<?xml version="1.0" encoding="UTF-8"?>
<!-- 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/. -->

<!DOCTYPE overlay SYSTEM "chrome://calendar/locale/calendar.dtd">

<bindings id="calendar-list-tree-bindings"
          xmlns="http://www.mozilla.org/xbl"
          xmlns:xbl="http://www.mozilla.org/xbl"
          xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
  <binding id="full-calendar-list-tree" extends="#calendar-list-tree">
    <!--
      - This binding implements a full calendar list, that automatically adds
      - and removes calendars when a calendar is registered or unregistered.
      -->
    <implementation>
      <constructor><![CDATA[
        Components.utils.import("resource://calendar/modules/calUtils.jsm");
        let calMgr = cal.getCalendarManager();
        calMgr.addObserver(this.calMgrObserver);

      ]]></constructor>
      <destructor><![CDATA[
        let calMgr = cal.getCalendarManager();
        calMgr.removeObserver(this.calMgrObserver);
        this.calMgrObserver.listTree = null;
      ]]></destructor>

      <field name="mAddingFromComposite">false</field>

      <property name="compositeCalendar">
        <getter><![CDATA[
          if (!this.mCompositeCalendar) {
              throw Components.Exception("Calendar list has no composite calendar yet",
                                         Components.results.NS_ERROR_NOT_INITIALIZED);
          }
          return this.mCompositeCalendar;
        ]]></getter>
        <setter><![CDATA[
          this.mCompositeCalendar = val;
          this.mCompositeCalendar.addObserver(this.compositeObserver);

          // Now that we have a composite calendar, we can get all calendars
          // from the calendar manager.
          this.mAddingFromComposite = true;
          let calendars = sortCalendarArray(getCalendarManager().getCalendars({}));
          calendars.forEach(this.addCalendar, this);
          this.mAddingFromComposite = false;

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

      <property name="calendars">
        <getter><![CDATA[
          return this.mCalendarList;
        ]]></getter>
        <setter><![CDATA[
          // Setting calendars externally is not wanted. This is done internally
          // in the compositeCalendar setter.
          throw Components.Exception("Seting calendars on type='full' is not supported",
                                     Components.results.NS_ERROR_NOT_IMPLEMENTED);
        ]]></setter>
      </property>

      <field name="calMgrObserver"><![CDATA[
      ({ listTree: this,

        QueryInterface: XPCOMUtils.generateQI([Components.interfaces.calICalendarManagerObserver]),

        // calICalendarManagerObserver
        onCalendarRegistered: function cMO_onCalendarRegistered(aCalendar) {
            this.listTree.addCalendar(aCalendar);
            let composite = this.listTree.compositeCalendar;
            let inComposite = aCalendar.getProperty(composite.prefPrefix +
                                                    "-in-composite");
            if ((inComposite === null) || inComposite) {
                composite.addCalendar(aCalendar);
            }
        },

        onCalendarUnregistering: function cMO_onCalendarUnregistering(aCalendar) {
            this.listTree.removeCalendar(aCalendar);
        },

        onCalendarDeleting: function cMO_onCalendarDeleting(aCalendar) {
            // Now that the calendar is unregistered, update the commands to
            // make sure that New Event/Task commands are correctly
            // enabled/disabled.
            document.commandDispatcher.updateCommands("calendar_commands");
        }
      })
      ]]></field>
      <field name="compositeObserver"><![CDATA[
      ({ listTree: this,

        QueryInterface: XPCOMUtils.generateQI([Components.interfaces.calICompositeObserver,
                                               Components.interfaces.calIObserver]),

        // calICompositeObserver
        onCalendarAdded: function onCalendarAdded(aCalendar) {
            // Make sure the checkbox state is updated
            this.listTree.updateCalendar(aCalendar);
        },

        onCalendarRemoved: function onCalendarRemoved(aCalendar) {
            // Make sure the checkbox state is updated
            this.listTree.updateCalendar(aCalendar);
        },

        onDefaultCalendarChanged: function cMO_onDefaultCalendarChanged(aCalendar) {
        },

