X-Git-Url: https://git.distorted.org.uk/~mdw/tig/blobdiff_plain/f0f114ac9b184c90d9bd371ec99792d96b9a890c..e314c36d0422488191aea046b2485d5a22c2c791:/tig.c

diff --git a/tig.c b/tig.c
index 5e75b5a..ca380a3 100644
--- a/tig.c
+++ b/tig.c
@@ -173,6 +173,9 @@ string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
 #define string_ncopy(dst, src, srclen) \
 	string_ncopy_do(dst, sizeof(dst), src, srclen)
 
+#define string_copy_rev(dst, src) \
+	string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
+
 static char *
 chomp_string(char *name)
 {
@@ -870,7 +873,7 @@ get_key(enum request request)
 	static char buf[BUFSIZ];
 	static char key_char[] = "'X'";
 	size_t pos = 0;
-	char *sep = "    ";
+	char *sep = "";
 	int i;
 
 	buf[pos] = 0;
@@ -1231,10 +1234,12 @@ struct view {
 struct view_ops {
 	/* What type of content being displayed. Used in the title bar. */
 	const char *type;
-	/* Draw one line; @lineno must be < view->height. */
-	bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
+	/* Open and reads in all view content. */
+	bool (*open)(struct view *view);
 	/* Read one line; updates view->line. */
 	bool (*read)(struct view *view, char *data);
+	/* Draw one line; @lineno must be < view->height. */
+	bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
 	/* Depending on view, change display based on current line. */
 	bool (*enter)(struct view *view, struct line *line);
 	/* Search for regex in a line. */
@@ -1247,6 +1252,7 @@ static struct view_ops pager_ops;
 static struct view_ops main_ops;
 static struct view_ops tree_ops;
 static struct view_ops blob_ops;
+static struct view_ops help_ops;
 
 #define VIEW_STR(name, cmd, env, ref, ops, map) \
 	{ name, cmd, #env, ref, ops, map}
@@ -1261,8 +1267,8 @@ static struct view views[] = {
 	VIEW_(LOG,   "log",   &pager_ops, ref_head),
 	VIEW_(TREE,  "tree",  &tree_ops,  ref_commit),
 	VIEW_(BLOB,  "blob",  &blob_ops,  ref_blob),
-	VIEW_(HELP,  "help",  &pager_ops, "static"),
-	VIEW_(PAGER, "pager", &pager_ops, "static"),
+	VIEW_(HELP,  "help",  &help_ops,  ""),
+	VIEW_(PAGER, "pager", &pager_ops, ""),
 };
 
 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
@@ -1783,9 +1789,10 @@ begin_update(struct view *view)
 	if (opt_cmd[0]) {
 		string_copy(view->cmd, opt_cmd);
 		opt_cmd[0] = 0;
-		/* When running random commands, the view ref could have become
-		 * invalid so clear it. */
-		view->ref[0] = 0;
+		/* When running random commands, initially show the
+		 * command in the title. However, it maybe later be
+		 * overwritten if a commit line is selected. */
+		string_copy(view->ref, view->cmd);
 
 	} else if (view == VIEW(REQ_VIEW_TREE)) {
 		const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
@@ -1804,6 +1811,12 @@ begin_update(struct view *view)
 
 		if (!string_format(view->cmd, format, id, id, id, id, id))
 			return FALSE;
+
+		/* Put the current ref_* value to the view title ref
+		 * member. This is needed by the blob view. Most other
+		 * views sets it automatically after loading because the
+		 * first line is a commit line. */
+		string_copy(view->ref, id);
 	}
 
 	/* Special case for the pager view. */
@@ -1822,7 +1835,7 @@ begin_update(struct view *view)
 	view->offset = 0;
 	view->lines  = 0;
 	view->lineno = 0;
-	string_copy(view->vid, id);
+	string_copy_rev(view->vid, id);
 
 	if (view->line) {
 		int i;
@@ -1970,65 +1983,30 @@ end:
 }
 
 static struct line *
-add_line_text(struct view *view, char *data, enum line_type type)
+add_line_data(struct view *view, void *data, enum line_type type)
 {
-	struct line *line = &view->line[view->lines];
-
-	if (!data)
-		return NULL;
-
-	line->data = strdup(data);
-	if (!line->data)
-		return NULL;
+	struct line *line = &view->line[view->lines++];
 
