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ANTLR Tool Source Code
ANTLR is a powerful parser generator for multiple programming languages including Java.
ANTLR contains 2 major modules:
ANTLR Tool Source Code files are provided in the distribution packge (antlr4-4.10.1.zip). You can download them at ANTLR Website.
You can also browse the source code below:
✍: FYIcenter
⏎ org/antlr/v4/gui/BasicFontMetrics.java
/* * Copyright (c) 2012-2017 The ANTLR Project. All rights reserved. * Use of this file is governed by the BSD 3-clause license that * can be found in the LICENSE.txt file in the project root. */ package org.antlr.v4.gui; /** Font metrics. The only way to generate accurate images * in any format that contain text is to know the font metrics. * Specifically, we need to know the width of every character and the * maximum height (since we want all characters to fit within same line height). * I used ttf2tfm to dump the font metrics from Mac TrueType fonts and * then converted that to a Java class for use in a PostScript generator * for trees. Commands: * * <pre> * $ ttf2tfm /Library/Fonts/Arial\ Black.ttf > metrics * </pre> * * Then run metrics into python code after stripping header/footer: * * <pre> * # * # Process lines from ttf2tfm that look like this: * # Glyph Code Glyph Name Width llx lly urx ury * # ------------------------------------------------------------------------ * # 3 00020 space 333 0, 0 -- 0, 0 * # * lines = open("metrics").read().split('\n') * print "public class FontName {" * print " {" * maxh = 0; * for line in lines[4:]: # skip header 0..3 * all = line.split(' ') * words = [x for x in all if len(x)>0] * ascii = int(words[1], 16) * height = int(words[8]) * if height>maxh: maxh = height * if ascii>=128: break * print " widths[%d] = %s; // %s" % (ascii, words[3], words[2]) * * print " maxCharHeight = "+str(maxh)+";" * print " }" * print "}" * </pre> * * Units are 1000th of an 'em'. */ public abstract class BasicFontMetrics { public static final int MAX_CHAR = '\u00FF'; protected int maxCharHeight; protected int[] widths = new int[MAX_CHAR+1]; public double getWidth(String s, int fontSize) { double w = 0; for (char c : s.toCharArray()) { w += getWidth(c, fontSize); } return w; } public double getWidth(char c, int fontSize) { if ( c > MAX_CHAR || widths[c]==0 ) return widths['m']/1000.0; // return width('m') return widths[c]/1000.0 * fontSize; } public double getLineHeight(int fontSize) { return maxCharHeight / 1000.0 * fontSize; } }
⏎ org/antlr/v4/gui/BasicFontMetrics.java
Or download all of them as a single archive file:
File name: antlr-tool-4.10.1-sources.jar File size: 347718 bytes Release date: 2022-04-15 Download
2022-04-24, 27708👍, 0💬
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