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/* -*- Mode: java; tab-width: 4; indent-tabs-mode: 1; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1997-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Igor Bukanov
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License Version 2 or later (the "GPL"), in which
* case the provisions of the GPL are applicable instead of those above. If
* you wish to allow use of your version of this file only under the terms of
* the GPL and not to allow others to use your version of this file under the
* MPL, indicate your decision by deleting the provisions above and replacing
* them with the notice and other provisions required by the GPL. If you do
* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the GPL.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.javascript.tools.idswitch;
class CodePrinter {
// length of u-type escape like \u12AB
private static final int LITERAL_CHAR_MAX_SIZE = 6;
private String lineTerminator = "\n";
private int indentStep = 4;
private int indentTabSize = 8;
private char[] buffer = new char[1 << 12]; // 4K
private int offset;
public String getLineTerminator() { return lineTerminator; }
public void setLineTerminator(String value) { lineTerminator = value; }
public int getIndentStep() { return indentStep; }
public void setIndentStep(int char_count) { indentStep = char_count; }
public int getIndentTabSize() { return indentTabSize; }
public void setIndentTabSize(int tab_size) { indentTabSize = tab_size; }
public void clear() {
offset = 0;
}
private int ensure_area(int area_size) {
int begin = offset;
int end = begin + area_size;
if (end > buffer.length) {
int new_capacity = buffer.length * 2;
if (end > new_capacity) { new_capacity = end; }
char[] tmp = new char[new_capacity];
System.arraycopy(buffer, 0, tmp, 0, begin);
buffer = tmp;
}
return begin;
}
private int add_area(int area_size) {
int pos = ensure_area(area_size);
offset = pos + area_size;
return pos;
}
public int getOffset() {
return offset;
}
public int getLastChar() {
return offset == 0 ? -1 : buffer[offset - 1];
}
public void p(char c) {
int pos = add_area(1);
buffer[pos] = c;
}
public void p(String s) {
int l = s.length();
int pos = add_area(l);
s.getChars(0, l, buffer, pos);
}
public final void p(char[] array) {
p(array, 0, array.length);
}
public void p(char[] array, int begin, int end) {
int l = end - begin;
int pos = add_area(l);
System.arraycopy(array, begin, buffer, pos, l);
}
public void p(int i) {
p(Integer.toString(i));
}
public void qchar(int c) {
int pos = ensure_area(2 + LITERAL_CHAR_MAX_SIZE);
buffer[pos] = '\'';
pos = put_string_literal_char(pos + 1, c, false);
buffer[pos] = '\'';
offset = pos + 1;
}
public void qstring(String s) {
int l = s.length();
int pos = ensure_area(2 + LITERAL_CHAR_MAX_SIZE * l);
buffer[pos] = '"';
++pos;
for (int i = 0; i != l; ++i) {
pos = put_string_literal_char(pos, s.charAt(i), true);
}
buffer[pos] = '"';
offset = pos + 1;
}
private int put_string_literal_char(int pos, int c, boolean in_string) {
boolean backslash_symbol = true;
switch (c) {
case '\b': c = 'b'; break;
case '\t': c = 't'; break;
case '\n': c = 'n'; break;
case '\f': c = 'f'; break;
case '\r': c = 'r'; break;
case '\'': backslash_symbol = !in_string; break;
case '"': backslash_symbol = in_string; break;
default: backslash_symbol = false;
}
if (backslash_symbol) {
buffer[pos] = '\\';
buffer[pos + 1] = (char)c;
pos += 2;
}
else if (' ' <= c && c <= 126) {
buffer[pos] = (char)c;
++pos;
}
else {
buffer[pos] = '\\';
buffer[pos + 1] = 'u';
buffer[pos + 2] = digit_to_hex_letter(0xF & (c >> 12));
buffer[pos + 3] = digit_to_hex_letter(0xF & (c >> 8));
buffer[pos + 4] = digit_to_hex_letter(0xF & (c >> 4));
buffer[pos + 5] = digit_to_hex_letter(0xF & c);
pos += 6;
}
return pos;
}
private static char digit_to_hex_letter(int d) {
return (char)((d < 10) ? '0' + d : 'A' - 10 + d);
}
public void indent(int level) {
int visible_size = indentStep * level;
int indent_size, tab_count;
if (indentTabSize <= 0) {
tab_count = 0; indent_size = visible_size;
}
else {
tab_count = visible_size / indentTabSize;
indent_size = tab_count + visible_size % indentTabSize;
}
int pos = add_area(indent_size);
int tab_end = pos + tab_count;
int indent_end = pos + indent_size;
for (; pos != tab_end; ++pos) { buffer[pos] = '\t'; }
for (; pos != indent_end; ++pos) { buffer[pos] = ' '; }
}
public void nl() {
p('\n');
}
public void line(int indent_level, String s) {
indent(indent_level); p(s); nl();
}
public void erase(int begin, int end) {
System.arraycopy(buffer, end, buffer, begin, offset - end);
offset -= end - begin;
}
public String toString() {
return new String(buffer, 0, offset);
}
}
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