org.jpedal.utils.Fonts Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of OpenViewerFX Show documentation
Show all versions of OpenViewerFX Show documentation
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 1997-2016 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;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy