Support fontWeight in text symbolizer

src/objectliterals.jsdoc

@@ -760,6 +760,7 @@
  * @property {string|ol.expr.Expression|undefined} color Color.
  * @property {string|ol.expr.Expression|undefined} fontFamily Font family.
  * @property {number|ol.expr.Expression|undefined} fontSize Font size in pixels.
+ * @property {string|ol.expr.Expression|undefined} fontWeight Font weight.
  * @property {string|ol.expr.Expression} text Text for the label.
  * @property {number|ol.expr.Expression|undefined} opacity Opacity (0-1).
  * @property {ol.style.Stroke|undefined} stroke Stroke symbolizer for text.

src/ol/renderer/canvas/canvasvectorrenderer.js

@@ -286,7 +286,13 @@ ol.renderer.canvas.Vector.prototype.renderText_ =
   if (context.fillStyle !== text.color) {
     context.fillStyle = text.color;
   }
-  context.font = text.fontSize + 'px ' + text.fontFamily;
+
+  // font shorthand values must be given in the correct order
+  // see http://www.w3.org/TR/CSS21/fonts.html#font-shorthand
+  context.font = text.fontWeight + ' ' +
+      text.fontSize + 'px ' +
+      text.fontFamily;
+
   context.globalAlpha = text.opacity;
 
   // TODO: make alignments configurable

src/ol/style/textliteral.js

@@ -8,6 +8,7 @@ goog.require('ol.style.Literal');
  * @typedef {{color: string,
  *            fontFamily: string,
  *            fontSize: number,
+ *            fontWeight: string,
  *            text: string,
  *            opacity: number,
  *            strokeColor: (string|undefined),
@@ -38,6 +39,10 @@ ol.style.TextLiteral = function(options) {
   /** @type {number} */
   this.fontSize = options.fontSize;
 
+  goog.asserts.assertString(options.fontWeight, 'fontWeight must be a string');
+  /** @type {string} */
+  this.fontWeight = options.fontWeight;
+
   goog.asserts.assertString(options.text, 'text must be a string');
   /** @type {string} */
   this.text = options.text;
@@ -92,6 +97,7 @@ ol.style.TextLiteral.prototype.equals = function(other) {
   return this.color == other.color &&
       this.fontFamily == other.fontFamily &&
       this.fontSize == other.fontSize &&
+      this.fontWeight == other.fontWeight &&
       this.opacity == other.opacity &&
       this.strokeColor == other.strokeColor &&
       this.strokeOpacity == other.strokeOpacity &&

src/ol/style/textsymbolizer.js

@@ -44,6 +44,15 @@ ol.style.Text = function(options) {
       (options.fontSize instanceof ol.expr.Expression) ?
           options.fontSize : new ol.expr.Literal(options.fontSize);
 
+  /**
+   * @type {ol.expr.Expression}
+   * @private
+   */
+  this.fontWeight_ = !goog.isDef(options.fontWeight) ?
+      new ol.expr.Literal(ol.style.TextDefaults.fontWeight) :
+      (options.fontWeight instanceof ol.expr.Expression) ?
+          options.fontWeight : new ol.expr.Literal(options.fontWeight);
+
   /**
    * @type {ol.expr.Expression}
    * @private
@@ -102,6 +111,9 @@ ol.style.Text.prototype.createLiteral = function(featureOrType) {
   var fontSize = Number(ol.expr.evaluateFeature(this.fontSize_, feature));
   goog.asserts.assert(!isNaN(fontSize), 'fontSize must be a number');
 
+  var fontWeight = ol.expr.evaluateFeature(this.fontWeight_, feature);
+  goog.asserts.assertString(fontWeight, 'fontWeight must be a string');
+
   var text = ol.expr.evaluateFeature(this.text_, feature);
   goog.asserts.assertString(text, 'text must be a string');
 
@@ -129,6 +141,7 @@ ol.style.Text.prototype.createLiteral = function(featureOrType) {
     color: color,
     fontFamily: fontFamily,
     fontSize: fontSize,
+    fontWeight: fontWeight,
     text: text,
     opacity: opacity,
     strokeColor: strokeColor,
@@ -166,6 +179,15 @@ ol.style.Text.prototype.getFontSize = function() {
 };
 
 
+/**
+ * Get the font weight.
+ * @return {ol.expr.Expression} Font weight.
+ */
+ol.style.Text.prototype.getFontWeight = function() {
+  return this.fontWeight_;
+};
+
+
 /**
  * Get the opacity.
  * @return {ol.expr.Expression} Opacity.
@@ -223,6 +245,16 @@ ol.style.Text.prototype.setFontSize = function(fontSize) {
 };
 
 
+/**
+ * Set the font weight.
+ * @param {ol.expr.Expression} fontWeight Font weight.
+ */
+ol.style.Text.prototype.setFontWeight = function(fontWeight) {
+  goog.asserts.assertInstanceof(fontWeight, ol.expr.Expression);
+  this.fontWeight_ = fontWeight;
+};
+
+
 /**
  * Set the opacity.
  * @param {ol.expr.Expression} opacity Opacity.
@@ -257,6 +289,7 @@ ol.style.Text.prototype.setZIndex = function(zIndex) {
  * @typedef {{color: string,
  *            fontFamily: string,
  *            fontSize: number,
+ *            fontWeight: string,
  *            opacity: number,
  *            zIndex: number}}
  */
@@ -264,6 +297,7 @@ ol.style.TextDefaults = {
   color: '#000',
   fontFamily: 'sans-serif',
   fontSize: 10,
+  fontWeight: 'normal',
   opacity: 1,
   zIndex: 0
 };

