<?xml version="1.0"?>

<bindings id="textBindings"
   xmlns="http://www.mozilla.org/xbl"
   xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
   xmlns:html="http://www.w3.org/1999/xhtml">

  <!-- bound to <description>s -->
  <binding id="text-base">
    <implementation implements="nsIDOMXULDescriptionElement, nsIAccessibleProvider">
      <property name="accessibleType" readonly="true">
        <getter>
          <![CDATA[
            return Components.interfaces.nsIAccessibleProvider.XULText;
          ]]>
        </getter>
      </property>
      <property name="disabled" onset="if (val) this.setAttribute('disabled', 'true');
                                       else this.removeAttribute('disabled');
                                       return val;"
                                onget="return this.getAttribute('disabled') == 'true';"/>
      <property name="value" onget="return this.getAttribute('value');"
                             onset="this.setAttribute('value', val); return val;"/>
      <property name="crop" onget="return this.getAttribute('crop');"
                            onset="this.setAttribute('crop', val); return val;"/>
    </implementation>
  </binding>

  <binding id="text-label" extends="chrome://global/content/bindings/text.xml#text-base">
    <implementation implements="nsIDOMXULLabelElement">
      <property name="accessKey">
        <getter>
          <![CDATA[
            var accessKey = this.getAttribute('accesskey');
            return accessKey ? accessKey[0] : null;
          ]]>
        </getter>
        <setter>
          <![CDATA[
            this.setAttribute('accesskey', val);
            return val;
          ]]>
        </setter>
      </property>

      <property name="control" onget="return getAttribute('control');">
        <setter>
          <![CDATA[
            // After this gets set, the label will use the binding #label-control
            this.setAttribute('control', val);
            return val;
          ]]>
        </setter>
      </property>
    </implementation>
  </binding>

  <binding id="label-control" extends="chrome://global/content/bindings/text.xml#text-label">
    <content>
      <html:span anonid="accessKeyParens"><children/></html:span>
    </content>
    <implementation implements="nsIDOMXULLabelElement">
      <constructor>
        <![CDATA[
          try {
            var prefs = Components.classes["@mozilla.org/preferences-service;1"].
                                   getService(Components.interfaces.nsIPrefBranch);
            this.mUnderlineAccesskey = (prefs.getIntPref("ui.key.menuAccessKey") != 0);

            const nsIPrefLocalizedString =
              Components.interfaces.nsIPrefLocalizedString;

            const prefNameInsertSeparator =
              "intl.menuitems.insertseparatorbeforeaccesskeys";
            const prefNameAlwaysAppendAccessKey =
              "intl.menuitems.alwaysappendaccesskeys";

            var val = prefs.getComplexValue(prefNameInsertSeparator,
                                            nsIPrefLocalizedString).data;
            this.mInsertSeparator = (val == "true");

            val = prefs.getComplexValue(prefNameAlwaysAppendAccessKey,
                                        nsIPrefLocalizedString).data;
            this.mAlwaysAppendAccessKey = (val == "true");
          }
          catch (e) { }
          this.formatAccessKey();
        ]]>
      </constructor>

      <method name="formatAccessKey">
        <body>
          <![CDATA[
            if (!this.mUnderlineAccesskey)
              return;

            var control = this.labeledControlElement;
            if (!control) {
              var bindingParent = document.getBindingParent(this);
              if (bindingParent instanceof Components.interfaces.nsIDOMXULLabeledControlElement) {
                control = bindingParent; // For controls that make the <label> an anon child
              }
            }
            if (control) {
              control.labelElement = this;
            }

            var afterLabel = document.getAnonymousElementByAttribute(this, "anonid", "accessKeyParens");
            afterLabel.textContent = ""; // This does not clear real nodes!