+	memset(line, 0, sizeof(*line));
 	line->type = type;
-	view->lines++;
+	line->data = data;
 
 	return line;
 }
 
-
-/*
- * View opening
- */
-
-static void open_help_view(struct view *view)
+static struct line *
+add_line_text(struct view *view, char *data, enum line_type type)
 {
-	char buf[BUFSIZ];
-	int lines = ARRAY_SIZE(req_info) + 2;
-	int i;
+	if (data)
+		data = strdup(data);
 
-	if (view->lines > 0)
-		return;
-
-	for (i = 0; i < ARRAY_SIZE(req_info); i++)
-		if (!req_info[i].request)
-			lines++;
-
-	view->line = calloc(lines, sizeof(*view->line));
-	if (!view->line) {
-		report("Allocation failure");
-		return;
-	}
-
-	add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
-
-	for (i = 0; i < ARRAY_SIZE(req_info); i++) {
-		char *key;
-
-		if (!req_info[i].request) {
-			add_line_text(view, "", LINE_DEFAULT);
-			add_line_text(view, req_info[i].help, LINE_DEFAULT);
-			continue;
-		}
+	return data ? add_line_data(view, data, type) : NULL;
+}
 
-		key = get_key(req_info[i].request);
-		if (!string_format(buf, "%-25s %s", key, req_info[i].help))
-			continue;
 
-		add_line_text(view, buf, LINE_DEFAULT);
-	}
-}
+/*
+ * View opening
+ */
 
 enum open_flags {
 	OPEN_DEFAULT = 0,	/* Use default view switching. */
@@ -2052,8 +2030,11 @@ open_view(struct view *prev, enum request request, enum open_flags flags)
 		return;
 	}
 
-	if (view == VIEW(REQ_VIEW_HELP)) {
-		open_help_view(view);
+	if (view->ops->open) {
+		if (!view->ops->open(view)) {
+			report("Failed to load %s view", view->name);
+			return;
+		}
 
 	} else if ((reload || strcmp(view->vid, view->id)) &&
 		   !begin_update(view)) {
@@ -2141,16 +2122,27 @@ view_driver(struct view *view, enum request request)
 
 	case REQ_VIEW_BLOB:
 		if (!ref_blob[0]) {
-			report("No file chosen, press 't' to open tree view");
+			report("No file chosen, press %s to open tree view",
+			       get_key(REQ_VIEW_TREE));
 			break;
 		}
-		/* Fall-through */
+		open_view(view, request, OPEN_DEFAULT);
+		break;
+
+	case REQ_VIEW_PAGER:
+		if (!VIEW(REQ_VIEW_PAGER)->lines) {
+			report("No pager content, press %s to run command from prompt",
+			       get_key(REQ_PROMPT));
+			break;
+		}
+		open_view(view, request, OPEN_DEFAULT);
+		break;
+
 	case REQ_VIEW_MAIN:
 	case REQ_VIEW_DIFF:
 	case REQ_VIEW_LOG:
 	case REQ_VIEW_TREE:
 	case REQ_VIEW_HELP:
-	case REQ_VIEW_PAGER:
 		open_view(view, request, OPEN_DEFAULT);
 		break;
 
@@ -2486,17 +2478,73 @@ static void
 pager_select(struct view *view, struct line *line)
 {
 	if (line->type == LINE_COMMIT) {
-		char *text = line->data;
+		char *text = line->data + STRING_SIZE("commit ");
 
