FakeVim: Fix mappings in insert mode

Mapped user input shouldn't break edit block in insert mode.

Change-Id: I47ad449d9f0a2623cfcbdfa6c66626aa876ed76b
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/fakevim/fakevim_test.cpp

@@ -2603,6 +2603,7 @@ void FakeVimPlugin::test_map()
     data.setText("abc" N "def");
     data.doCommand(QString::fromUtf8("no \xc3\xb8 l|no l k|no k j|no j h"));
     KEYS(QString::fromUtf8("\xc3\xb8"), "a" X "bc" N "def");
+    data.doCommand(QString::fromUtf8("unmap \xc3\xb8|unmap l|unmap k|unmap j"));
 
     // Don't handle mapping in sub-modes that are not followed by movement command.
     data.setText("abc" N "def");
@@ -2627,6 +2628,16 @@ void FakeVimPlugin::test_map()
     data.doCommand("onoremap iwwX 3iwX Y");
     KEYS("ciwwX Z<esc>", "X Y " X "Z" N "ghi jkl");
     data.doCommand("unmap <SPACE>X");
+
+    // use mapping for <ESC> in insert
+    data.setText("ab" X "c def" N "ghi jkl");
+    data.doCommand("inoremap jk <ESC>");
+    KEYS("<C-V>jll" "I__jk", "ab" X "__c def" N "gh__i jkl");
+    INTEGRITY(false);
+    data.doCommand("unmap jk"); // shouldn't unmap for insert mode
+    KEYS("ijk", "a" X "b__c def" N "gh__i jkl");
+    data.doCommand("iunmap jk");
+    KEYS("ijk<ESC>", "aj" X "kb__c def" N "gh__i jkl");
 }
 
 void FakeVimPlugin::test_vim_command_cc()

src/plugins/fakevim/fakevimhandler.cpp

@@ -1495,11 +1495,12 @@ private:
 // state of current mapping
 struct MappingState {
     MappingState()
-        : noremap(false), silent(false) {}
-    MappingState(bool noremap, bool silent)
-        : noremap(noremap), silent(silent) {}
+        : noremap(false), silent(false), editBlock(false) {}
+    MappingState(bool noremap, bool silent, bool editBlock)
+        : noremap(noremap), silent(silent), editBlock(editBlock) {}
     bool noremap;
     bool silent;
+    bool editBlock;
 };
 
 class FakeVimHandler::Private : public QObject
@@ -2683,9 +2684,13 @@ void FakeVimHandler::Private::prependMapping(const Inputs &inputs)
     ++g.mapDepth;
     g.pendingInput.prepend(Input());
     prependInputs(inputs);
-    g.mapStates << MappingState(inputs.noremap(), inputs.silent());
     g.commandBuffer.setHistoryAutoSave(false);
-    beginLargeEditBlock();
+
+    // start new edit block (undo/redo) only if necessary
+    bool editBlock = m_editBlockLevel == 0 && !(isInsertMode() && isInsertStateValid());
+    if (editBlock)
+        beginLargeEditBlock();
+    g.mapStates << MappingState(inputs.noremap(), inputs.silent(), editBlock);
 }
 
 bool FakeVimHandler::Private::expandCompleteMapping()
@@ -2715,8 +2720,9 @@ void FakeVimHandler::Private::endMapping()
         --g.mapDepth;
     if (g.mapStates.isEmpty())
         return;
+    if (g.mapStates.last().editBlock)
+        endEditBlock();
     g.mapStates.pop_back();
-    endEditBlock();
     if (g.mapStates.isEmpty())
         g.commandBuffer.setHistoryAutoSave(true);
     updateMiniBuffer();