            var oldAccessKey = this.getElementsByAttribute('class', 'accesskey').item(0);
            if (oldAccessKey) { // Clear old accesskey
              this.mergeElement(oldAccessKey);
            }

            var oldHiddenSpan =
              this.getElementsByAttribute('class', 'hiddenColon').item(0);
            if (oldHiddenSpan) {
              this.mergeElement(oldHiddenSpan);
            }

            var accessKey = this.accessKey;
            var labelText = this.textContent;
            if (!accessKey || !labelText || !control) {
              return;
            }
            var accessKeyIndex = -1;
            if (!this.mAlwaysAppendAccessKey) {
              accessKeyIndex = labelText.indexOf(accessKey);
              if (accessKeyIndex < 0) { // Try again in upper case
                accessKeyIndex =
                  labelText.toUpperCase().indexOf(accessKey.toUpperCase());
              }
            }

            const HTML_NS = "http://www.w3.org/1999/xhtml";
            var span = document.createElementNS(HTML_NS, "span");
            span.className = "accesskey";

            // Note that if you change the following code, see the comment of
            // nsTextBoxFrame::UpdateAccessTitle.

            // If accesskey is not in string, append in parentheses
            if (accessKeyIndex < 0) {
              // If end is colon, we should insert before colon.
              // i.e., "label:" -> "label(X):"
              var colonHidden = false;
              if (/:$/.test(labelText)) {
                labelText = labelText.slice(0, -1);
                var hiddenSpan = document.createElementNS(HTML_NS, "span");
                hiddenSpan.className = "hiddenColon";
                hiddenSpan.style.display = "none";
                // Hide the last colon by using span element.
                // I.e., label<span style="display:none;">:</span>
                this.wrapChar(hiddenSpan, labelText.length);
                colonHidden = true;
              }
              // If end is space(U+20),
              // we should not add space before parentheses.
              var endIsSpace = false;
              if (/ $/.test(labelText)) {
                endIsSpace = true;
              }
              if (this.mInsertSeparator && !endIsSpace)
                afterLabel.textContent = " (";
              else
                afterLabel.textContent = "(";
              span.textContent = accessKey.toUpperCase();
              afterLabel.appendChild(span);
              if (!colonHidden)
                afterLabel.appendChild(document.createTextNode(")"));
              else
                afterLabel.appendChild(document.createTextNode("):"));
              return;
            }
            this.wrapChar(span, accessKeyIndex);
          ]]>
        </body>
      </method>

      <method name="wrapChar">
        <parameter name="element"/>
        <parameter name="index"/>
        <body>
          <![CDATA[
             var treeWalker = document.createTreeWalker(this,
                                                        NodeFilter.SHOW_TEXT,
                                                        null,
                                                        true);
             var node = treeWalker.nextNode();
             while (index >= node.length) {
               index -= node.length;
               node = treeWalker.nextNode();
             }
             if (index) {
               node = node.splitText(index);
             }
             node.parentNode.insertBefore(element, node);
             if (node.length > 1) {
               node.splitText(1);
             }
             element.appendChild(node);
          ]]>
        </body>
      </method>

      <method name="mergeElement">
        <parameter name="element"/>
        <body>
          <![CDATA[
            if (element.previousSibling instanceof Text) {
              element.previousSibling.appendData(element.textContent)
            }
            else {
              element.parentNode.insertBefore(element.firstChild, element);
            }
            element.parentNode.removeChild(element);
          ]]>
        </body>
      </method>

      <field name="mUnderlineAccesskey">
        !/Mac/.test(navigator.platform)
      </field>
      <field name="mInsertSeparator">true</field>
      <field name="mAlwaysAppendAccessKey">false</field>

      <property name="accessKey">
        <getter>
          <![CDATA[
            var accessKey = null;
            var labeledEl = this.labeledControlElement;
            if (labeledEl) {
              accessKey = labeledEl.getAttribute('accesskey');
            }
            if (!accessKey) {
              accessKey = this.getAttribute('accesskey');
            }
            return accessKey ? accessKey[0] : null;
          ]]>
        </getter>
        <setter>
          <![CDATA[
            // If this label already has an accesskey attribute store it here as well
            if (this.hasAttribute('accesskey')) {
              this.setAttribute('accesskey', val);
            }
            var control = this.labeledControlElement;
            if (control) {
              control.setAttribute('accesskey', val);
            }
            this.formatAccessKey();
            return val;
          ]]>
        </setter>
      </property>