        // calIObserver
        onStartBatch: function cO_onStartBatch() { },
        onEndBatch: function cO_onEndBatch() { },
        onLoad: function cO_onLoad() { },

        onAddItem: function cO_onAddItem(aItem) {
            if (aItem.calendar.type != "caldav") {
                this.listTree.ensureCalendarVisible(aItem.calendar);
            }
        },
        onModifyItem: function cO_onModifyItem(aNewItem, aOldItem) {
            if (aNewItem.calendar.type != "caldav") {
                this.listTree.ensureCalendarVisible(aNewItem.calendar);
            }
        },
        onDeleteItem: function cO_onDeleteItem(aDeletedItem) { },
        onError: function cO_onError(aCalendar, aErrNo, aMessage) { },

        onPropertyChanged: function cO_onPropertyChanged(aCalendar,
                                                         aName,
                                                         aValue,
                                                         aOldValue) {
            switch (aName) {
                case "disabled":
                case "readOnly":
                    document.commandDispatcher.updateCommands("calendar_commands");
                    break;
            }
        },

        onPropertyDeleting: function cO_onPropertyDeleting(aCalendar,
                                                            aName) {
        }
      })
      ]]></field>
    </implementation>
    <handlers>
      <handler event="dblclick"><![CDATA[
        var col = {};
        var calendar = this.getCalendarFromEvent(event, col);
        if (event.button != 0 ||
            (col.value && col.value.element &&
             col.value.element.getAttribute("anonid") == "checkbox-treecol")) {
            // Only left clicks that are not on the checkbox column
            return;
        }
        if (calendar) {
            openCalendarProperties(calendar);
        } else {
            openCalendarWizard();
        }
      ]]></handler>
    </handlers>
  </binding>

  <binding id="calendar-list-tree">
    <content>
      <xul:tree anonid="tree"
                xbl:inherits="hidecolumnpicker"
                hidecolumnpicker="true"
                seltype="single"
                flex="1">
        <xul:treecols anonid="treecols"
                      xbl:inherits="hideheader"
                      hideheader="true">
          <xul:treecol anonid="checkbox-treecol"
                       xbl:inherits="cycler,hideheader"
                       cycler="true"
                       hideheader="true"
                       width="17"/>
          <xul:treecol anonid="color-treecol"
                       xbl:inherits="cycler,hideheader"
                       hideheader="true"
                       width="16"/>
          <xul:treecol anonid="calendarname-treecol"
                       xbl:inherits="cycler,hideheader"
                       hideheader="true"
                       label="&calendar.unifinder.tree.calendarname.label;"
                       flex="1"/>
          <xul:treecol anonid="status-treecol"
                       xbl:inherits="cycler,hideheader"
                       hideheader="true"
                       width="18"/>
          <children includes="treecol"/>
          <xul:treecol anonid="scrollbar-spacer"
                       xbl:inherits="cycler,hideheader"
                       fixed="true"
                       hideheader="true">
            <!-- This is a very elegant workaround to make sure the last column
                 is not covered by the scrollbar in case of an overflow. This
                 treecol needs to be here last -->
            <xul:slider anonid="scrollbar-slider" orient="vertical"/>
          </xul:treecol>
        </xul:treecols>
        <xul:treechildren anonid="treechildren"
                          xbl:inherits="tooltip=childtooltip,context=childcontext"
                          tooltip="_child"
                          context="_child"
                          ondragstart="onDragStart(event);"
                          onoverflow="displayScrollbarSpacer(true)"
                          onunderflow="displayScrollbarSpacer(false)">
          <children includes="tooltip|menupopup"/>
        </xul:treechildren>
      </xul:tree>
    </content>
    <implementation implements="nsITreeView">

      <field name="mCalendarList">[]</field>
      <field name="mCompositeCalendar">null</field>
      <field name="tree">null</field>
      <field name="treebox">null</field>
      <field name="ruleCache">new Object()</field>
      <field name="mCachedSheet">null</field>


      <constructor><![CDATA[
        Components.utils.import("resource://calendar/modules/calUtils.jsm");
        Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
        this.tree.view = this;
      ]]></constructor>
      <destructor><![CDATA[
        // Clean up the calendar manager observers. Do not use removeCalendar
        // here since that will remove the calendar from the composite calendar.
        for each (let calendar in this.mCalendarList) {
            calendar.removeObserver(this.calObserver);
        }

        this.tree.view = null;
        this.calObserver.listTree = null;

        if (this.mCompositeCalendar) {
            this.mCompositeCalendar.removeObserver(this.compositeObserver);
        }
      ]]></destructor>