test/spec/ol/style/style.test.js

@@ -269,6 +269,7 @@ describe('ol.style.Style', function() {
           color: '#ffffff',
           fontFamily: 'Arial',
           fontSize: 11,
+          fontWeight: 'normal',
           text: 'Test',
           opacity: 0.5,
           zIndex: 0

test/spec/ol/style/textliteral.test.js

@@ -9,6 +9,7 @@ describe('ol.style.TextLiteral', function() {
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 11,
+        fontWeight: 'normal',
         text: 'Test',
         opacity: 0.5,
         zIndex: 0
@@ -22,6 +23,7 @@ describe('ol.style.TextLiteral', function() {
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 11,
+        fontWeight: 'normal',
         text: 'Test',
         opacity: 0.5,
         strokeColor: '#ff0000',
@@ -38,6 +40,7 @@ describe('ol.style.TextLiteral', function() {
           color: '#ff0000',
           fontFamily: 'Arial',
           fontSize: 11,
+          fontWeight: 'normal',
           text: 'Test',
           opacity: 0.5,
           strokeColor: '#ff0000',
@@ -57,6 +60,7 @@ describe('ol.style.TextLiteral', function() {
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 11,
+        fontWeight: 'normal',
         text: 'Test',
         opacity: 0.5,
         zIndex: 0
@@ -65,6 +69,7 @@ describe('ol.style.TextLiteral', function() {
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 11,
+        fontWeight: 'normal',
         text: 'Test',
         opacity: 0.5,
         zIndex: 0
@@ -73,6 +78,7 @@ describe('ol.style.TextLiteral', function() {
         color: '#0000ff',
         fontFamily: 'Arial',
         fontSize: 11,
+        fontWeight: 'normal',
         text: 'Test',
         opacity: 0.5,
         zIndex: 0
@@ -81,6 +87,7 @@ describe('ol.style.TextLiteral', function() {
         color: '#ff0000',
         fontFamily: 'Dingbats',
         fontSize: 11,
+        fontWeight: 'normal',
         text: 'Test',
         opacity: 0.5,
         zIndex: 0
@@ -89,6 +96,16 @@ describe('ol.style.TextLiteral', function() {
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 12,
+        fontWeight: 'normal',
+        text: 'Test',
+        opacity: 0.5,
+        zIndex: 0
+      });
+      var differentFontWeight = new ol.style.TextLiteral({
+        color: '#ff0000',
+        fontFamily: 'Arial',
+        fontSize: 11,
+        fontWeight: 'bold',
         text: 'Test',
         opacity: 0.5,
         zIndex: 0
@@ -97,6 +114,7 @@ describe('ol.style.TextLiteral', function() {
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 11,
+        fontWeight: 'normal',
         text: 'Test',
         opacity: 0.6,
         zIndex: 0
@@ -105,6 +123,7 @@ describe('ol.style.TextLiteral', function() {
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 11,
+        fontWeight: 'normal',
         text: 'Text is not compared for equality',
         opacity: 0.5,
         zIndex: 0
@@ -113,6 +132,7 @@ describe('ol.style.TextLiteral', function() {
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 11,
+        fontWeight: 'normal',
         text: 'Test',
         opacity: 0.5,
         zIndex: 3
@@ -121,6 +141,7 @@ describe('ol.style.TextLiteral', function() {
       expect(literal.equals(differentColor)).to.be(false);
       expect(literal.equals(differentFontFamily)).to.be(false);
       expect(literal.equals(differentFontSize)).to.be(false);
+      expect(literal.equals(differentFontWeight)).to.be(false);
       expect(literal.equals(differentOpacity)).to.be(false);
       expect(literal.equals(equalLiteral2)).to.be(true);
       expect(literal.equals(differentZIndex)).to.be(false);

test/spec/ol/style/textsymbolizer.test.js

@@ -109,6 +109,7 @@ describe('ol.style.Text', function() {
       expect(literal.color).to.be('#000');
       expect(literal.fontFamily).to.be('sans-serif');
       expect(literal.fontSize).to.be(10);
+      expect(literal.fontWeight).to.be('normal');
       expect(literal.text).to.be('Test');
       expect(literal.opacity).to.be(1);
     });
@@ -216,6 +217,20 @@ describe('ol.style.Text', function() {
 
   });
 
+  describe('#getFontWeight()', function() {
+
+    it('returns the font size', function() {
+      var symbolizer = new ol.style.Text({
+        fontWeight: 'bold'
+      });
+
+      var fontWeight = symbolizer.getFontWeight();
+      expect(fontWeight).to.be.a(ol.expr.Literal);
+      expect(fontWeight.getValue()).to.be('bold');
+    });
+
+  });
+
   describe('#getOpacity()', function() {
 
     it('returns the opacity', function() {
@@ -314,6 +329,33 @@ describe('ol.style.Text', function() {
 
   });
 
+  describe('#setFontWeight()', function() {
+
+    it('sets the font size', function() {
+      var symbolizer = new ol.style.Text({
+        fontWeight: 'bold'
+      });
+      symbolizer.setFontWeight(new ol.expr.Literal('900'));
+
+      var fontWeight = symbolizer.getFontWeight();
+      expect(fontWeight).to.be.a(ol.expr.Literal);
+      expect(fontWeight.getValue()).to.be('900');
+    });
+
+    it('throws when not provided an expression', function() {
+      var symbolizer = new ol.style.Text({
+        fontWeight: 'lighter'
+      });
+
+      expect(function() {
+        symbolizer.setFontWeight('bolder');
+      }).throwException(function(err) {
+        expect(err).to.be.a(goog.asserts.AssertionError);
+      });
+    });
+
+  });
+
   describe('#setOpacity()', function() {
 
     it('sets the opacity', function() {