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First step towards implementing #71. Size does not yet take into acco…
…unt the zoom level, but parsing ^ and _ commands is now active.
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src/net/sourceforge/fidocadj/graphic/DecoratedText.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| package net.sourceforge.fidocadj.graphic; | ||
|
|
||
| /** Decorated text is a class that provides advanced text functions. | ||
| It is possible to do things as follows: | ||
| I_{dsat} | ||
| R^2 | ||
| V^{2e} | ||
| to indicate indices or exponents. The command _ indicates that the next | ||
| character will be an index. The command ^ indicates that the next character | ||
| is an exponent. If more of one character must be put, put them in braces. | ||
| Use \_ to enter a bar and \^ to enter a caret. | ||
| <pre> | ||
| This file is part of FidoCadJ. | ||
| FidoCadJ is free software: you can redistribute it and/or modify | ||
| it under the terms of the GNU General Public License as published by | ||
| the Free Software Foundation, either version 3 of the License, or | ||
| (at your option) any later version. | ||
| FidoCadJ 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 General Public License for more details. | ||
| You should have received a copy of the GNU General Public License | ||
| along with FidoCadJ. If not, | ||
| @see <a href=http://www.gnu.org/licenses/>http://www.gnu.org/licenses/</a>. | ||
| Copyright 2020 by Davide Bucci | ||
| </pre> | ||
| */ | ||
| public class DecoratedText | ||
| { | ||
| GraphicsInterface g; | ||
|
|
||
| public DecoratedText(GraphicsInterface g) | ||
| { | ||
| this.g=g; | ||
| } | ||
|
|
||
| /** Get the width of the given string with the current font. | ||
| @param s the string to be used. | ||
| @return the width of the string, in pixels. | ||
| */ | ||
| public int getStringWidth(String s) | ||
| { | ||
| return g.getStringWidth(s); | ||
| } | ||
|
|
||
| StringBuffer btoken; | ||
| String bstr; | ||
| int currentIndex; | ||
| int lastIndex; | ||
| int exponentLevel; | ||
|
|
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| final static int CHUNK = 0; | ||
| final static int INDEX = 1; | ||
| final static int EXPONENT = 2; | ||
| final static int END = 3; | ||
|
|
||
| private int getToken() | ||
| { | ||
| if(currentIndex >= lastIndex) | ||
| return END; | ||
| char c=bstr.charAt(currentIndex); | ||
| if(c=='_') { | ||
| ++currentIndex; | ||
| return INDEX; | ||
| } else if (c=='^') { | ||
| ++currentIndex; | ||
| return EXPONENT; | ||
| } | ||
| btoken=new StringBuffer(); | ||
| while(true) { | ||
| btoken.append(c); | ||
| ++currentIndex; | ||
|
|
||
| if(currentIndex>=lastIndex) | ||
| return CHUNK; | ||
| c=bstr.charAt(currentIndex); | ||
| if(c=='_' || c=='^') | ||
| return CHUNK; | ||
| } | ||
| } | ||
| private void resetTokenization(String s) | ||
| { | ||
| bstr=s; | ||
| currentIndex=0; | ||
| exponentLevel=0; | ||
| lastIndex=s.length(); | ||
| } | ||
|
|
||
| private float getSizeMultLevel() | ||
| { | ||
| switch((int)Math.abs(exponentLevel)){ | ||
| case 0: | ||
| return 1f; | ||
| case 1: | ||
| return 0.8f; | ||
| case 2: | ||
| return 0.7f; | ||
| case 3: | ||
| return 0.6f; | ||
| default: | ||
| return 0.5f; | ||
| } | ||
| } | ||
| /** Draw a string on the current graphic context. | ||
| @param str the string to be drawn. | ||
| @param x the x coordinate of the starting point. | ||
| @param y the y coordinate of the starting point. | ||
| */ | ||
| public void drawString(String str, | ||
| int x, | ||
| int y) | ||
| { | ||
| /* | ||
| [FIDOCAD] | ||
| FJC A 0.35 | ||
| TY 1 2 4 3 0 0 0 Helvetica 1^2^3^4^5^6^7^8^9 | ||
| */ | ||
| resetTokenization(str); | ||
| int xc=x; | ||
| double fontSize; | ||
| fontSize=g.getFontSize(); | ||
| int t; | ||
| while((t=getToken())!=END) { | ||
| switch(t) { | ||
| case CHUNK: | ||
|
|
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| g.setFontSize(fontSize*getSizeMultLevel()); | ||
| g.drawString(btoken.toString(),xc, | ||
| y-(int)Math.round(exponentLevel*fontSize*0.1)); | ||
| xc+=g.getStringWidth(btoken.toString()); | ||
| break; | ||
| case EXPONENT: | ||
| ++exponentLevel; | ||
| break; | ||
| case INDEX: | ||
| --exponentLevel; | ||
| break; | ||
| case END: | ||
| break; | ||
| default: | ||
| } | ||
| } | ||
| } | ||
| } |
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