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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* Fonts.java
* ---------------
*/
package org.jpedal.utils;
import java.util.StringTokenizer;
/**
* general font routines to create XML font token or extract information
* from the token or create a font object
*/
public class Fonts {
public static final String fe="";
public static final String fb=" Removes
* duplicate font commands where a font is turned off with /FONT tag and
* then turned back on again
* This arises because we put font tokens into the data and then may merge
* it together.
*/
public static final String cleanupTokens(final String input) {
final StringBuilder output_data = new StringBuilder();
String current_token, current_font = "";
int pointer = 0;
boolean next_font_is_identical = false;
final StringTokenizer data_As_tokens = new StringTokenizer(input, "<>", true);
String next_item = data_As_tokens.nextToken();
//work through all tokens in the data
while (data_As_tokens.hasMoreTokens()) {
if (next_item.equals("<") && data_As_tokens.hasMoreTokens()) {
//get token
current_token =
next_item
+ data_As_tokens.nextToken()
+ data_As_tokens.nextToken();
pointer += current_token.length();
//where we are in original data
next_item = ""; //set to no value
//track font in use so we can eliminate font off/same font on in data
if ((current_token.startsWith(fb))) {
current_font = current_token;
}
//ignore if next font the same - otherewise keep
if ((current_token.equals(fe))) {
//don't lose if if we are about to end a token pair
final int nextToken=input.indexOf('<', pointer - 1);
final int nextEndToken=input.indexOf("', next_font_pointer_s);
next_font_is_identical = false;
if ((next_font_pointer_s != -1)
&& (next_font_pointer_e != -1)) {
final String next_font =input.substring(next_font_pointer_s,next_font_pointer_e + 1);
if (next_font.equals(current_font)) {
next_font_is_identical = true;
}
}
//add if no matches
if (!next_font_is_identical) {
output_data.append(current_token);
}
}
} else if ((current_token.startsWith(fb))& next_font_is_identical) {
next_font_is_identical = false; //ignore next font command
} else {
output_data.append(current_token);
}
} else {
//not token so put in data
output_data.append(next_item);
pointer += next_item.length();
//where we are in original data
next_item = "";
}
//read next item if not read already
if ((data_As_tokens.hasMoreTokens())){
next_item = data_As_tokens.nextToken();
/*allow for it being the last item*/
if (!data_As_tokens.hasMoreTokens()){
//not token so put in data
output_data.append(next_item);
pointer += next_item.length();
}
}
}
return output_data.toString();
}
/**
* extract font size from font string. If a value is not found
* in the first value, the second will be used.
*/
public static final String getActiveFontTag(
final String raw_string,
final String full_value) {
int start;
final int end;
String return_value = "";
start = raw_string.lastIndexOf(fb);
if (start > -1) {
end = raw_string.indexOf("\">", start);
if (end > 0) {
return_value = raw_string.substring(start, end + 2);
}
} else {
start = full_value.lastIndexOf(fb);
if (start > -1) {
end = full_value.indexOf("\">", start);
if (end > 0) {
return_value = full_value.substring(start, end + 2);
}
}
}
return return_value;
}
/**
* create XML font token for putting into stream
*/
public static final String createFontToken(String font_name, final int font_size) {
final String font_token;
//set font used and include styles for truetype (ie Arial,Bold)
final int pointer = font_name.indexOf(',');
if (pointer != -1) {
final String weight = font_name.substring(pointer + 1);
font_name = font_name.substring(0, pointer);
font_token =fb+
"face=\""
+ font_name
+ "\" style=\"font-size:"
+ font_size
+ "pt;font-style:"
+ weight
+ "\">";
} else {
font_token =fb+
"face=\""
+ font_name
+ "\" style=\"font-size:"
+ font_size
+ "pt\">";
}
return font_token;
}
}