      <field name="calObserver"><![CDATA[
      ({ listTree: this,

        QueryInterface: XPCOMUtils.generateQI([Components.interfaces.calIObserver]),

        // calIObserver. Note that each registered calendar uses this observer
        onStartBatch: function cMO_onStartBatch() { },
        onEndBatch: function cMO_onEndBatch() { },
        onLoad: function cMO_onLoad() { },

        onAddItem: function cMO_onAddItem(aItem) { },
        onModifyItem: function cMO_onModifyItem(aNewItem, aOldItem) { },
        onDeleteItem: function cMO_onDeleteItem(aDeletedItem) { },
        onError: function cMO_onError(aCalendar, aErrNo, aMessage) { },

        onPropertyChanged: function cMO_onPropertyChanged(aCalendar,
                                                          aName,
                                                          aValue,
                                                          aOldValue) {
            switch (aName) {
                case "color":
                    // TODO See other TODO in this file about updateStyleSheetForViews
                    if ("updateStyleSheetForViews" in window) {
                        updateStyleSheetForViews(aCalendar);
                    }
                    this.listTree.updateCalendarColor(aCalendar);
                    // Fall through, update item in any case
                case "name":
                case "currentStatus":
                case "readOnly":
                case "disabled":
                    this.listTree.updateCalendar(aCalendar);
                    // Fall through, update commands in any cases.
            }
        },

        onPropertyDeleting: function cMO_onPropertyDeleting(aCalendar,
                                                            aName) {
            // Since the old value is not used directly in onPropertyChanged,
            // but should not be the same as the value, set it to a different
            // value.
            this.onPropertyChanged(aCalendar, aName, null, null);
        }
      })
      ]]></field>

      <field name="compositeObserver"><![CDATA[
      ({ listTree: this,

        QueryInterface: XPCOMUtils.generateQI([Components.interfaces.calICompositeObserver]),

        // calICompositeObserver
        onCalendarAdded: function onCalendarAdded(aCalendar) {
            // Make sure the checkbox state is updated
            this.listTree.updateCalendar(aCalendar);
        },

        onCalendarRemoved: function onCalendarRemoved(aCalendar) {
            // Make sure the checkbox state is updated
            this.listTree.updateCalendar(aCalendar);
        },

        onDefaultCalendarChanged: function cMO_onDefaultCalendarChanged(aCalendar) {
        }
      })
      ]]></field>

      <property name="treechildren"
                readonly="true"
                onget="return document.getAnonymousElementByAttribute(this, 'anonid', 'treechildren')"/>
      <property name="tree"
                readonly="true"
                onget="return document.getAnonymousElementByAttribute(this, 'anonid', 'tree')"/>


      <property name="sheet" readonly="true">
        <getter><![CDATA[
          if (!this.mCachedSheet) {
              for each (let sheet in document.styleSheets) {
                  if (sheet.href == "chrome://calendar/skin/calendar-management.css") {
                      this.mCachedSheet = sheet;
                      break;
                  }
              }
              if (!this.mCachedSheet) {
                cal.ERROR("Could not find calendar-management.css, needs to be added to " +
                          window.document.title + "'s stylesheets");
              }
          }

          return this.mCachedSheet;
        ]]></getter>
      </property>

      <property name="calendars">
        <getter><![CDATA[
          return this.mCalendarList;
        ]]></getter>
        <setter><![CDATA[
          this.mCalendarList = val;
          this.mCalendarList.forEach(this.addCalendar, this);
          return this.mCalendarList;
        ]]></setter>
      </property>

      <property name="compositeCalendar">
        <getter><![CDATA[
          if (!this.mCompositeCalendar) {
              this.mCompositeCalendar =
                  Components.classes["@mozilla.org/calendar/calendar;1?type=composite"]
                            .createInstance(Components.interfaces.calICompositeCalendar);
          }

          return this.mCompositeCalendar;
        ]]></getter>
        <setter><![CDATA[
          if (this.mCompositeCalendar) {
              throw Components.Exception("A composite calendar has already been set",
                                         Components.results.NS_ERROR_ALREADY_INITIALIZED);
          }
          this.mCompositeCalendar = val;
          this.mCompositeCalendar.addObserver(this.compositeObserver);
          return val;
        ]]></setter>
      </property>