      <property name="labeledControlElement" readonly="true"
                onget="var control = this.control; return control ? document.getElementById(control) : null;" />

      <property name="control" onget="return this.getAttribute('control');">
        <setter>
          <![CDATA[
            var control = this.labeledControlElement;
            if (control) {
              control.labelElement = null; // No longer pointed to be this label
            }
            this.setAttribute('control', val);
            this.formatAccessKey();
            return val;
          ]]>
        </setter>
      </property>

    </implementation>

    <handlers>
      <handler event="click" action="if (this.disabled) return;
                                     var controlElement = this.labeledControlElement;
                                     if(controlElement)
                                       controlElement.focus();
                                    "/>
    </handlers>
  </binding>

  <binding id="text-link" extends="chrome://global/content/bindings/text.xml#text-label">
    <implementation implements="nsIAccessibleProvider">
      <property name="accessibleType" readonly="true">
        <getter>
          <![CDATA[
            return Components.interfaces.nsIAccessibleProvider.XULLink;
          ]]>
        </getter>
      </property>
      <property name="href" onget="return this.getAttribute('href');"
                            onset="this.setAttribute('href', val); return val;" />
      <method name="open">
        <parameter name="aEvent"/>
        <body>
        <![CDATA[
          var href = this.href;
          if (!href || this.disabled || aEvent.getPreventDefault())
            return;

          var uri = null;
          try {
            const nsISSM = Components.interfaces.nsIScriptSecurityManager;
            const secMan =
                     Components.classes["@mozilla.org/scriptsecuritymanager;1"]
                               .getService(nsISSM);

            const ioService =
                     Components.classes["@mozilla.org/network/io-service;1"]
                               .getService(Components.interfaces.nsIIOService);

            uri = ioService.newURI(href, null, null);

            var nullPrincipal =
              Components.classes["@mozilla.org/nullprincipal;1"]
                        .createInstance(Components.interfaces.nsIPrincipal);
            try {
              secMan.checkLoadURIWithPrincipal(nullPrincipal, uri,
                                               nsISSM.DISALLOW_INHERIT_PRINCIPAL)
            }
            catch (ex) {
              var msg = "Error: Cannot open a " + uri.scheme + ": link using \
                         the text-link binding.";
              Components.utils.reportError(msg);
              return;
            }

            const cID = "@mozilla.org/uriloader/external-protocol-service;1";
            const nsIEPS = Components.interfaces.nsIExternalProtocolService;
            var protocolSvc = Components.classes[cID].getService(nsIEPS);

            // if the scheme is not an exposed protocol, then opening this link
            // should be deferred to the system's external protocol handler
            if (!protocolSvc.isExposedProtocol(uri.scheme)) {
              protocolSvc.loadUrl(uri);
              aEvent.preventDefault()
              return;
            }

          }
          catch (ex) {
            Components.utils.reportError(ex);
          }

          // otherwise, fall back to opening the anchor directly
          var win = window;
          if (window instanceof Components.interfaces.nsIDOMChromeWindow) {
            while (win.opener && !win.opener.closed)
              win = win.opener;
          }

          if (uri)
            win.open(uri.spec);
          else
            win.open(href);

          aEvent.preventDefault();
        ]]>
        </body>
      </method>
    </implementation>

    <handlers>
      <handler event="click" phase="capturing" button="0" action="this.open(event)"/>
      <handler event="keypress" preventdefault="true" keycode="VK_ENTER"  action="this.click()" />
      <handler event="keypress" preventdefault="true" keycode="VK_RETURN" action="this.click()" />
    </handlers>
  </binding>

</bindings>
