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Theme Editor: increment/decrement color parts (red, green, blue or alpha) at caret using Ctrl+UP/Ctrl+DOWN

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This commit is contained in:
Karl Tauber
2021-08-22 17:26:29 +02:00
parent 6578f25cc9
commit 1759f6b25c
1 changed files with 89 additions and 0 deletions
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89
flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatSyntaxTextAreaActions.java
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@@ -92,15 +92,24 @@ class FlatSyntaxTextAreaActions
@Override
public void actionPerformedImpl( ActionEvent e, RTextArea textArea ) {
if( !incrementRGBColor( textArea ) )
incrementNumber( textArea );
}
private void incrementNumber( RTextArea textArea ) {
try {
int caretPosition = textArea.getCaretPosition();
int start = caretPosition;
int end = caretPosition;
// find first digit
for( int i = caretPosition - 1; i >= 0; i-- ) {
if( !Character.isDigit( textArea.getText( i, 1 ).charAt( 0 ) ) )
break;
start = i;
}
// find last digit
int length = textArea.getDocument().getLength();
for( int i = caretPosition; i < length; i++ ) {
if( !Character.isDigit( textArea.getText( i, 1 ).charAt( 0 ) ) )
@@ -111,8 +120,11 @@ class FlatSyntaxTextAreaActions
if( start == end )
return;
// parse number
String str = textArea.getText( start, end - start );
long number = Long.parseLong( str );
// increment/decrement number
if( increment )
number++;
else
@@ -121,12 +133,89 @@ class FlatSyntaxTextAreaActions
if( number < 0 )
return;
// update editor
textArea.replaceRange( Long.toString( number ), start, end );
} catch( BadLocationException | IndexOutOfBoundsException | NumberFormatException ex ) {
ex.printStackTrace();
}
}
private boolean incrementRGBColor( RTextArea textArea ) {
try {
int caretPosition = textArea.getCaretPosition();
int start = caretPosition;
int end = caretPosition;
// find first '#' or hex digit
for( int i = caretPosition - 1; i >= 0; i-- ) {
char ch = textArea.getText( i, 1 ).charAt( 0 );
if( ch != '#' && !isHexDigit( ch ) )
break;
start = i;
}
// find last hex digit
int length = textArea.getDocument().getLength();
for( int i = caretPosition; i < length; i++ ) {
if( !isHexDigit( textArea.getText( i, 1 ).charAt( 0 ) ) )
break;
end = i + 1;
}
// check for valid length (#RGB, #RGBA, #RRGGBB or #RRGGBBAA)
int len = end - start;
if( len != 4 && len != 5 && len != 7 && len != 9 )
return false;
// check whether starts with '#'
if( textArea.getText( start, 1 ).charAt( 0 ) != '#' )
return false;
// find start of color part that should be changed (red, green, blue or alpha)
int start2;
int hexDigitCount = (len == 4 || len == 5) ? 1 : 2;
if( hexDigitCount == 1 ) {
// #RGB or #RGBA
start2 = caretPosition - 1;
} else {
// #RRGGBB or #RRGGBBAA
int offset = caretPosition - (start + 1);
offset += (offset % 2);
start2 = start + 1 + offset - 2;
}
start2 = Math.max( start2, start + 1 );
// parse number
String str = textArea.getText( start2, hexDigitCount );
int number = Integer.parseInt( str, 16 );
// increment/decrement number
if( increment )
number++;
else
number--;
// wrap numbers if less than zero or too large
int maxNumber = (hexDigitCount == 1) ? 15 : 255;
if( number < 0 )
number = maxNumber;
else if( number > maxNumber )
number = 0;
// update editor
String newStr = String.format( hexDigitCount == 1 ? "%1x" : "%02x", number );
textArea.replaceRange( newStr, start2, start2 + hexDigitCount );
return true;
} catch( BadLocationException | IndexOutOfBoundsException | NumberFormatException ex ) {
ex.printStackTrace();
return false;
}
}
private boolean isHexDigit( char ch ) {
return Character.isDigit( ch ) || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F');
}
@Override
public String getMacroID() {
return getName();