svn commit: r1410555 - /pivot/trunk/wtk/src/org/apache/pivot/wtk/TextArea.java

[rwhitcomb]

Author: rwhitcomb
Date: Fri Nov 16 20:18:20 2012
New Revision: 1410555

URL: http://svn.apache.org/viewvc?rev=1410555&view=rev
Log:
Part of PIVOT-696: Add support for viewing tab characters in TextArea.

Already the TerraTextAreaSkin has a "tabWidth" style, and supports
Ctrl-Tab entering a "tab" which is a number of spaces up to the tab
width.

The previous change added conversion of tab to spaces in "setText".
This change extends that to "insertText", so that (in particular)
"paste" looks right too.

Modified:
    pivot/trunk/wtk/src/org/apache/pivot/wtk/TextArea.java

Modified: pivot/trunk/wtk/src/org/apache/pivot/wtk/TextArea.java
URL: 
http://svn.apache.org/viewvc/pivot/trunk/wtk/src/org/apache/pivot/wtk/TextArea.java?rev=1410555&r1=1410554&r2=1410555&view=diff
==============================================================================
--- pivot/trunk/wtk/src/org/apache/pivot/wtk/TextArea.java (original)
+++ pivot/trunk/wtk/src/org/apache/pivot/wtk/TextArea.java Fri Nov 16 20:18:20 
2012
@@ -735,8 +735,8 @@ public class TextArea extends Component 
                         throw new IllegalArgumentException("Text length is 
greater than maximum length.");
                     }
                     paragraph.append(' ');
-                    tabPosition++;
                 }
+                tabPosition += spaces;
             } else {
                 paragraph.append((char)c);
                 tabPosition++;
@@ -775,6 +775,8 @@ public class TextArea extends Component 
             Paragraph paragraph = paragraphs.get(paragraphIndex);
 
             int characterOffset = index - paragraph.offset;
+            int tabPosition = characterOffset;
+            int tabWidth = ((TextArea.Skin)getSkin()).getTabWidth();
 
             StringBuilder textBuilder = new StringBuilder();
 
@@ -793,11 +795,19 @@ public class TextArea extends Component 
                     paragraph.insertText(trailingCharacters, 0);
                     paragraphSequence.insert(paragraph, ++paragraphIndex);
                     characterOffset = 0;
+                    tabPosition = 0;
 
                     textBuilder = new StringBuilder();
+                } else if (c == '\t') {
+                    int spaces = tabWidth - (tabPosition % tabWidth);
+                    for (int j = 0; j < spaces; j++) {
+                        textBuilder.append(' ');
+                    }
+                    tabPosition += spaces;
                 } else {
                     // Append character
                     textBuilder.append(c);
+                    tabPosition++;
                 }
             }