      <property name="sortOrder"
                readonly="true"
                onget="return this.mCalendarList.map(function(x) x.id);"/>
      <property name="selectedCalendars"
                readonly="true"
                onget="return this.compositeCalendar.getCalendars({});"/>
      <property name="allowDrag"
                onget="return (this.getAttribute('allowdrag') == 'true');"
                onset="return setBooleanAttribute(this, 'allowdrag', val);"/>
      <property name="writable"
                onget="return (this.getAttribute('writable') == 'true');"
                onset="return setBooleanAttribute(this, 'writable', val);"/>
      <property name="ignoreDisabledState"
                onget="return (this.getAttribute('ignoredisabledstate') == 'true');"
                onset="return setBooleanAttribute(this, 'ignoredisabledstate', val);"/>

      <method name="sortOrderChanged">
        <parameter name=""/>
        <body><![CDATA[
          if (this.mAddingFromComposite) {
              return;
          }
          let event = document.createEvent('Events');
          event.initEvent("SortOrderChanged", true, false);
          event.sortOrder = this.sortOrder
          this.dispatchEvent(event);

          let handler = this.getAttribute("onSortOrderChanged");
          if (handler) {
              // Call the given code in a function
              (new Function("event", handler))(event);
          }
        ]]></body>
      </method>
      <method name="displayScrollbarSpacer">
        <parameter name="aShouldDisplay"/>
        <body><![CDATA[
            let spacer = document.getAnonymousElementByAttribute(this, "anonid", "scrollbar-spacer");
            spacer.collapsed = !aShouldDisplay;
        ]]></body>
      </method>

      <method name="ensureCalendarVisible">
        <parameter name="aCalendar"/>
        <body><![CDATA[
          this.compositeCalendar.addCalendar(aCalendar);
        ]]></body>
      </method>

      <method name="getColumn">
        <parameter name="aAnonId"/>
        <body><![CDATA[
          let colElem = document.getAnonymousElementByAttribute(this, "anonid", aAnonId);
          return this.treebox.columns.getColumnFor(colElem);
        ]]></body>
      </method>

      <method name="findIndexById">
        <!--
          - Find the array index of the calendar with the passed id.
          -
          - @param aId           The calendar id to find an index for.
          - @return              The array index, or -1 if not found.
          -->
        <parameter name="aId"/>
        <body><![CDATA[
          for (var i = 0; i < this.mCalendarList.length; i++) {
              if (this.mCalendarList[i].id == aId) {
                  return i;
              }
          }
          return -1;
        ]]></body>
      </method>

      <method name="addCalendar">
        <!--
          - Add a calendar to the calendar list
          -
          - @param aCalendar     The calendar to add.
          -->
        <parameter name="aCalendar"/>
        <body><![CDATA[
          let composite = this.compositeCalendar;

          let initialSortOrderPos = aCalendar.getProperty("initialSortOrderPos");
          if (initialSortOrderPos != null && initialSortOrderPos < this.mCalendarList.length) {
              // Insert the calendar at the requested sort order position
              // and then discard the property
              this.mCalendarList.splice(initialSortOrderPos, 0, aCalendar);
              aCalendar.deleteProperty("initialSortOrderPos");
          } else {
              this.mCalendarList.push(aCalendar);
          }
          this.treebox.rowCountChanged(this.mCalendarList.length - 1, 1);

          if (!composite.defaultCalendar ||
              aCalendar.id == composite.defaultCalendar.id) {
              this.tree.view.selection.select(this.mCalendarList.length - 1);
          }

          this.updateCalendarColor(aCalendar);

          // TODO This should be done only once outside of this binding, but to
          // do that right, we need to have an easy way to register an observer
          // all calendar properties. This could be the calendar manager that
          // holds an observer on every calendar anyway, which would then use the
          // global observer service which clients can register with.
          if ("updateStyleSheetForViews" in window) {
              updateStyleSheetForViews(aCalendar);
          }

          // Watch the calendar for changes, i.e color.
          aCalendar.addObserver(this.calObserver);

          // Adding a calendar causes the sortorder to be changed.
          this.sortOrderChanged();
        ]]></body>
      </method>

      <method name="removeCalendar">
        <!--
          - Remove a calendar from the calendar list
          -
          - @param aCalendar     The calendar to remove.
          -->
        <parameter name="aCalendar"/>
        <body><![CDATA[
          let index = this.findIndexById(aCalendar.id);
          if (index < 0) {
              return;
          }

          this.mCalendarList.splice(index, 1);
          if (index == this.rowCount) {
              index--;
          }

          this.tree.view.selection.select(index + 1);
          this.treebox.rowCountChanged(index, -1);

          aCalendar.removeObserver(this.calObserver);

          // Make sure the calendar is removed from the composite calendar
          this.compositeCalendar.removeCalendar(aCalendar);

