added jsMath files

[lambda.git] / jsMath / extensions / font.js

diff --git a/jsMath/extensions/font.js b/jsMath/extensions/font.js
new file mode 100644 (file)
index 0000000..0c98ca4
--- /dev/null
+++ b/jsMath/extensions/font.js
@@ -0,0 +1,38 @@
+jsMath.Package(jsMath.Parser,{
+
+  macros: {font: 'Font'},
+  fontCS: {},
+  
+  /*
+   *  Get a CS name or give an error
+   */
+  GetCSname: function (cmd) {
+    var c = this.GetNext();
+    if (c != this.cmd) {this.Error(cmd+" must be followed by a control sequence"); return null}
+    var cs = this.trimSpaces(this.GetArgument(cmd)); if (this.error) {return null};
+    return cs.substr(1);
+  },
+
+  /*
+   *  Handle the \font command
+   */
+  Font: function (name) {
+    var cs = this.GetCSname(this.cmd+name); if (this.error) return;
+    while (this.nextIsSpace()) {this.i++}
+    if (this.string.charAt(this.i++) == '=') {
+      while (this.nextIsSpace()) {this.i++}
+      var font = this.string.slice(this.i).match(/^[a-z]+[0-9]+/i);
+      if (font) {
+        this.i += (new String(font)).length;
+        if (jsMath.TeX.famName[font] != null) {
+          this.macros[cs] = ['HandleFont',jsMath.TeX.famName[font]];
+        } else {
+          this.macros[cs] = ['Extension',jsMath.Font.URL(font),"fontCS"];
+          this.fontCS[cs] = 1; // so Extension has something to delete
+        }
+      } else {this.Error("Missing font name")}
+    } else {this.Error("Missing font definition")}
+  }
+  
+});
+