Dactyloidae/mailnews/compose/content/mailComposeEditorOverlay.xul

<?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/. -->

<!DOCTYPE window SYSTEM "chrome://messenger/locale/messengercompose/mailComposeEditorOverlay.dtd" >

<overlay id="mailComposeEditorOverlay"
         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

  <script type="application/javascript">
  <![CDATA[
    Components.utils.import("resource://gre/modules/Services.jsm");

    var gMsgCompProcessLink = false;
    var gMsgCompInputElement = null;
    var gMsgCompPrevInputValue = null;
    var gMsgCompPrevMozDoNotSendAttribute;
    var gMsgCompAttachSourceElement = null;

    function OnLoadOverlay()
    {
      gMsgCompAttachSourceElement = document.getElementById("AttachSourceToMail");
      var editor = GetCurrentEditor();
      if (gMsgCompAttachSourceElement && editor &&
          (editor.flags & Components.interfaces.nsIPlaintextEditor.eEditorMailMask))
      {
        SetRelativeCheckbox = function() { SetAttachCheckbox();};
        //initialize the AttachSourceToMail checkbox
        gMsgCompAttachSourceElement.hidden = false;

        switch (document.documentElement.id)
        {
          case "imageDlg":
            gMsgCompInputElement = gDialog.srcInput;
            gMsgCompProcessLink = false;
            break;
          case "linkDlg" :
            gMsgCompInputElement =  gDialog.hrefInput;
            gMsgCompProcessLink = true;
            break;
        }
        if (gMsgCompInputElement)
        {
          SetAttachCheckbox();
          gMsgCompPrevMozDoNotSendAttribute = globalElement.getAttribute("moz-do-not-send")
        }
      }
    }
    addEventListener("load", OnLoadOverlay, false);

    function OnAcceptOverlay()
    {
      // Auto-convert file URLs to data URLs. If we're in the link properties
      // dialog convert only when requested - for the image dialog do it always.
      if (/^file:/i.test(gMsgCompInputElement.value.trim()) &&
          (gMsgCompAttachSourceElement.checked || !gMsgCompProcessLink)) {
        var dataURI = GenerateDataURL(gMsgCompInputElement.value.trim());
        gMsgCompInputElement.value = dataURI;
        gMsgCompAttachSourceElement.checked = true;
      }
      DoAttachSourceCheckbox();
    }
    addEventListener("dialogaccept", OnAcceptOverlay, false);

    function SetAttachCheckbox()
    {
      var resetCheckbox = false;
      var mozDoNotSend = globalElement.getAttribute("moz-do-not-send");

      //In case somebody played with the advanced property and changed the moz-do-not-send attribute
      if (mozDoNotSend != gMsgCompPrevMozDoNotSendAttribute)
      {
        gMsgCompPrevMozDoNotSendAttribute = mozDoNotSend;
        resetCheckbox = true;
      }

      // Has the URL changed
      if (gMsgCompInputElement && gMsgCompInputElement.value != gMsgCompPrevInputValue)
      {
        gMsgCompPrevInputValue = gMsgCompInputElement.value;
        resetCheckbox = true;
      }

      if (gMsgCompInputElement && resetCheckbox)
      {
        // Here is the rule about how to set the checkbox Attach Source To Message:
        // If the attribute "moz-do-not-send" has not been set, we look at the scheme of the URL
        // and at some preference to decide what is the best for the user.
        // If it is set to "false", the checkbox is checked, otherwise unchecked.
        var attach = false;
        if (mozDoNotSend == null)
        {
          // We haven't yet set the "moz-do-not-send" attribute.
          var inputValue = gMsgCompInputElement.value.trim();
          if (/^(file|data):/i.test(inputValue)) {
            // For files or data URLs, default to attach them.
            attach = true;
          } else if (!gMsgCompProcessLink && // Implies image dialogue.
                     /^https?:/i.test(inputValue)) {
            // For images loaded via http(s) we default to the preference value.
            attach = Services.prefs.getBoolPref("mail.compose.attach_http_images");
          }
        }
        else
        {
          attach = (mozDoNotSend == "false");
        }

        gMsgCompAttachSourceElement.checked = attach;
      }
    }

    function DoAttachSourceCheckbox()
    {
      gMsgCompPrevMozDoNotSendAttribute = (!gMsgCompAttachSourceElement.checked).toString();
      globalElement.setAttribute("moz-do-not-send", gMsgCompPrevMozDoNotSendAttribute);
    }

    function GenerateDataURL(url) {
      var file = Services.io.newURI(url, null, null)
        .QueryInterface(Components.interfaces.nsIFileURL).file;
      var contentType = Components.classes["@mozilla.org/mime;1"]
        .getService(Components.interfaces.nsIMIMEService)
        .getTypeFromFile(file);
      var inputStream = Components.classes["@mozilla.org/network/file-input-stream;1"]
        .createInstance(Components.interfaces.nsIFileInputStream);
      inputStream.init(file, 0x01, 0o600, 0);
      var stream = Components.classes["@mozilla.org/binaryinputstream;1"]
        .createInstance(Components.interfaces.nsIBinaryInputStream);
      stream.setInputStream(inputStream);
      let data = "";
      while (stream.available() > 0) {
        data += stream.readBytes(stream.available());
      }
      let encoded = btoa(data);
      stream.close();
      return "data:" + contentType +
        ";filename=" + encodeURIComponent(file.leafName) +
        ";base64," + encoded;
    }
  ]]>
  </script>

  <hbox id="MakeRelativeHbox">
    <checkbox id="AttachSourceToMail" hidden="true"
              label="&attachImageSource.label;" accesskey="&attachImageSource.accesskey;"
              insertafter="MakeRelativeCheckbox" oncommand="DoAttachSourceCheckbox()"/>
  </hbox>

  <groupbox id="LinkURLBox">
    <checkbox id="AttachSourceToMail" hidden="true"
              label="&attachLinkSource.label;" accesskey="&attachLinkSource.accesskey;"
              insertafter="LinkLocationBox" oncommand="DoAttachSourceCheckbox()"/>
  </groupbox>

</overlay>