From c3784c9d26a3ea4a6b4c253e9476af08e6d446dc Mon Sep 17 00:00:00 2001
From: Tatsuya Kinoshita <tats@debian.org>
Date: Sat, 3 Jul 2021 14:33:49 +0900
Subject: [PATCH] New option disable_center to disable center alignment

Bug-Debian: https://github.com/tats/w3m/issues/175
Bug-Debian: https://github.com/tats/w3m/issues/185
---
 file.c  | 10 ++++++++--
 fm.h    |  3 ++-
 rc.c    |  3 +++
 table.c |  7 ++++++-
 4 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/file.c b/file.c
index a493935..f2e0563 100644
--- a/file.c
+++ b/file.c
@@ -4319,7 +4319,10 @@ set_alignment(struct readbuffer *obuf, struct parsed_tag *tag)
     if (parsedtag_get_value(tag, ATTR_ALIGN, &align)) {
 	switch (align) {
 	case ALIGN_CENTER:
-	    flag = RB_CENTER;
+	    if (DisableCenter)
+		flag = RB_LEFT;
+	    else
+		flag = RB_CENTER;
 	    break;
 	case ALIGN_RIGHT:
 	    flag = RB_RIGHT;
@@ -5183,7 +5186,10 @@ HTMLtagproc1(struct parsed_tag *tag, struct html_feed_environ *h_env)
 	if (!(obuf->flag & (RB_PREMODE | RB_IGNORE_P)))
 	    flushline(h_env, obuf, envs[h_env->envc].indent, 0, h_env->limit);
 	RB_SAVE_FLAG(obuf);
-	RB_SET_ALIGN(obuf, RB_CENTER);
+	if (DisableCenter)
+	    RB_SET_ALIGN(obuf, RB_LEFT);
+	else
+	    RB_SET_ALIGN(obuf, RB_CENTER);
 	return 1;
     case HTML_N_CENTER:
 	CLOSE_A;
diff --git a/fm.h b/fm.h
index fb31e84..25857f8 100644
--- a/fm.h
+++ b/fm.h
@@ -677,7 +677,7 @@ struct readbuffer {
 #define RB_HTML5	0x400000
 
 #define RB_GET_ALIGN(obuf) ((obuf)->flag&RB_ALIGN)
-#define RB_SET_ALIGN(obuf,align) {(obuf)->flag &= ~RB_ALIGN; (obuf)->flag |= (align); }
+#define RB_SET_ALIGN(obuf,align) do{(obuf)->flag &= ~RB_ALIGN; (obuf)->flag |= (align); }while(0)
 #define RB_SAVE_FLAG(obuf) {\
   if ((obuf)->flag_sp < RB_STACK_SIZE) \
     (obuf)->flag_stack[(obuf)->flag_sp++] = RB_GET_ALIGN(obuf); \
@@ -1125,6 +1125,7 @@ global char UseAltEntity init(FALSE);
 #define GRAPHIC_CHAR_CHARSET 0
 global char UseGraphicChar init(GRAPHIC_CHAR_CHARSET);
 global char DisplayBorders init(FALSE);
+global char DisableCenter init(FALSE);
 extern char *graph_symbol[];
 extern char *graph2_symbol[];
 extern int symbol_width;
diff --git a/rc.c b/rc.c
index 469e6af..9fb08fb 100644
--- a/rc.c
+++ b/rc.c
@@ -92,6 +92,7 @@ static int OptionEncode = FALSE;
 #define CMT_ALT_ENTITY   N_("Use ASCII equivalents to display entities")
 #define CMT_GRAPHIC_CHAR N_("Character type for border of table and menu")
 #define CMT_DISP_BORDERS N_("Display table borders, ignore value of BORDER")
+#define CMT_DISABLE_CENTER N_("Disable center alignment")
 #define CMT_FOLD_TEXTAREA N_("Fold lines in TEXTAREA")
 #define CMT_DISP_INS_DEL N_("Display INS, DEL, S and STRIKE element")
 #define CMT_COLOR        N_("Display with color")
@@ -422,6 +423,8 @@ struct param_ptr params1[] = {
      CMT_GRAPHIC_CHAR, (void *)graphic_char_str},
     {"display_borders", P_CHARINT, PI_ONOFF, (void *)&DisplayBorders,
      CMT_DISP_BORDERS, NULL},
+    {"disable_center", P_CHARINT, PI_ONOFF, (void *)&DisableCenter,
+     CMT_DISABLE_CENTER, NULL},
     {"fold_textarea", P_CHARINT, PI_ONOFF, (void *)&FoldTextarea,
      CMT_FOLD_TEXTAREA, NULL},
     {"display_ins_del", P_INT, PI_SEL_C, (void *)&displayInsDel,
diff --git a/table.c b/table.c
index f385d26..47a80c9 100644
--- a/table.c
+++ b/table.c
@@ -616,12 +616,17 @@ print_item(struct table *t, int row, int col, int width, Str buf)
 	    alignment = ALIGN_RIGHT;
 	else if ((t->tabattr[row][col] & HTT_ALIGN) == HTT_CENTER)
 	    alignment = ALIGN_CENTER;
+	if (DisableCenter && alignment == ALIGN_CENTER)
+	    alignment = ALIGN_LEFT;
 	align(lbuf, width, alignment);
 	Strcat(buf, lbuf->line);
     }
     else {
 	lbuf = newTextLine(NULL, 0);
-	align(lbuf, width, ALIGN_CENTER);
+	if (DisableCenter)
+	    align(lbuf, width, ALIGN_LEFT);
+	else
+	    align(lbuf, width, ALIGN_CENTER);
 	Strcat(buf, lbuf->line);
     }
 }