[evolution/wip/mcrha/webkit-jsc-api: 243/292] e-undo-redo.js: Handle drag&drop inside of the WebView

[Milan Crha <mcrha src gnome org>]

commit 4c3fc8b42a61143de6f406a6d5c8117500cc6880
Author: Milan Crha <mcrha redhat com>
Date:   Tue Nov 26 10:58:19 2019 +0100

    e-undo-redo.js: Handle drag&drop inside of the WebView

 data/webkit/e-undo-redo.js | 35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)
---
diff --git a/data/webkit/e-undo-redo.js b/data/webkit/e-undo-redo.js
index bad85b764b..8d907644e4 100644
--- a/data/webkit/e-undo-redo.js
+++ b/data/webkit/e-undo-redo.js
@@ -327,6 +327,7 @@ var EvoUndoRedo = {
        delete all nodes between index >= firstChildIndex && index < children.length - restChildrenCount.
        */
 
+       dropTarget : null, // passed from drop_cb() into before_input_cb()/input_cb() for "insertFromDrop" 
event
        disabled : 0,
        ongoingRecordings : [] // the recordings can be nested
 };
@@ -336,6 +337,7 @@ EvoUndoRedo.Attach = function()
        if (document.documentElement) {
                document.documentElement.onbeforeinput = EvoUndoRedo.before_input_cb;
                document.documentElement.oninput = EvoUndoRedo.input_cb;
+               document.documentElement.ondrop = EvoUndoRedo.drop_cb;
        }
 }
 
@@ -344,6 +346,7 @@ EvoUndoRedo.Detach = function()
        if (document.documentElement) {
                document.documentElement.onbeforeinput = null;
                document.documentElement.oninput = null;
+               document.documentElement.ondrop = null;
        }
 }
 
@@ -384,6 +387,9 @@ EvoUndoRedo.before_input_cb = function(inputEvent)
        if (EvoUndoRedo.isWordDelimEvent(inputEvent))
                opType += "::WordDelim";
 
+       if (opType == "insertFromDrop")
+               startNode = EvoUndoRedo.dropTarget;
+
        if (document.getSelection().isCollapsed) {
                if (opType == "deleteWordBackward") {
                        var sel = EvoSelection.Store(document);
@@ -468,6 +474,14 @@ EvoUndoRedo.input_cb = function(inputEvent)
        }
 
        EvoEditor.forceFormatStateUpdate = EvoEditor.forceFormatStateUpdate || opType == "" || 
opType.startsWith("format");
+
+       if (opType == "insertFromDrop")
+               EvoUndoRedo.dropTarget = null;
+}
+
+EvoUndoRedo.drop_cb = function(event)
+{
+       EvoUndoRedo.dropTarget = event.toElement;
 }
 
 EvoUndoRedo.applyRecord = function(record, isUndo, withSelection)
@@ -633,6 +647,25 @@ EvoUndoRedo.StopRecord = function(kind, opType)
 
        var record = EvoUndoRedo.ongoingRecordings[EvoUndoRedo.ongoingRecordings.length - 1];
 
+       if (record.kind != kind || record.opType != opType) {
+               var ii;
+
+               for (ii = EvoUndoRedo.ongoingRecordings.length - 2; ii >= 0; ii--) {
+                       record = EvoUndoRedo.ongoingRecordings[ii];
+
+                       if (record.kind == kind && record.opType == opType) {
+                               var jj;
+
+                               for (jj = ii + 1; jj < EvoUndoRedo.ongoingRecordings.length; jj++) {
+                                       EvoUndoRedo.ongoingRecordings[jj - 1] = 
EvoUndoRedo.ongoingRecordings[jj];
+                               }
+
+                               EvoUndoRedo.ongoingRecordings[EvoUndoRedo.ongoingRecordings.length - 1] = 
record;
+                               break;
+                       }
+               }
+       }
+
        if (record.kind != kind) {
                throw "EvoUndoRedo:StopRecord: Mismatch in record kind, expected " + record.kind + ", but 
received " + kind;
        }
@@ -700,7 +733,7 @@ EvoUndoRedo.StopRecord = function(kind, opType)
 
        record.selectionAfter = EvoSelection.Store(document);
 
-       if (EvoUndoRedo.ongoingRecordings.length) {
+       if (EvoUndoRedo.ongoingRecordings.length && 
EvoUndoRedo.ongoingRecordings[EvoUndoRedo.ongoingRecordings.length - 1].kind == 
EvoUndoRedo.RECORD_KIND_GROUP) {
                var parentRecord = EvoUndoRedo.ongoingRecordings[EvoUndoRedo.ongoingRecordings.length - 1];
                var records = parentRecord.records;