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Add :if/:elseif/:else/:endif contiditionals. Also add comment help tag.

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--HG--
extra : rebase_source : 6b6e15157d2fae436aa812df2db94a36a5e7ce79
This commit is contained in:
Kris Maglione
2010-10-16 22:09:56 -04:00
parent abf3b691d0
commit 11a98b31f7
6 changed files with 170 additions and 2 deletions
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62
common/content/commands.js
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@@ -145,8 +145,12 @@ const Command = Class("Command", {
if (args.bang && !this.bang)
throw FailedAssertion("E477: No ! allowed");
dactyl.trapErrors(function exec(command) {
this.action(args, modifiers);
if (this.always)
this.always(args, modifiers);
if (!io.sourcing || !io.sourcing.noExecute)
this.action(args, modifiers);
}, this);
},
@@ -1245,6 +1249,62 @@ const Commands = Module("commands", {
completer: function (context) completion.userCommand(context)
});
function checkStack(cmd) {
util.assert(io.sourcing && io.sourcing.stack &&
io.sourcing.stack[cmd] && io.sourcing.stack[cmd].length,
"Invalid use of conditional");
}
function pop(cmd) {
checkStack(cmd);
return io.sourcing.stack[cmd].pop();
}
function push(cmd, value) {
util.assert(io.sourcing, "Invalid use of conditional");
if (arguments.length < 2)
value = io.sourcing.noExecute;
io.sourcing.stack = io.sourcing.stack || {};
io.sourcing.stack[cmd] = (io.sourcing.stack[cmd] || []).concat([value])
}
commands.add(["if"],
"Execute commands until the next :elseif, :else, or :endif only if the argument returns true",
function (args) { io.sourcing.noExecute = !dactyl.userEval(args[0]); },
{
always: function (args) { push("if") },
argCount: "1",
literal: 0
});
commands.add(["elsei[f]", "elif"],
"Execute commands until the next :elseif, :else, or :endif only if the argument returns true",
function (args) {},
{
always: function (args) {
checkStack("if");
io.sourcing.noExecute = io.sourcing.stack.if.slice(-1)[0] ||
!io.sourcing.noExecute || !dactyl.userEval(args[0]);
},
argCount: "1",
literal: 0
});
commands.add(["el[se]"],
"Execute commands until the next :endif only if the previous conditionals were not executed",
function (args) {},
{
always: function (args) {
checkStack("if");
io.sourcing.noExecute = io.sourcing.stack.if.slice(-1)[0] ||
!io.sourcing.noExecute;
},
argCount: "0"
});
commands.add(["en[dif]", "fi"],
"Ends a string of :if/:elseif/:else conditionals",
function (args) {},
{
always: function (args) { io.sourcing.noExecute = pop("if") },
argCount: "0"
});
commands.add(["y[ank]"],
"Yanks the output of the given command to the clipboard",
function (args) {