Ability to erase the line at the end of a readLine call, fixes #181

jline · Oct 10, 2017 · 3fa869c · 3fa869c
1 parent 7b3acf1
commit 3fa869c
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Showing 2 changed files with 21 additions and 1 deletion.
diff --git a/reader/src/main/java/org/jline/reader/LineReader.java b/reader/src/main/java/org/jline/reader/LineReader.java
@@ -365,7 +365,13 @@ enum Option {
         INSERT_TAB(true),
         MOUSE,
         DISABLE_HIGHLIGHTER,
-        BRACKETED_PASTE(true);
+        BRACKETED_PASTE(true),
+        /**
+         * Instead of printing a new line when the line is read, the entire line
+         * (including the prompt) will be erased, thereby leaving the screen as it
+         * was before the readLine call.
+         */
+        ERASE_LINE_ON_FINISH;
 
         private final boolean def;
 

diff --git a/reader/src/main/java/org/jline/reader/impl/LineReaderImpl.java b/reader/src/main/java/org/jline/reader/impl/LineReaderImpl.java
@@ -2239,6 +2239,20 @@ protected int getViRange(Reference cmd, ViMoveMode mode) {
     */
 
     protected void cleanup() {
+        if (isSet(Option.ERASE_LINE_ON_FINISH)) {
+            Buffer oldBuffer = buf.copy();
+            AttributedString oldPrompt = prompt;
+            buf.clear();
+            prompt = new AttributedString("");
+            doCleanup();
+            prompt = oldPrompt;
+            buf.copyFrom(oldBuffer);
+        } else {
+            doCleanup();
+        }
+    }
+
+    protected void doCleanup() {
         buf.cursor(buf.length());
         post = null;
         if (size.getColumns() > 0 || size.getRows() > 0) {