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<?xml version="1.0"?>
<!-- This Source Code Form is subject to the terms of the Mozilla Public
   - License, v. 2.0. If a copy of the MPL was not distributed with this
   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->


<bindings id="buttonBindings"
   xmlns="http://www.mozilla.org/xbl"
   xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
   xmlns:xbl="http://www.mozilla.org/xbl">

  <binding id="button-base" extends="chrome://global/content/bindings/general.xml#basetext">
    <implementation implements="nsIDOMXULButtonElement">
      <property name="type"
                onget="return this.getAttribute('type');"
                onset="this.setAttribute('type', val); return val;"/>

      <property name="dlgType"
                onget="return this.getAttribute('dlgtype');"
                onset="this.setAttribute('dlgtype', val); return val;"/>

      <property name="group"
                onget="return this.getAttribute('group');"
                onset="this.setAttribute('group', val); return val;"/>

      <property name="open" onget="return this.hasAttribute('open');">
        <setter><![CDATA[
          if (this.hasMenu()) {
            this.openMenu(val);
          } else if (val) {
            // Fall back to just setting the attribute
            this.setAttribute("open", "true");
          } else {
            this.removeAttribute("open");
          }
          return val;
        ]]></setter>
      </property>

      <property name="checked" onget="return this.hasAttribute('checked');">
        <setter><![CDATA[
          if (this.type == "radio" && val) {
            var sibs = this.parentNode.getElementsByAttribute("group", this.group);
            for (var i = 0; i < sibs.length; ++i)
              sibs[i].removeAttribute("checked");
          }

          if (val)
            this.setAttribute("checked", "true");
          else
            this.removeAttribute("checked");

          return val;
        ]]></setter>
      </property>

      <method name ="filterButtons">
        <parameter name="node"/>
        <body>
        <![CDATA[
          // if the node isn't visible, don't descend into it.
          var cs = node.ownerGlobal.getComputedStyle(node);
          if (cs.visibility != "visible" || cs.display == "none") {
            return NodeFilter.FILTER_REJECT;
          }
          // but it may be a popup element, in which case we look at "state"...
          if (cs.display == "-moz-popup" && node.state != "open") {
            return NodeFilter.FILTER_REJECT;
          }
          // OK - the node seems visible, so it is a candidate.
          if (node.localName == "button" && node.accessKey && !node.disabled)
            return NodeFilter.FILTER_ACCEPT;
          return NodeFilter.FILTER_SKIP;
        ]]>
        </body>
      </method>

      <method name="fireAccessKeyButton">
        <parameter name="aSubtree"/>
        <parameter name="aAccessKeyLower"/>
        <body>
        <![CDATA[
          var iterator = aSubtree.ownerDocument.createTreeWalker(aSubtree,
                                                                 NodeFilter.SHOW_ELEMENT,
                                                                 this.filterButtons);
          while (iterator.nextNode()) {
            var test = iterator.currentNode;
            if (test.accessKey.toLowerCase() == aAccessKeyLower &&
                !test.disabled && !test.collapsed && !test.hidden) {
              test.focus();
              test.click();
              return true;
            }
          }
          return false;
        ]]>
        </body>
      </method>

      <method name="_handleClick">
        <body>
        <![CDATA[
          if (!this.disabled) {
            if (this.type == "checkbox") {
              this.checked = !this.checked;
            } else if (this.type == "radio") {
              this.checked = true;
            }
          }
        ]]>
        </body>
      </method>
    </implementation>

    <handlers>
      <!-- While it would seem we could do this by handling oncommand, we can't
           because any external oncommand handlers might get called before ours,
           and then they would see the incorrect value of checked. Additionally
           a command attribute would redirect the command events anyway.-->
      <handler event="click" button="0" action="this._handleClick();"/>
      <handler event="keypress" key=" ">
      <![CDATA[
        this._handleClick();
        // Prevent page from scrolling on the space key.
        event.preventDefault();
      ]]>
      </handler>

