name = "up";

group = "stack";

shortDescription = "Select and print the stack frame above the current one";

longDescription = "";

seeAlso = [ "down", "frame" ];

function execute() {

    scheduleGetContextCount();

    state = 1;

}

function handleResponse(resp) {

    if (state == 1) {

        var count = resp.result;

        var idx = getCurrentFrameIndex() + 1;

        if (idx == count) {

            warning("Already at top (outermost) frame.");

            return;

        }

        setCurrentFrameIndex(idx);

        scheduleGetContextInfo(idx);

        state = 2;

    } else if (state == 2) {

        var info = resp.result;

        setCurrentScriptId(info.scriptId);

        setCurrentLineNumber(info.lineNumber);

        scheduleGetBacktrace();

        state = 3;

    } else if (state == 3) {

        var backtrace = resp.result;

        message("#" + getCurrentFrameIndex() + "  " + backtrace[getCurrentFrameIndex()]);

    }

}