From: Michael D. Lowis <mike@mdlowis.com>
Date: Sun, 21 May 2017 01:14:50 +0000 (-0400)
Subject: Added logic to trim trailing whitespace on save
X-Git-Url: https://git.mdlowis.com/?a=commitdiff_plain;h=0bd63c241bf366427968a592722d386988faa78b;p=projs%2Ftide.git

Added logic to trim trailing whitespace on save
---

diff --git a/TODO.md b/TODO.md
index 563aadd..0709aac 100644
--- a/TODO.md
+++ b/TODO.md
@@ -2,14 +2,14 @@
 
 Up Next:
 
-* refactor selection handling to buf.c to prepare fo rmultiple selections.
-* refactor x11.c and win.c
-* Make Fn keys execute nth command in the tags buffers
 * Run commands in the background and don't block the main thread.
+* refactor selection handling to buf.c to prepare for multiple selections.
+* right click to fetch file or line
+* Make Fn keys execute nth command in the tags buffers
 * check for file changes on save
 * check for file changes when window regains focus
 * 100% coverage with unit and unit-integration tests
-* right click to fetch file or line
+* refactor x11.c and win.c
 * Status line should omit characters from beginning of path to make file path fit
 
 Straight-up Bugs:
diff --git a/inc/edit.h b/inc/edit.h
index fd5a2c5..5670ecf 100644
--- a/inc/edit.h
+++ b/inc/edit.h
@@ -221,6 +221,7 @@ enum {
     BufSize       = 8192, /* default buffer size */
     FontCacheSize = 16,   /* Maximum number of fonts allowed in the font cache */
     EventTimeout  = 100,  /* Maximum blocking wait time for events */
+    TrimOnSave    = 1,    /* Enable trimming of trailing whitespace on save */
 #ifdef __MACH__
     LineSpacing   = 0,    /* Number of pixels for spacing between lines */
 #else
diff --git a/xedit.c b/xedit.c
index e8c6a55..6f9b796 100644
--- a/xedit.c
+++ b/xedit.c
@@ -127,7 +127,24 @@ static void quit(void) {
 }
 
 static void save(void) {
-    buf_save(win_buf(EDIT));
+    Buf* buf = win_buf(EDIT);
+    if (TrimOnSave) {
+        View* view = win_view(EDIT);
+        unsigned off = 0;
+        while (buf_end(buf) && (off < buf_end(buf)-1)) {
+            off = buf_eol(buf, off);
+            Rune r = buf_get(buf, off-1);
+            for (; (r == ' ' || r == '\t'); r = buf_get(buf, off-1)) {
+                if (off <= view->selection.beg) {
+                    view->selection.end--;
+                    view->selection.beg--;
+                }
+                off = buf_delete(buf, off-1, off);
+            }
+            off = buf_byline(buf, off, +1);
+        }
+    }
+    buf_save(buf);
 }
 
 /* Mouse Handling