initial commit

chrome.manifest

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+overlay	chrome://browser/content/browser.xul	chrome://context-style-switcher/content/context-style-switcher_overlay.xul
+content	context-style-switcher	chrome/content/

chrome/content/contents.rdf

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+<?xml version="1.0"?>
+<RDF:RDF xmlns:RDF="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+  xmlns:chrome="http://www.mozilla.org/rdf/chrome#">
+  <RDF:Seq RDF:about="urn:mozilla:package:root">
+    <RDF:li RDF:resource="urn:mozilla:package:context-style-switcher"/>
+  </RDF:Seq>
+
+  <RDF:Seq RDF:about="urn:mozilla:overlays">
+    <RDF:li RDF:resource="chrome://browser/content/browser.xul"/>
+  </RDF:Seq>
+
+  <RDF:Seq RDF:about="chrome://browser/content/browser.xul">
+    <RDF:li>chrome://context-style-switcher/content/context-style-switcher_overlay.xul</RDF:li>
+  </RDF:Seq>
+
+  <RDF:Description RDF:about="urn:mozilla:package:context-style-switcher"
+    chrome:name="context-style-switcher"
+    chrome:displayName="Context Style Switcher"
+    chrome:description="Change Page Style via context menu."
+    chrome:author="Kyo Nagashima"
+    chrome:authorURL="http://hail2u.net/archives/fxexts.html"
+    chrome:extension="true"/>
+</RDF:RDF>

chrome/content/context_style_switcher_overlay.js

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+var contextStyleSwitcher = {
+  init: function() {
+    var contextMenu = document.getElementById("contentAreaContextMenu");
+    contextMenu.addEventListener("popupshowing", contextStyleSwitcher.toggleVisibility, false);
+  },
+
+  toggleVisibility: function() {
+    if (gContextMenu.onTextInput
+      || gContextMenu.onImage
+      || gContextMenu.onLink
+      || gContextMenu.isTextSelected) {
+      document.getElementById("context-style-switcher_sep").hidden = true;
+      document.getElementById("context-style-switcher_menu").hidden = true;
+    } else {
+      document.getElementById("context-style-switcher_sep").hidden = false;
+      document.getElementById("context-style-switcher_menu").hidden = false;
+    }
+  }
+}
+
+window.addEventListener("load", contextStyleSwitcher.init, false);

chrome/content/context_style_switcher_overlay.xul

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+<?xml version="1.0"?>
+<!DOCTYPE window [
+<!ENTITY % browserDTD SYSTEM "chrome://browser/locale/browser.dtd">
+%browserDTD;
+]>
+<overlay xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  id="context-style-switcher_overlay">
+  <script type="application/x-javascript"
+    src="chrome://context-style-switcher/content/context-style-switcher_overlay.js"/>
+
+  <popup id="contentAreaContextMenu">
+    <menuseparator id="context-style-switcher_sep"
+      insertbefore="context-sep-properties"/>
+
+    <menu id="context-style-switcher_menu"
+      label="&pageStyleMenu.label;"
+      accesskey="&pageStyleMenu.accesskey;"
+      insertbefore="context-sep-properties">
+      <menupopup onpopupshowing="stylesheetFillPopup(this);"
+        oncommand="stylesheetSwitchAll(window._content, event.target.getAttribute('data')); setStyleDisabled(false);">
+        <menuitem label="&pageStyleNoStyle.label;"
+          accesskey="&pageStyleNoStyle.accesskey;"
+          oncommand="setStyleDisabled(true); event.stopPropagation();"
+          type="radio"/>
+        <menuitem label="&pageStylePersistentOnly.label;"
+          accesskey="&pageStylePersistentOnly.accesskey;"
+          type="radio"
+          checked="true"/>
+        <menuseparator/>
+      </menupopup>
+    </menu>
+  </popup>
+</overlay>

install.rdf

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+<?xml version="1.0"?>
+<RDF:RDF xmlns:RDF="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+  xmlns:em="http://www.mozilla.org/2004/em-rdf#">
+  <RDF:Description about="urn:mozilla:install-manifest">
+    <em:id>{a9f1b95d-50c5-464d-a54b-fd53c5a3fe3c}</em:id>
+    <em:version>1.0.7</em:version>
+
+    <em:targetApplication>
+      <RDF:Description>
+        <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
+        <em:minVersion>1.0</em:minVersion>
+        <em:maxVersion>3.0.*</em:maxVersion>
+      </RDF:Description>
+    </em:targetApplication>
+
+    <em:name>Context Style Switcher</em:name>
+    <em:description>Change Page Style via context menu.</em:description>
+    <em:creator>Kyo Nagashima</em:creator>
+    <em:homepageURL>http://hail2u.net/archives/fxexts.html#context-style-switcher</em:homepageURL>
+
+    <em:file>
+      <RDF:Description about="urn:mozilla:extension:file:context-style-switcher.jar">
+        <em:package>content/context-style-switcher/</em:package>
+      </RDF:Description>
+    </em:file>
+  </RDF:Description>
+</RDF:RDF>