1 files changed, 76 insertions, 0 deletions

diff --git a/imports/codemirror/keymap/vim.js b/imports/codemirror/keymap/vim.js
new file mode 100755
index 00000000..e03e0128
--- /dev/null
+++ b/imports/codemirror/keymap/vim.js
@@ -0,0 +1,76 @@
+(function() {
+  var count = "";
+  function pushCountDigit(digit) { return function(cm) {count += digit;} }
+  function popCount() { var i = parseInt(count); count = ""; return i || 1; }
+  function countTimes(func) {
+    if (typeof func == "string") func = CodeMirror.commands[func];
+    return function(cm) { for (var i = 0, c = popCount(); i < c; ++i) func(cm); }
+  }
+
+  function iterObj(o, f) {
+    for (var prop in o) if (o.hasOwnProperty(prop)) f(prop, o[prop]);
+  }
+
+  var word = [/\w/, /[^\w\s]/], bigWord = [/\S/];
+  function findWord(line, pos, dir, regexps) {
+    var stop = 0, next = -1;
+    if (dir > 0) { stop = line.length; next = 0; }
+    var start = stop, end = stop;
+    // Find bounds of next one.
+    outer: for (; pos != stop; pos += dir) {
+      for (var i = 0; i < regexps.length; ++i) {
+        if (regexps[i].test(line.charAt(pos + next))) {
+          start = pos;
+          for (; pos != stop; pos += dir) {
+            if (!regexps[i].test(line.charAt(pos + next))) break;
+          }
+          end = pos;
+          break outer;
+        }
+      }
+    }
+    return {from: Math.min(start, end), to: Math.max(start, end)};
+  }
+  function moveToWord(cm, regexps, dir, where) {
+    var cur = cm.getCursor(), ch = cur.ch, line = cm.getLine(cur.line), word;
+    while (true) {
+      word = findWord(line, ch, dir, regexps);
+      ch = word[where == "end" ? "to" : "from"];
+      if (ch == cur.ch && word.from != word.to) ch = word[dir < 0 ? "from" : "to"];
+      else break;
+    }
+    cm.setCursor(cur.line, word[where == "end" ? "to" : "from"], true);
+  }
+
+  var map = CodeMirror.keyMap.vim = {
+    "0": function(cm) {count.length > 0 ? pushCountDigit("0")(cm) : CodeMirror.commands.goLineStart(cm);},
+    "I": function(cm) {popCount(); cm.setOption("keyMap", "vim-insert");},
+    "G": function(cm) {cm.setOption("keyMap", "vim-prefix-g");},
+    catchall: function(cm) {/*ignore*/}
+  };
+  // Add bindings for number keys
+  for (var i = 1; i < 10; ++i) map[i] = pushCountDigit(i);
+  // Add bindings that are influenced by number keys
+  iterObj({"H": "goColumnLeft", "L": "goColumnRight", "J": "goLineDown", "K": "goLineUp",
+                       "Left": "goColumnLeft", "Right": "goColumnRight", "Down": "goLineDown", "Up": "goLineUp",
+           "Backspace": "goCharLeft", "Space": "goCharRight",
+           "B": function(cm) {moveToWord(cm, word, -1, "end");},
+           "E": function(cm) {moveToWord(cm, word, 1, "end");},
+           "W": function(cm) {moveToWord(cm, word, 1, "start");},
+           "Shift-B": function(cm) {moveToWord(cm, bigWord, -1, "end");},
+           "Shift-E": function(cm) {moveToWord(cm, bigWord, 1, "end");},
+           "Shift-W": function(cm) {moveToWord(cm, bigWord, 1, "start");},
+           "U": "undo", "Ctrl-R": "redo", "Shift-4": "goLineEnd"},
+          function(key, cmd) { map[key] = countTimes(cmd); });
+
+  CodeMirror.keyMap["vim-prefix-g"] = {
+    "E": countTimes(function(cm) { moveToWord(cm, word, -1, "start");}),
+    "Shift-E": countTimes(function(cm) { moveToWord(cm, bigWord, -1, "start");}),
+    auto: "vim", catchall: function(cm) {/*ignore*/}
+  };
+
+  CodeMirror.keyMap["vim-insert"] = {
+    "Esc": function(cm) {cm.setOption("keyMap", "vim");},
+    fallthrough: ["default"]
+  };
+})();