          // Remove the css style rule from the sheet.
          let sheet = this.sheet;
          for (let i = 0; i < sheet.cssRules.length; i++) {
              if (sheet.cssRules[i] == this.ruleCache[aCalendar.id]) {
                  sheet.deleteRule(i);
                  delete this.ruleCache[aCalendar.id];
                  break;
              }
          }

          this.sortOrderChanged();
        ]]></body>
      </method>

      <method name="updateCalendar">
        <!--
          - Update a calendar's tree row (to refresh the color and such)
          -
          - @param aCalendar     The calendar to update.
          -->
        <parameter name="aCalendar"/>
        <body><![CDATA[
          this.treebox.invalidateRow(this.findIndexById(aCalendar.id));
        ]]></body>
      </method>

      <method name="updateCalendarColor">
        <!--
          - Update a calendar's color rules.
          -
          - @param aCalendar     The calendar to update.
          -->
        <parameter name="aCalendar"/>
        <body><![CDATA[
          let color = aCalendar.getProperty("color") || "#a8c2e1";
          let sheet = this.sheet;
          if (!(aCalendar.id in this.ruleCache)) {
              let ruleString = "calendar-list-tree > tree > treechildren" +
                               "::-moz-tree-cell(color-treecol, id-"  +
                               aCalendar.id + ") {}";

              let ruleIndex = sheet.insertRule(ruleString, sheet.cssRules.length);
              this.ruleCache[aCalendar.id] = sheet.cssRules[ruleIndex];
          }
          this.ruleCache[aCalendar.id].style.backgroundColor = color;
        ]]></body>
      </method>

      <method name="getCalendarFromEvent">
        <!--
          - Get the calendar from the given DOM event. This can be a Mouse event or a
          - keyboard event.
          -
          - @param event     The DOM event to check
          - @param aCol      An out-object for the column id.
          - @param aRow      An out-object for the row index.
          -->
        <parameter name="event"/>
        <parameter name="aCol"/>
        <parameter name="aRow"/>
        <body><![CDATA[
          if (event.clientX && event.clientY) {
              // If we have a client point, get the row directly from the client
              // point.
              aRow = aRow || {};
              this.treebox.getCellAt(event.clientX,
                                     event.clientY,
                                     aRow,
                                     aCol || {},
                                     {});

          } else {
              // Otherwise, we can try to get the context calendar from the popupNode.
              if (document.popupNode && document.popupNode.contextCalendar) {
                  return document.popupNode.contextCalendar;
              }
          }
          return aRow && aRow.value > -1 && this.mCalendarList[aRow.value];
        ]]></body>
      </method>

      <method name="getCalendar">
        <!--
          - Get the calendar from a certain index.
          -
          - @param aIndex     The index to get the calendar for.
          -->
        <parameter name="aIndex"/>
        <body><![CDATA[
          let index = Math.max(0, Math.min(this.mCalendarList.length - 1, aIndex));
          return this.mCalendarList[index];
        ]]></body>
      </method>

      <!-- Implement nsITreeView -->
      <property name="rowCount"
                readonly="true"
                onget="return this.mCalendarList.length"/>

      <method name="getCellProperties">
        <parameter name="aRow"/>
        <parameter name="aCol"/>
        <parameter name="aProps"/>
        <body><![CDATA[
          try {
              this.getRowProperties(aRow, aProps);
              this.getColumnProperties(aCol, aProps);
          } catch (e) {
              // It seems errors in these functions are not shown, do this
              // explicitly.
              cal.ERROR("Error getting cell props: " + e);
          }
        ]]></body>
      </method>

      <method name="getRowProperties">
        <parameter name="aRow"/>
        <parameter name="aProps"/>
        <body><![CDATA[
          let calendar = this.getCalendar(aRow);
          let composite = this.compositeCalendar;

          // Set up the composite calendar status
          if (composite.getCalendarById(calendar.id)) {
              aProps.AppendElement(cal.getAtomFromService("checked"));
          } else {
              aProps.AppendElement(cal.getAtomFromService("unchecked"));
          }

          // Set up the calendar id
          aProps.AppendElement(cal.getAtomFromService("id-" + calendar.id));

          // Get the calendar color
          let color = (calendar.getProperty("color") || "").substr(1);

          // Set up the calendar color (background)
          let bgColorProp = "color-" + (color || "default");
          aProps.AppendElement(cal.getAtomFromService(bgColorProp));

