokeStyle = context.fillStyle;
context.lineWidth = renderOptions.strokeWidth * (this.form_ == "none" ? 2:1);
context.fillStyle = ol_color_asString(this.color_ || scolor);
context.textAlign = "center";
context.textBaseline = "middle";
var t = this.glyph_.char;
if (renderOptions.strokeWidth && scolor!="transparent") context.strokeText(t, tr.posX, tr.posY);
context.fillText(t, tr.posX, tr.posY);
}
if (this.form_=="ban" && this.stroke_ && renderOptions.strokeWidth) {
context.strokeStyle = renderOptions.strokeStyle;
context.lineWidth = renderOptions.strokeWidth;
var r = this.radius_ + renderOptions.strokeWidth;
var d = this.radius_ * Math.cos(Math.PI/4);
context.moveTo(r + d, r - d);
context.lineTo(r - d, r + d);
context.stroke();
}
};
/**
* @inheritDoc
*/
ol_style_FontSymbol.prototype.getChecksum = function() {
var strokeChecksum = (this.stroke_!==null) ? this.stroke_.getChecksum() : '-';
var fillChecksum = (this.fill_!==null) ? this.fill_.getChecksum() : '-';
var recalculate = (this.checksums_===null)
|| (strokeChecksum != this.checksums_[1]
|| fillChecksum != this.checksums_[2]
|| this.radius_ != this.checksums_[3]
|| this.form_+"-"+this.glyphs_ != this.checksums_[4]
);
if (recalculate) {
var checksum = 'c' + strokeChecksum + fillChecksum
+ ((this.radius_ !== void 0) ? this.radius_.toString() : '-')
+ this.form_+"-"+this.glyphs_;
this.checksums_ = [checksum, strokeChecksum, fillChecksum, this.radius_, this.form_+"-"+this.glyphs_];
}
return this.checksums_[0];
};
export default ol_style_FontSymbol