Initial commit

src/js/operations/Tidy.js

@@ -0,0 +1,238 @@
+/**
+ * Tidy operations.
+ *
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ *
+ * @namespace
+ */
+var Tidy = {
+
+    /**
+     * @constant
+     * @default
+     */
+    REMOVE_SPACES : true,
+    /**
+     * @constant
+     * @default
+     */
+    REMOVE_CARIAGE_RETURNS : true,
+    /**
+     * @constant
+     * @default
+     */
+    REMOVE_LINE_FEEDS : true,
+    /**
+     * @constant
+     * @default
+     */
+    REMOVE_TABS : true,
+    /**
+     * @constant
+     * @default
+     */
+    REMOVE_FORM_FEEDS : true,
+    /**
+     * @constant
+     * @default
+     */
+    REMOVE_FULL_STOPS : false,
+    
+    /**
+     * Remove whitespace operation.
+     *
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run_remove_whitespace: function (input, args) {
+        var remove_spaces = args[0],
+            remove_cariage_returns = args[1],
+            remove_line_feeds = args[2],
+            remove_tabs = args[3],
+            remove_form_feeds = args[4],
+            remove_full_stops = args[5],
+            data = input;
+            
+        if (remove_spaces) data = data.replace(/ /g, "");
+        if (remove_cariage_returns) data = data.replace(/\r/g, "");
+        if (remove_line_feeds) data = data.replace(/\n/g, "");
+        if (remove_tabs) data = data.replace(/\t/g, "");
+        if (remove_form_feeds) data = data.replace(/\f/g, "");
+        if (remove_full_stops) data = data.replace(/\./g, "");
+        return data;
+    },
+    
+    
+    /**
+     * Remove null bytes operation.
+     *
+     * @param {byte_array} input
+     * @param {Object[]} args
+     * @returns {byte_array}
+     */
+    run_remove_nulls: function (input, args) {
+        var output = [];
+        for (var i = 0; i < input.length; i++) {
+            if (input[i] !== 0) output.push(input[i]);
+        }
+        return output;
+    },
+    
+    
+    /**
+     * @constant
+     * @default
+     */
+    APPLY_TO_EACH_LINE : false,
+    /**
+     * @constant
+     * @default
+     */
+    DROP_START : 0,
+    /**
+     * @constant
+     * @default
+     */
+    DROP_LENGTH : 5,
+    
+    /**
+     * Drop bytes operation.
+     *
+     * @param {byte_array} input
+     * @param {Object[]} args
+     * @returns {byte_array}
+     */
+    run_drop_bytes: function(input, args) {
+        var start = args[0],
+            length = args[1],
+            apply_to_each_line = args[2];
+            
+        if (start < 0 || length < 0)
+            throw "Error: Invalid value";
+            
+        if (!apply_to_each_line)
+            return input.slice(0, start).concat(input.slice(start+length, input.length));
+            
+        // Split input into lines
+        var lines = [],
+            line = [];
+            
+        for (var i = 0; i < input.length; i++) {
+            if (input[i] == 0x0a) {
+                lines.push(line);
+                line = [];
+            } else {
+                line.push(input[i]);
+            }
+        }
+        lines.push(line);
+        
+        var output = [];
+        for (i = 0; i < lines.length; i++) {
+            output = output.concat(lines[i].slice(0, start).concat(lines[i].slice(start+length, lines[i].length)));
+            output.push(0x0a);
+        }
+        return output.slice(0, output.length-1);
+    },
+    
+    
+    /**
+     * @constant
+     * @default
+     */
+    TAKE_START: 0,
+    /**
+     * @constant
+     * @default
+     */
+    TAKE_LENGTH: 5,
+    
+    /**
+     * Take bytes operation.
+     *
+     * @param {byte_array} input
+     * @param {Object[]} args
+     * @returns {byte_array}
+     */
+    run_take_bytes: function(input, args) {
+        var start = args[0],
+            length = args[1],
+            apply_to_each_line = args[2];
+            
+        if (start < 0 || length < 0)
+            throw "Error: Invalid value";
+            
+        if (!apply_to_each_line)
+            return input.slice(start, start+length);
+            
+        // Split input into lines
+        var lines = [],
+            line = [];
+            
+        for (var i = 0; i < input.length; i++) {
+            if (input[i] == 0x0a) {
+                lines.push(line);
+                line = [];
+            } else {
+                line.push(input[i]);
+            }
+        }
+        lines.push(line);
+        
+        var output = [];
+        for (i = 0; i < lines.length; i++) {
+            output = output.concat(lines[i].slice(start, start+length));
+            output.push(0x0a);
+        }
+        return output.slice(0, output.length-1);
+    },
+    
+    
+    /**
+     * @constant
+     * @default
+     */
+    PAD_POSITION : ["Start", "End"],
+    /**
+     * @constant
+     * @default
+     */
+    PAD_LENGTH : 5,
+    /**
+     * @constant
+     * @default
+     */
+    PAD_CHAR : " ",
+    
+    /**
+     * Pad lines operation.
+     *
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run_pad: function(input, args) {
+        var position = args[0],
+            len = args[1],
+            chr = args[2],
+            lines = input.split("\n"),
+            output = "",
+            i = 0;
+            
+        if (position == "Start") {
+            for (i = 0; i < lines.length; i++) {
+                output += Utils.pad_left(lines[i], lines[i].length+len, chr) + "\n";
+            }
+        } else if (position == "End") {
+            for (i = 0; i < lines.length; i++) {
+                output += Utils.pad_right(lines[i], lines[i].length+len, chr) + "\n";
+            }
+        }
+        
+        return output.slice(0, output.length-1);
+    },
+    
+};