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//zmg, 03.01.01
//this file needs a better description!
//
//
// ***** history_setHistory() *****
//IN: rptr.INPUT = the input from the command line
//DO: store the current input from the command line in the history buffer,
// if the history buffer becomes full, the oldest command in the buffer is
// tossed, and all of the other commands are "slid back" to make room
// for the new one.
//OUT: updated history buffer
function history_setHistory() {
var r = eval("_root.r" + _root.active_router); //'r' is a "pointer" to the active router object
var vr = eval("_root.r" + _root.VISIBLE_ROUTER); //'r' is a "pointer" to the visible router object
var history; // a pointer to the history object
//this if-statement points the 'history' ptr to the correct
//history buffer to store the command history into
if ((r.MODE == "user") || (r.MODE == "enable")) {
//we are in either "user" or "enable" mode, so the 'history'
//ptr should point to the user mode's history buffer.
//C history = r.userHistory;
history = _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].userHistory;
} else {
//we're in "config" mode, so the 'history' ptr should
//point to the config mode's history buffer.
//C history = r.configHistory;
history = _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].configHistory;
}
//if the last entry in the history buffer is different than what
//was just entered on the command line, this if-statement will
//execute to save this command in the history buffer
if (history[history.length-1] != vr.INPUT) {
//store this most recent command from the command line in
//the last position of the history buffer (array)
history[history.length] = vr.INPUT;
//if the buffer is over the declared length, remove the
//oldest command in the buffer and "shift" every command
//up one slot in the history buffer.
if (history.length > _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].historyBufferLength) {
history.shift();
}
}
//update the current length counter of the history buffer
//in the router object
if ((r.MODE == "user") || (r.MODE == "enable"))
{
//r.userHistIndex = history.length;
_root.devCmdHist[routerUsedForThisStep[_root.stepnum]].userHistIndex = history.length;
}
else
{
//r.configHistIndex = history.length;
_root.devCmdHist[routerUsedForThisStep[_root.stepnum]].configHistIndex = history.length;
}
}
// ***** history_historyBackward() *****
//IN: <none>
//DO: print the previous input command from the history buffer to the
// current command line--called when the user is scrolling "backward"
// through the history of commands.
//OUT: console is updated to show the previous command in the history
function history_historyBackward() {
// pointer to the active router object
var r = eval("_root.r" + _root.active_router);
// pointer to the visible router object
var vr = eval("_root.r" + _root.VISIBLE_ROUTER);
var history; //"pointer" to the history object
var histIndex; //tmp.var, index into the history object
//this if-statement points the 'history' ptr to the correct
//history buffer to read the command history from
if ((r.MODE == "user") || (r.MODE == "enable")) {
//we are in either "user" or "enable" mode, so the 'history'
//ptr should point to the user mode's history buffer.
history = _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].userHistory;
//point 'histIndex' to the current element
//in the history buffer
histIndex = _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].userHistIndex;
} else {
//we're in "config" mode, so the 'history' ptr should
//point to the config mode's history buffer.
history = _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].configHistory;
//point 'histIndex' to the current element
//in the history buffer
histIndex = _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].configHistIndex;
}
//this if-statement executes if there are commands left
//in the history buffer (before the current one) to display.
//if not, then this function simply returns.
if (histIndex > 0) {
//"back up" the current history buffer ptr to the previous command
histIndex--;
//"back up" the current history buffer index to the previous
//command in the appropriate router area as well.
if ((r.MODE == "user") || (r.MODE == "enable")) {
_root.devCmdHist[routerUsedForThisStep[_root.stepnum]].userHistIndex--;
} else {
_root.devCmdHist[routerUsedForThisStep[_root.stepnum]].configHistIndex--;
}
//replace the last line w/a prompt: remove all characters
//displayed on the last line, except for the prompt, and leave
//the cursor right after the prompt
r.line[r.lastLine] = r.line[r.lastLine].substring(0,r.PROMPT.length);
//fill the current router's input buffer (rptr.INPUT) with
//the previous command from the history buffer...
vr.INPUT = history[histIndex];
//...and print it to the Hyperterminal console.
r.lineIndexCounter = r.INPUT.length;
output_write(vr.INPUT);
}
}
// ***** history_historyForward() *****
//IN: <none>
//DO: print the next input command from the history buffer to the
// current command line--called when the user is scrolling "forward"
// through the history of commands.
//OUT: console is updated to show the next command in the history
function history_historyForward() {
var r = eval("_root.r" + _root.active_router); //'rptr' is a "pointer" to the active router object
var vr = eval("_root.r" + _root.VISIBLE_ROUTER); //'rptr' is a "pointer" to the visible router object
var history; //"pointer" to the history object
var histIndex; //tmp.var, index into the history object
//this if-statement points the 'history' ptr to the correct
//history buffer to read the command history from
if ((r.MODE == "user") || (r.MODE == "enable")) {
//we are in either "user" or "enable" mode, so the 'history'
//ptr should point to the user mode's history buffer.
history = _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].userHistory;
//point 'histIndex' to the current element
//in the history buffer
histIndex = _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].userHistIndex;
} else {
//we're in "config" mode, so the 'history' ptr should
//point to the config mode's history buffer.
history = _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].configHistory;
//point 'histIndex' to the current element
//in the history buffer
histIndex = _root.devCmdHist[routerUsedForThisStep[_root.stepnum]].configHistIndex;
}
//this if-statement executes if there are commands left
//in the history buffer (after the current one) to display.
//if not, then this function simply returns.
if (histIndex < history.length) {
//"advance" the current history buffer ptr to the previous command
histIndex++;
//"back up" the current history buffer index to the previous
//command in the appropriate router area as well.
if ((r.MODE == "user") || (r.MODE == "enable")) {
_root.devCmdHist[routerUsedForThisStep[_root.stepnum]].userHistIndex++;
} else {
_root.devCmdHist[routerUsedForThisStep[_root.stepnum]].configHistIndex++;
}
//replace the last line w/a prompt: remove all characters
//displayed on the last line, except for the prompt, and leave
//the cursor right after the prompt
r.line[r.lastLine] = r.line[r.lastLine].substring(0,r.PROMPT.length);
if (histIndex != history.length) {
//there are more commands following this one in the
//history buffer, so fill the current router's input
//buffer (rptr.INPUT) with the next command from the
//history buffer...
vr.INPUT = history[histIndex];
} else {
//there are no more commands, print nothing to
//the command line
vr.INPUT = "";
}
//...print the router object command line input buffer
//(set by the if-statement above) to the Hyperterminal
//console...
r.lineIndexCounter = vr.INPUT.length;
output_write(vr.INPUT);
}
}
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