Bug 307774 - Capture drag-drop and pasting of text and switch to multiline input if appropriate.

ChatZilla only.
r=silver
p=rdmsoft@bugs.rdmsoft.com (Robert Marshall)

extensions/irc/xul/content/handlers.js

@@ -118,6 +118,10 @@ function initHandlers()
     window.addEventListener("blur", onWindowBlue, true);
 
     client.inputPopup = null;
+
+    // Should fail silently pre-moz1.4
+    doCommandWithParams("cmd_clipboardDragDropHook",
+                        {addhook: CopyPasteHandler});
 }
 
 function onClose()
@@ -2865,3 +2869,50 @@ function my_dccfiledisconnect(e)
     this.display(msg, "DCC-FILE");
 }
 
+var CopyPasteHandler = new Object();
+
+CopyPasteHandler.onPasteOrDrop =
+function phand_onpaste(e, data)
+{
+    // XXXbug 329487: The effect of onPasteOrDrop's return value is actually the
+    //                exact opposite of the definition in the IDL.
+
+    // Don't mess with the multiline box at all.
+    if (client.prefs["multiline"])
+        return true;
+
+    var str = new Object();
+    var strlen = new Object();
+    data.getTransferData("text/unicode", str, strlen);
+    str.value.QueryInterface(Components.interfaces.nsISupportsString);
+    str.value.data = str.value.data.replace(/(^\s*[\r\n]+|[\r\n]+\s*$)/g, "");
+
+    if (str.value.data.indexOf("\n") == -1)
+    {
+        // If, after stripping leading/trailing empty lines, the string is a
+        // single line, put it back in the transferable and return.
+        data.setTransferData("text/unicode", str.value,
+                             str.value.data.length * 2);
+        return true;
+    }
+
+    // If it's a drop, move the text cursor to the mouse position.
+    if (e && ("rangeOffset" in e))
+        client.input.setSelectionRange(e.rangeOffset, e.rangeOffset);
+
+    str = client.input.value.substr(0, client.input.selectionStart) +
+          str.value.data + client.input.value.substr(client.input.selectionEnd);
+    client.prefs["multiline"] = true;
+    client.input.value = str;
+    return false;
+}
+
+CopyPasteHandler.QueryInterface =
+function phand_qi(iid)
+{
+    if (iid.equals(Components.interfaces.nsISupports) ||
+        iid.equals(Components.interfaces.nsIClipboardDragDropHooks))
+        return this;
+
+    throw Components.results.NS_ERROR_NO_INTERFACE;
+}

extensions/irc/xul/content/static.js

@@ -2005,7 +2005,7 @@ function addDynamicRule (rule)
 function getCommandEnabled(command)
 {
     try {
-        var dispatcher = top.document.commandDispatcher;
+        var dispatcher = document.commandDispatcher;
         var controller = dispatcher.getControllerForCommand(command);
 
         return controller.isCommandEnabled(command);
@@ -2019,7 +2019,7 @@ function getCommandEnabled(command)
 function doCommand(command)
 {
     try {
-        var dispatcher = top.document.commandDispatcher;
+        var dispatcher = document.commandDispatcher;
         var controller = dispatcher.getControllerForCommand(command);
         if (controller && controller.isCommandEnabled(command))
             controller.doCommand(command);
@@ -2029,6 +2029,28 @@ function doCommand(command)
     }
 }
 
+function doCommandWithParams(command, params)
+{
+    try {
+        var dispatcher = document.commandDispatcher;
+        var controller = dispatcher.getControllerForCommand(command);
+        controller.QueryInterface(Components.interfaces.nsICommandController);
+
+        if (!controller || !controller.isCommandEnabled(command))
+            return;
+
+        var cmdparams = newObject("@mozilla.org/embedcomp/command-params;1",
+                                  "nsICommandParams");
+        for (var i in params)
+            cmdparams.setISupportsValue(i, params[i]);
+
+        controller.doCommandWithParams(command, cmdparams);
+    }
+    catch (e)
+    {
+    }
+}
+
 var testURLs =
     ["irc:", "irc://", "irc:///", "irc:///help", "irc:///help,needkey",
     "irc://irc.foo.org", "irc://foo:6666",