/**
* Waiter to handle events related to the input.
*
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2016
* @license Apache-2.0
*
* @constructor
* @param {HTMLApp} app - The main view object for CyberChef.
* @param {Manager} manager - The CyberChef event manager.
*/
var InputWaiter = function(app, manager) {
this.app = app;
this.manager = manager;
// Define keys that don't change the input so we don't have to autobake when they are pressed
this.bad_keys = [
16, //Shift
17, //Ctrl
18, //Alt
19, //Pause
20, //Caps
27, //Esc
33,34,35,36, //PgUp, PgDn, End, Home
37,38,39,40, //Directional
44, //PrntScrn
91,92, //Win
93, //Context
112,113,114,115,116,117,118,119,120,121,122,123, //F1-12
144, //Num
145, //Scroll
];
};
/**
* Gets the user's input from the input textarea.
*
* @returns {string}
*/
InputWaiter.prototype.get = function() {
return document.getElementById("input-text").value;
};
/**
* Sets the input in the input textarea.
*
* @param {string} input
*
* @fires Manager#statechange
*/
InputWaiter.prototype.set = function(input) {
document.getElementById("input-text").value = input;
window.dispatchEvent(this.manager.statechange);
};
/**
* Displays information about the input.
*
* @param {number} length - The length of the current input string
* @param {number} lines - The number of the lines in the current input string
*/
InputWaiter.prototype.set_input_info = function(length, lines) {
var width = length.toString().length;
width = width < 2 ? 2 : width;
var length_str = Utils.pad(length.toString(), width, " ").replace(/ /g, " ");
var lines_str = Utils.pad(lines.toString(), width, " ").replace(/ /g, " ");
document.getElementById("input-info").innerHTML = "length: " + length_str + "<br>lines: " + lines_str;
};
/**
* Handler for input scroll events.
* Scrolls the highlighter pane to match the input textarea position and updates history state.
*
* @param {event} e
*
* @fires Manager#statechange
*/
InputWaiter.prototype.input_change = function(e) {
// Remove highlighting from input and output panes as the offsets might be different now
this.manager.highlighter.remove_highlights();
// Reset recipe progress as any previous processing will be redundant now
this.app.progress = 0;
// Update the input metadata info
var input_text = this.get(),
lines = input_text.count("\n") + 1;
this.set_input_info(input_text.length, lines);
if (this.bad_keys.indexOf(e.keyCode) < 0) {
// Fire the statechange event as the input has been modified
window.dispatchEvent(this.manager.statechange);
}
};
/**
* Handler for input dragover events.
* Gives the user a visual cue to show that items can be dropped here.
*
* @param {event} e
*/
InputWaiter.prototype.input_dragover = function(e) {
// This will be set if we're dragging an operation
if (e.dataTransfer.effectAllowed === "move")
return false;
e.stopPropagation();
e.preventDefault();
e.target.classList.add("dropping-file");
};
/**
* Handler for input dragleave events.
* Removes the visual cue.
*
* @param {event} e
*/
InputWaiter.prototype.input_dragleave = function(e) {
e.stopPropagation();
e.preventDefault();
e.target.classList.remove("dropping-file");
};
/**
* Handler for input drop events.
* Loads the dragged data into the input textarea.
*
* @param {event} e
*/
InputWaiter.prototype.input_drop = function(e) {
// This will be set if we're dragging an operation
if (e.dataTransfer.effectAllowed === "move")
return false;
e.stopPropagation();
e.preventDefault();
var el = e.target,
file = e.dataTransfer.files[0],
text = e.dataTransfer.getData("Text"),
reader = new FileReader(),
input_charcode = "",
offset = 0,
CHUNK_SIZE = 20480; // 20KB
var set_input = function() {
if (input_charcode.length > 100000 && this.app.auto_bake_) {
this.manager.controls.set_auto_bake(false);
this.app.alert("Turned off Auto Bake as the input is large", "warning", 5000);
}
this.set(input_charcode);
var recipe_config = this.app.get_recipe_config();
if (!recipe_config[0] || recipe_config[0].op != "From Hex") {
recipe_config.unshift({op:"From Hex",args:["Space"]});
this.app.set_recipe_config(recipe_config);
}
el.classList.remove("loading_file");
}.bind(this);
var seek = function() {
if (offset >= file.size) {
set_input();
return;
}
el.value = "Processing... " + Math.round(offset / file.size * 100) + "%";
var slice = file.slice(offset, offset + CHUNK_SIZE);
reader.readAsArrayBuffer(slice);
}.bind(this);
reader.onload = function(e) {
var data = new Uint8Array(reader.result);
input_charcode += Utils.to_hex_fast(data);
offset += CHUNK_SIZE;
seek();
}.bind(this);
el.classList.remove("dropping-file");
if (file) {
el.classList.add("loading_file");
seek();
} else if (text) {
this.set(text);
}
};
/**
* Handler for clear IO events.
* Resets the input, output and info areas.
*
* @fires Manager#statechange
*/
InputWaiter.prototype.clear_io_click = function() {
this.manager.highlighter.remove_highlights();
document.getElementById("input-text").value = "";
document.getElementById("output-text").value = "";
document.getElementById("input-info").innerHTML = "";
document.getElementById("output-info").innerHTML = "";
document.getElementById("input-selection-info").innerHTML = "";
document.getElementById("output-selection-info").innerHTML = "";
window.dispatchEvent(this.manager.statechange);
};
CyberChef