      <handler event="keypress">
      <![CDATA[
        if (this.hasMenu()) {
          if (this.open)
            return;
        } else {
          if (event.keyCode == KeyEvent.DOM_VK_UP ||
              (event.keyCode == KeyEvent.DOM_VK_LEFT &&
                document.defaultView.getComputedStyle(this.parentNode)
                        .direction == "ltr") ||
              (event.keyCode == KeyEvent.DOM_VK_RIGHT &&
                document.defaultView.getComputedStyle(this.parentNode)
                        .direction == "rtl")) {
            event.preventDefault();
            window.document.commandDispatcher.rewindFocus();
            return;
          }

          if (event.keyCode == KeyEvent.DOM_VK_DOWN ||
              (event.keyCode == KeyEvent.DOM_VK_RIGHT &&
                document.defaultView.getComputedStyle(this.parentNode)
                        .direction == "ltr") ||
              (event.keyCode == KeyEvent.DOM_VK_LEFT &&
                document.defaultView.getComputedStyle(this.parentNode)
                        .direction == "rtl")) {
            event.preventDefault();
            window.document.commandDispatcher.advanceFocus();
            return;
          }
        }

        if (event.keyCode || event.charCode <= 32 || event.altKey ||
            event.ctrlKey || event.metaKey)
          return; // No printable char pressed, not a potential accesskey

        // Possible accesskey pressed
        var charPressedLower = String.fromCharCode(event.charCode).toLowerCase();

        // If the accesskey of the current button is pressed, just activate it
        if (this.accessKey.toLowerCase() == charPressedLower) {
          this.click();
          return;
        }

        // Search for accesskey in the list of buttons for this doc and each subdoc
        // Get the buttons for the main document and all sub-frames
        for (var frameCount = -1; frameCount < window.top.frames.length; frameCount++) {
          var doc = (frameCount == -1) ? window.top.document :
            window.top.frames[frameCount].document;
          if (this.fireAccessKeyButton(doc.documentElement, charPressedLower))
            return;
        }

        // Test anonymous buttons
        var dlg = window.top.document;
        var buttonBox = dlg.getAnonymousElementByAttribute(dlg.documentElement,
                                                         "anonid", "buttons");
        if (buttonBox)
          this.fireAccessKeyButton(buttonBox, charPressedLower);
      ]]>
      </handler>
    </handlers>
  </binding>

  <binding id="button" display="xul:button"
           extends="chrome://global/content/bindings/button.xml#button-base">
    <content>
      <children includes="observes|template|menupopup|panel|tooltip"/>
      <xul:hbox class="box-inherit button-box" xbl:inherits="align,dir,pack,orient"
                align="center" pack="center" flex="1" anonid="button-box">
        <xul:image class="button-icon" xbl:inherits="src=image"/>
        <xul:label class="button-text" xbl:inherits="value=label,accesskey,crop,highlightable"/>
        <xul:label class="button-highlightable-text" xbl:inherits="xbl:text=label,accesskey,crop,highlightable"/>
      </xul:hbox>
    </content>
  </binding>

  <binding id="menu" display="xul:menu"
           extends="chrome://global/content/bindings/button.xml#button">
    <content>
      <children includes="observes|template|menupopup|panel|tooltip"/>
      <xul:hbox class="box-inherit button-box" xbl:inherits="align,dir,pack,orient"
                align="center" pack="center" flex="1">
        <xul:hbox class="box-inherit" xbl:inherits="align,dir,pack,orient"
                  align="center" pack="center" flex="1">
          <xul:image class="button-icon" xbl:inherits="src=image"/>
          <xul:label class="button-text" xbl:inherits="value=label,accesskey,crop"/>
        </xul:hbox>
        <xul:dropmarker class="button-menu-dropmarker" xbl:inherits="open,disabled,label"/>
      </xul:hbox>
    </content>

    <handlers>
      <handler event="keypress" keycode="VK_RETURN" action="this.open = true;"/>
      <handler event="keypress" key=" ">
      <![CDATA[
        this.open = true;
        // Prevent page from scrolling on the space key.
        event.preventDefault();
      ]]>
      </handler>
    </handlers>
  </binding>
</bindings>