Support %(text) in all views with a text column

PR #457 implemented %(text) for the pager view only. Extend %(text) support
to the blame, blob, grep and log views.

Fixes #1275

src/blame.c

@@ -466,6 +466,7 @@ blame_select(struct view *view, struct line *line)
 {
 	struct blame *blame = line->data;
 	struct blame_commit *commit = blame->commit;
+	const char *text = blame->text;
 
 	if (!commit)
 		return;
@@ -481,6 +482,7 @@ blame_select(struct view *view, struct line *line)
 		view->env->file_old[0] = '\0';
 
 	view->env->lineno = view->pos.lineno + 1;
+	string_ncopy(view->env->text, text, strlen(text));
 }
 
 static struct view_ops blame_ops = {

src/blob.c

@@ -111,10 +111,12 @@ static void
 blob_select(struct view *view, struct line *line)
 {
 	struct blob_state *state = view->private;
+	const char *text = box_text(line);
 
 	if (state->file)
 		string_format(view->env->file, "%s", state->file);
 	view->env->lineno = view->pos.lineno + 1;
+	string_ncopy(view->env->text, text, strlen(text));
 }
 
 static enum request

src/grep.c

@@ -77,13 +77,15 @@ static void
 grep_select(struct view *view, struct line *line)
 {
 	struct grep_line *grep = grep_get_line(line);
+	const char *text = grep->text;
 
 	if (!*grep->file)
 		return;
 	view->env->ref[0] = 0;
 	string_ncopy(view->env->file, grep->file, strlen(grep->file));
 	string_ncopy(view->ref, grep->file, strlen(grep->file));
 	view->env->lineno = grep->lineno + 1;
+	string_ncopy(view->env->text, text, strlen(text));
 }
 
 static const char *grep_args[] = {

src/log.c

@@ -44,6 +44,7 @@ log_select(struct view *view, struct line *line)
 {
 	struct log_state *state = view->private;
 	int last_lineno = state->last_lineno;
+	const char *text = box_text(line);
 
 	if (!last_lineno || abs(last_lineno - line->lineno) > 1
 	    || (state->last_type == LINE_COMMIT && last_lineno > line->lineno)) {
@@ -56,6 +57,7 @@ log_select(struct view *view, struct line *line)
 	if (line->type == LINE_COMMIT && !view_has_flags(view, VIEW_NO_REF))
 		log_copy_rev(view, line);
 	string_copy_rev(view->env->commit, view->ref);
+	string_ncopy(view->env->text, text, strlen(text));
 	state->last_lineno = line->lineno;
 	state->last_type = line->type;
 }