          // Set a property to get the contrasting text color (foreground)
          let fgColorProp = cal.getContrastingTextColor(color || "a8c2e1");
          aProps.AppendElement(cal.getAtomFromService(fgColorProp));

          let currentStatus = calendar.getProperty("currentStatus");
          if (!Components.isSuccessCode(currentStatus)) {
              // 'readfailed' is supposed to "win" over 'readonly', meaning that
              // if reading from a calendar fails there is no further need to also display
              // information about 'readonly' status
              aProps.AppendElement(cal.getAtomFromService("readfailed"));
          } else if (calendar.readOnly) {
              aProps.AppendElement(cal.getAtomFromService("readonly"));
          }

          // Set up the disabled state
          if (!this.ignoreDisabledState && calendar.getProperty("disabled")) {
              aProps.AppendElement(cal.getAtomFromService("disabled"));
          } else {
              aProps.AppendElement(cal.getAtomFromService("enabled"));
          }
        ]]></body>
      </method>

      <method name="getColumnProperties">
        <parameter name="aCol"/>
        <parameter name="aProps"/>
        <body><![CDATA[
          // Workaround for anonymous treecols
          let colAtom = cal.getAtomFromService(aCol.element.getAttribute("anonid"));
          aProps.AppendElement(colAtom);
        ]]></body>
      </method>

      <method name="isContainer">
        <parameter name="aRow"/>
        <body><![CDATA[
          return false;
        ]]></body>
      </method>

      <method name="isContainerOpen">
        <parameter name="aRow"/>
        <body><![CDATA[
          return false;
        ]]></body>
      </method>

      <method name="isContainerEmpty">
        <parameter name="aRow"/>
        <body><![CDATA[
          return false;
        ]]></body>
      </method>

      <method name="isSeparator">
        <parameter name="aRow"/>
        <body><![CDATA[
          return false;
        ]]></body>
      </method>

      <method name="isSorted">
        <parameter name="aRow"/>
        <body><![CDATA[
          return false;
        ]]></body>
      </method>

      <method name="onDragStart">
        <!--
          - Initiate a drag operation for the calendar list. Can be used in the
          - dragstart handler.
          -
          - @param event     The DOM event containing drag information.
          -->
        <parameter name="event"/>
        <body><![CDATA[
          let calendar = this.getCalendarFromEvent(event);
          if (this.allowDrag && event.dataTransfer) {
              // Setting data starts a drag session, do this only if dragging
              // is enabled for this binding.
              event.dataTransfer.setData("application/x-moz-calendarID", calendar.id);
              event.dataTransfer.effectAllowed = "move";
          }
        ]]></body>
      </method>

      <method name="canDrop">
        <parameter name="aRow"/>
        <parameter name="aOrientation"/>
        <body><![CDATA[
          let dragSession = cal.getDragService().getCurrentSession();
          let dataTransfer = dragSession && dragSession.dataTransfer;
          if (!this.allowDrag || !dataTransfer) {
              // If dragging is not allowed or there is no data transfer then
              // we can't drop (i.e dropping a file on the calendar list).
              return false;
          }

          let dragCalId = dataTransfer.getData("application/x-moz-calendarID");

          return (aOrientation != Components.interfaces.nsITreeView.DROP_ON &&
                  dragCalId != null);
        ]]></body>
      </method>

      <method name="drop">
        <parameter name="aRow"/>
        <parameter name="aOrientation"/>
        <body><![CDATA[
          let dragSession = cal.getDragService().getCurrentSession();
          let dataTransfer = dragSession.dataTransfer;
          let dragCalId = dataTransfer &&
                          dataTransfer.getData("application/x-moz-calendarID");
          if (!this.allowDrag || !dataTransfer || !dragCalId) {
              return false;
          }

          let oldIndex = -1;
          for (let i = 0; i < this.mCalendarList.length; i++) {
              if (this.mCalendarList[i].id == dragCalId) {
                  oldIndex = i;
                  break;
              }
          }
          if (oldIndex < 0) {
              return false;
          }

          // If no row is specified (-1), then assume append.
          let row = (aRow < 0 ? this.mCalendarList.length - 1 : aRow);
          let targetIndex = row + Math.max(0, aOrientation);

