From 807f4ea3e29030ed6379e5c866974d57458c2e42 Mon Sep 17 00:00:00 2001
From: Ryan Chipman <rchipman@mit.edu>
Date: Tue, 23 Jun 2015 14:23:51 -0400
Subject: Hook up :-commands & keybindings for earlier/later

---
 vis.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

(limited to 'vis.c')

diff --git a/vis.c b/vis.c
index a554081..2529f65 100644
--- a/vis.c
+++ b/vis.c
@@ -341,6 +341,9 @@ static void mark_line(const Arg *arg);
 /* {un,re}do last action, redraw window */
 static void undo(const Arg *arg);
 static void redo(const Arg *arg);
+/* earlier, later action chronologically, redraw window */
+static void earlier(const Arg *arg);
+static void later(const Arg *arg);
 /* either part of multiplier or a movement to begin of line */
 static void zero(const Arg *arg);
 /* hange/delete from the current cursor position to the end of
@@ -416,6 +419,10 @@ static bool cmd_write(Filerange*, enum CmdOpt, const char *argv[]);
 static bool cmd_saveas(Filerange*, enum CmdOpt, const char *argv[]);
 /* filter range through external program argv[1] */
 static bool cmd_filter(Filerange*, enum CmdOpt, const char *argv[]);
+/* switch to the previous saved state of the text, chronologically */
+static bool cmd_earlier(Filerange*, enum CmdOpt, const char *argv[]);
+/* switch to the next saved state of the text, chronologically */
+static bool cmd_later(Filerange*, enum CmdOpt, const char *argv[]);
 
 static void action_reset(Action *a);
 static void switchmode_to(Mode *new_mode);
@@ -947,6 +954,24 @@ static void redo(const Arg *arg) {
 	}
 }
 
+static void earlier(const Arg *arg) {
+	size_t pos = text_earlier(vis->win->file->text);
+	if (pos != EPOS) {
+		view_cursor_to(vis->win->view, pos);
+		/* redraw all windows in case some display the same file */
+		editor_draw(vis);
+	}
+}
+
+static void later(const Arg *arg) {
+	size_t pos = text_later(vis->win->file->text);
+	if (pos != EPOS) {
+		view_cursor_to(vis->win->view, pos);
+		/* redraw all windows in case some display the same file */
+		editor_draw(vis);
+	}
+}
+
 static void zero(const Arg *arg) {
 	if (vis->action.count == 0)
 		movement(&(const Arg){ .i = MOVE_LINE_BEGIN });
@@ -1854,6 +1879,22 @@ static bool cmd_filter(Filerange *range, enum CmdOpt opt, const char *argv[]) {
 	return status == 0;
 }
 
+static bool cmd_earlier(Filerange *range, enum CmdOpt opt, const char *argv[]) {
+	if (argv[1])
+		return false;
+	//TODO eventually support time arguments
+	text_earlier(vis->win->file->text);
+	return true;
+}
+
+static bool cmd_later(Filerange *range, enum CmdOpt opt, const char *argv[]) {
+	if (argv[1])
+		return false;
+	//TODO eventually support time arguments
+	text_later(vis->win->file->text);
+	return true;
+}
+
 static Filepos parse_pos(char **cmd) {
 	size_t pos = EPOS;
 	View *view = vis->win->view;
-- 
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