-		string_copy(view->ref, text + STRING_SIZE("commit "));
-		string_copy(ref_commit, view->ref);
+		if (view != VIEW(REQ_VIEW_PAGER))
+			string_copy_rev(view->ref, text);
+		string_copy_rev(ref_commit, text);
 	}
 }
 
 static struct view_ops pager_ops = {
 	"line",
-	pager_draw,
+	NULL,
 	pager_read,
+	pager_draw,
+	pager_enter,
+	pager_grep,
+	pager_select,
+};
+
+
+/*
+ * Help backend
+ */
+
+static bool
+help_open(struct view *view)
+{
+	char buf[BUFSIZ];
+	int lines = ARRAY_SIZE(req_info) + 2;
+	int i;
+
+	if (view->lines > 0)
+		return TRUE;
+
+	for (i = 0; i < ARRAY_SIZE(req_info); i++)
+		if (!req_info[i].request)
+			lines++;
+
+	view->line = calloc(lines, sizeof(*view->line));
+	if (!view->line)
+		return FALSE;
+
+	add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
+
+	for (i = 0; i < ARRAY_SIZE(req_info); i++) {
+		char *key;
+
+		if (!req_info[i].request) {
+			add_line_text(view, "", LINE_DEFAULT);
+			add_line_text(view, req_info[i].help, LINE_DEFAULT);
+			continue;
+		}
+
+		key = get_key(req_info[i].request);
+		if (!string_format(buf, "    %-25s %s", key, req_info[i].help))
+			continue;
+
+		add_line_text(view, buf, LINE_DEFAULT);
+	}
+
+	return TRUE;
+}
+
+static struct view_ops help_ops = {
+	"line",
+	help_open,
+	NULL,
+	pager_draw,
 	pager_enter,
 	pager_grep,
 	pager_select,
@@ -2664,27 +2712,23 @@ tree_enter(struct view *view, struct line *line)
 static void
 tree_select(struct view *view, struct line *line)
 {
-	char *text = line->data;
-
-	text += STRING_SIZE("100644 blob ");
+	char *text = line->data + STRING_SIZE("100644 blob ");
 
 	if (line->type == LINE_TREE_FILE) {
-		string_ncopy(ref_blob, text, 40);
-		/* Also update the blob view's ref, since all there must always
-		 * be in sync. */
-		string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
+		string_copy_rev(ref_blob, text);
 
 	} else if (line->type != LINE_TREE_DIR) {
 		return;
 	}
 
-	string_ncopy(view->ref, text, 40);
+	string_copy_rev(view->ref, text);
 }
 
 static struct view_ops tree_ops = {
 	"file",
-	pager_draw,
+	NULL,
 	tree_read,
+	pager_draw,
 	tree_enter,
 	pager_grep,
 	tree_select,
@@ -2698,8 +2742,9 @@ blob_read(struct view *view, char *line)
 
 static struct view_ops blob_ops = {
 	"line",
-	pager_draw,
+	NULL,
 	blob_read,
+	pager_draw,
 	pager_enter,
 	pager_grep,
 	pager_select,
@@ -3046,10 +3091,10 @@ main_read(struct view *view, char *line)
 
 		line += STRING_SIZE("commit ");
 
-		view->line[view->lines++].data = commit;
-		string_copy(commit->id, line);
+		string_copy_rev(commit->id, line);
 		commit->refs = get_refs(commit->id);
 		graph->commit = commit;
+		add_line_data(view, commit, LINE_MAIN_COMMIT);
 		break;
 
 	case LINE_PARENT:
@@ -3182,14 +3227,15 @@ main_select(struct view *view, struct line *line)
 {
 	struct commit *commit = line->data;
 
-	string_copy(view->ref, commit->id);
-	string_copy(ref_commit, view->ref);
+	string_copy_rev(view->ref, commit->id);
+	string_copy_rev(ref_commit, view->ref);
 }
 
 static struct view_ops main_ops = {
 	"commit",
-	main_draw,
+	NULL,
 	main_read,
+	main_draw,
 	main_enter,
 	main_grep,
 	main_select,
@@ -3620,7 +3666,7 @@ read_ref(char *id, int idlen, char *name, int namelen)
 	ref->name[namelen] = 0;
 	ref->tag = tag;
 	ref->remote = remote;
-	string_copy(ref->id, id);
+	string_copy_rev(ref->id, id);
 
 	return OK;
 }