          // We don't need to move if the target row has the same index as the old
          // row. The same goes for dropping after the row before the old row or
          // before the row after the old row. Think about it :-)
          if (aRow != oldIndex && row + aOrientation != oldIndex) {
              // Add the new one, remove the old one.
              this.mCalendarList.splice(targetIndex, 0, this.mCalendarList[oldIndex]);
              this.mCalendarList.splice(oldIndex + (oldIndex > targetIndex ? 1 : 0), 1);

              // Invalidate the tree rows between the old item and the new one.
              if (oldIndex < targetIndex) {
                  this.treebox.invalidateRange(oldIndex, targetIndex);
              } else {
                  this.treebox.invalidateRange(targetIndex, oldIndex);
              }

              // Fire event
              this.sortOrderChanged();
          }
          return true;
        ]]></body>
      </method>

      <method name="foreignDrop">
        <!--
          - This function can be used by other nodes to simulate dropping on the
          - tree. This can be used for example on the tree header so that the row
          - will be inserted before the first visible row. The event client
          - coordinate are used to determine if the row should be dropped before the
          - first row (above treechildren) or below the last visible row (below top
          - of treechildren).
          -
          - @param event     The DOM drop event.
          - @return          Boolean indicating if the drop succeeded.
          -
          -->
        <parameter name="event"/>
        <body><![CDATA[
          let hasDropped;
          if (event.clientY < this.tree.boxObject.y) {
              hasDropped = this.drop(this.treebox.getFirstVisibleRow(), -1);
          } else {
              hasDropped = this.drop(this.treebox.getLastVisibleRow(), 1);
          }
          if (hasDropped) {
              event.preventDefault();
          }
          return hasDropped;
        ]]></body>
      </method>

      <method name="foreignCanDrop">
        <!--
          - Similar function to foreignCanDrop but for the dragenter event
          - @see ::foreignDrop
          -->
        <parameter name="event"/>
        <body><![CDATA[
          // The dragenter/dragover events expect false to be returned when
          // dropping is allowed, therefore we return !canDrop.
          if (event.clientY < this.tree.boxObject.y) {
              return !this.canDrop(this.treebox.getFirstVisibleRow(), -1);
          } else {
              return !this.canDrop(this.treebox.getLastVisibleRow(), 1);
          }
        ]]></body>
      </method>

      <method name="getParentIndex">
        <parameter name="aRow"/>
        <body><![CDATA[
          return -1;
        ]]></body>
      </method>

      <method name="hasNextSibling">
        <parameter name="aRow"/>
        <parameter name="aAfterIndex"/>
        <body><![CDATA[
        ]]></body>
      </method>

      <method name="getLevel">
        <parameter name="aRow"/>
        <body><![CDATA[
          return 0;
        ]]></body>
      </method>

      <method name="getImageSrc">
        <parameter name="aRow"/>
        <body><![CDATA[
        ]]></body>
      </method>

      <method name="getProgressMode">
        <parameter name="aRow"/>
        <parameter name="aCol"/>
        <body><![CDATA[
        ]]></body>
      </method>

      <method name="getCellValue">
        <parameter name="aRow"/>
        <parameter name="aCol"/>
        <body><![CDATA[
          let calendar = this.getCalendar(aRow);
          let composite = this.compositeCalendar;

          switch (aCol.element.getAttribute("anonid")) {
              case "checkbox-treecol":
                  return composite.getCalendarById(calendar.id) ? "true" : "false";
              case "status-treecol":
                  // The value of this cell shows the calendar readonly state
                  return (calendar.readOnly ? "true" : "false");
          }
          return null;
        ]]></body>
      </method>

      <method name="getCellText">
        <parameter name="aRow"/>
        <parameter name="aCol"/>
        <body><![CDATA[
          let calendar = this.getCalendar(aRow);

          switch (aCol.element.getAttribute("anonid")) {
              case "calendarname-treecol":
                  return this.getCalendar(aRow).name;
          }
          return "";
        ]]></body>
      </method>

      <method name="setTree">
        <parameter name="aTreeBox"/>
        <body><![CDATA[
          this.treebox = aTreeBox;
        ]]></body>
      </method>

      <method name="toggleOpenState">
        <parameter name="aRow"/>
        <body><![CDATA[
        ]]></body>
      </method>

      <method name="cycleHeader">
        <parameter name="aCol"/>
        <body><![CDATA[
        ]]></body>
      </method>

