Read styles from styles.xml

2 files changed, 53 insertions, 0 deletions

diff --git a/lib/docx/styles-reader.js b/lib/docx/styles-reader.js
new file mode 100644
index 0000000..d896d3d
--- /dev/null
+++ b/lib/docx/styles-reader.js
@@ -0,0 +1,25 @@
+exports.readStylesXml = readStylesXml;
+
+function Styles(paragraphStyles) {
+    return {
+        findParagraphStyleById: function(styleId) {
+            return paragraphStyles[styleId];
+        }
+    };
+}
+
+function readStylesXml(xml) {
+    var paragraphStyles = [];
+    
+    xml.root.getElementsByTagName("w:style").forEach(function(styleElement) {
+        var style = readStyleElement(styleElement);
+        paragraphStyles[style.styleId] = style;
+    });
+    
+    return new Styles(paragraphStyles);
+}
+
+function readStyleElement(styleElement) {
+    var styleId = styleElement.attributes["w:styleId"];
+    return {styleId: styleId};
+}
diff --git a/tests/docx/styles-reader.tests.js b/tests/docx/styles-reader.tests.js
new file mode 100644
index 0000000..dd82602
--- /dev/null
+++ b/tests/docx/styles-reader.tests.js
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+var assert = require("assert");
+
+var duck = require("duck");
+
+var readStylesXml = require("../../lib/docx/styles-reader").readStylesXml;
+var XmlElement = require("../../lib/xmlreader").Element;
+var test = require("../testing").test;
+
+
+describe('readStylesXml', function() {
+    test('paragraph style is null if no style with that ID exists', function() {
+        var styles = readStylesXml({
+            root: new XmlElement("w:styles", {}, [])
+        });
+        assert.equal(styles.findParagraphStyleById("Heading1"), null);
+    });
+    
+    test('paragraph style can be found by ID', function() {
+        var styles = readStylesXml({
+            root: new XmlElement("w:styles", {}, [
+                new XmlElement("w:style", {"w:styleId": "Heading1"}, [
+                    new XmlElement("w:name", {"w:val": "Heading 1"}, [])
+                ])
+            ])
+        });
+        assert.equal(styles.findParagraphStyleById("Heading1").styleId, "Heading1");
+    });
+});