      <method name="cycleCell">
        <parameter name="aRow"/>
        <parameter name="aCol"/>
        <body><![CDATA[
          let calendar = this.getCalendar(aRow);
          let composite = this.compositeCalendar;

          switch (aCol.element.getAttribute("anonid")) {
              case "checkbox-treecol":
                try {
                    composite.startBatch();
                    if (composite.getCalendarById(calendar.id)) {
                        composite.removeCalendar(calendar);
                    } else {
                        composite.addCalendar(calendar);
                    }
                } finally {
                    composite.endBatch();
                }
                break;
          }
          this.treebox.invalidateRow(aRow);
        ]]></body>
      </method>

      <method name="isEditable">
        <parameter name="aRow"/>
        <parameter name="aCol"/>
        <body><![CDATA[
          return false;
        ]]></body>
      </method>

      <method name="setCellValue">
        <parameter name="aRow"/>
        <parameter name="aCol"/>
        <parameter name="aValue"/>
        <body><![CDATA[
          let calendar = this.getCalendar(aRow);
          let composite = this.compositeCalendar;

          switch (aCol.element.getAttribute("anonid")) {
              case "checkbox-treecol":
                  if (aValue == "true") {
                      composite.addCalendar(calendar);
                  } else {
                      composite.removeCalendar(calendar);
                  }
                  break;
              default:
                  return null;
          }
          return aValue;
        ]]></body>
      </method>

      <method name="setCellText">
        <parameter name="aRow"/>
        <parameter name="aCol"/>
        <parameter name="aValue"/>
        <body><![CDATA[
        ]]></body>
      </method>

      <method name="performAction">
        <parameter name="aAction"/>
        <body><![CDATA[
        ]]></body>
      </method>

      <method name="performActionOnRow">
        <parameter name="aAction"/>
        <parameter name="aRow"/>
        <body><![CDATA[
        ]]></body>
      </method>

      <method name="performActionOnCell">
        <parameter name="aAction"/>
        <parameter name="aRow"/>
        <parameter name="aCol"/>
        <body><![CDATA[
        ]]></body>
      </method>
    </implementation>
    <handlers>
      <handler event="select"><![CDATA[
        this.compositeCalendar.defaultCalendar = this.getCalendar(this.tree.currentIndex);
      ]]></handler>
      <handler event="keypress" keycode="VK_DELETE"><![CDATA[
        if (this.writable) {
            promptDeleteCalendar(this.compositeCalendar.defaultCalendar);
            event.preventDefault();
        }
      ]]></handler>
      <!-- use key=" " since keycode="VK_SPACE" doesn't work -->
      <handler event="keypress" key=" "><![CDATA[
        if (this.tree.currentIndex > -1) {
            this.cycleCell(this.tree.currentIndex, this.getColumn("checkbox-treecol"));
            event.preventDefault();
        }
      ]]></handler>
      <handler event="keypress" keycode="VK_DOWN" modifiers="control"><![CDATA[
        if (!this.allowDrag) {
          return;
        }

        let ci = this.tree.currentIndex;

        if (ci < this.mCalendarList.length - 1) {
            this.mCalendarList.splice(ci + 1, 0, this.mCalendarList.splice(ci, 1)[0]);
            this.treebox.invalidateRange(ci, ci + 1);

            if (this.tree.view.selection.isSelected(ci)) {
                this.tree.view.selection.toggleSelect(ci);
                this.tree.view.selection.toggleSelect(ci + 1);
            }
            if (this.tree.view.selection.currentIndex == ci) {
                this.tree.view.selection.currentIndex = ci + 1;
            }

            // Fire event
            this.sortOrderChanged();
        }
        // Don't call the default <key> handler.
        event.preventDefault();
      ]]></handler>
      <handler event="keypress" keycode="VK_UP" modifiers="control"><![CDATA[
        if (!this.allowDrag) {
          return;
        }

        let ci = this.tree.currentIndex;
        if (ci > 0) {
            this.mCalendarList.splice(ci - 1, 0, this.mCalendarList.splice(ci, 1)[0]);
            this.treebox.invalidateRange(ci - 1, ci);

            if (this.tree.view.selection.isSelected(ci)) {
                this.tree.view.selection.toggleSelect(ci);
                this.tree.view.selection.toggleSelect(ci - 1);
            }
            if (this.tree.view.selection.currentIndex == ci) {
                this.tree.view.selection.currentIndex = ci - 1;
            }

            // Fire event
            this.sortOrderChanged();
        }
        // Don't call the default <key> handler.
        event.preventDefault();
      ]]></handler>
    </handlers>
  </binding>
</bindings>
