Introduce struct line and use it for view->line

Somewhat experimental. This will call get_line_type() on every read line.

diff --git a/tig.c b/tig.c
index 52abe0f..7fca9a8 100644 (file)
--- a/tig.c
+++ b/tig.c
@@ -542,6 +542,11 @@ init_colors(void)
        }
 }
 
+struct line {
+       enum line_type type;
+       void *data;             /* User data */
+};
+
 
 /**
  * ENVIRONMENT VARIABLES
@@ -638,6 +643,7 @@ init_colors(void)
  **/
 
 struct view;
+struct view_ops;
 
 /* The display array of active views and the index of the current view. */
 static struct view *display[2];
@@ -663,24 +669,13 @@ static unsigned int current_view;
 static char ref_commit[SIZEOF_REF]     = "HEAD";
 static char ref_head[SIZEOF_REF]       = "HEAD";
 
-
 struct view {
        const char *name;       /* View name */
        const char *cmd_fmt;    /* Default command line format */
        const char *cmd_env;    /* Command line set via environment */
        const char *id;         /* Points to either of ref_{head,commit} */
 
-       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, unsigned int lineno);
-               /* Read one line; updates view->line. */
-               bool (*read)(struct view *view, char *line);
-               /* Depending on view, change display based on current line. */
-               bool (*enter)(struct view *view);
-       } *ops;
+       struct view_ops *ops;   /* View operations */
 
        char cmd[SIZEOF_CMD];   /* Command buffer */
        char ref[SIZEOF_REF];   /* Hovered commit reference */
@@ -700,7 +695,7 @@ struct view {
 
        /* Buffering */
        unsigned long lines;    /* Total number of lines */
-       void **line;            /* Line index; each line contains user data */
+       struct line *line;      /* Line index */
        unsigned int digits;    /* Number of digits in the lines member. */
 
        /* Loading */
@@ -708,6 +703,17 @@ struct view {
        time_t start_time;
 };
 
+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);
+       /* Read one line; updates view->line. */
+       bool (*read)(struct view *view, struct line *prev, char *data);
+       /* Depending on view, change display based on current line. */
+       bool (*enter)(struct view *view, struct line *line);
+};
+
 static struct view_ops pager_ops;
 static struct view_ops main_ops;
 
@@ -758,13 +764,22 @@ static struct view views[] = {
 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
 
 
+static bool
+draw_view_line(struct view *view, unsigned int lineno)
+{
+       if (view->offset + lineno >= view->lines)
+               return FALSE;
+
+       return view->ops->draw(view, &view->line[view->offset + lineno], lineno);
+}
+
 static void
 redraw_view_from(struct view *view, int lineno)
 {
        assert(0 <= lineno && lineno < view->height);
 
        for (; lineno < view->height; lineno++) {
-               if (!view->ops->draw(view, lineno))
+               if (!draw_view_line(view, lineno))
                        break;
        }
 
@@ -921,7 +936,7 @@ do_scroll_view(struct view *view, int lines, bool redraw)
                wscrl(view->win, lines);
 
                for (; line < end; line++) {
-                       if (!view->ops->draw(view, line))
+                       if (!draw_view_line(view, line))
                                break;
                }
        }
@@ -929,7 +944,7 @@ do_scroll_view(struct view *view, int lines, bool redraw)
        /* Move current line into the view. */
        if (view->lineno < view->offset) {
                view->lineno = view->offset;
-               view->ops->draw(view, 0);
+               draw_view_line(view, 0);
 
        } else if (view->lineno >= view->offset + view->height) {
                if (view->lineno == view->offset + view->height) {
@@ -939,7 +954,7 @@ do_scroll_view(struct view *view, int lines, bool redraw)
                        wclrtoeol(view->win);
                }
                view->lineno = view->offset + view->height - 1;
-               view->ops->draw(view, view->lineno - view->offset);
+               draw_view_line(view, view->lineno - view->offset);
        }
 
        assert(view->offset <= view->lineno && view->lineno < view->lines);
@@ -1048,7 +1063,7 @@ move_view(struct view *view, enum request request, bool redraw)
 
                wmove(view->win, prev_lineno, 0);
                wclrtoeol(view->win);
-               view->ops->draw(view, prev_lineno);
+               draw_view_line(view,  prev_lineno);
        }
 
        /* Check whether the view needs to be scrolled */
@@ -1071,7 +1086,7 @@ move_view(struct view *view, enum request request, bool redraw)
        }
 
        /* Draw the current line */
-       view->ops->draw(view, view->lineno - view->offset);
+       draw_view_line(view, view->lineno - view->offset);
 
        if (!redraw)
                return;
@@ -1143,8 +1158,8 @@ begin_update(struct view *view)
                int i;
 
                for (i = 0; i < view->lines; i++)
-                       if (view->line[i])
-                               free(view->line[i]);
+                       if (view->line[i].data)
+                               free(view->line[i].data);
 
                free(view->line);
                view->line = NULL;
@@ -1160,7 +1175,7 @@ update_view(struct view *view)
 {
        char buffer[BUFSIZ];
        char *line;
-       void **tmp;
+       struct line *tmp;
        /* The number of lines to read. If too low it will cause too much
         * redrawing (and possible flickering), if too high responsiveness
         * will suffer. */
@@ -1183,10 +1198,14 @@ update_view(struct view *view)
        while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
                int linelen = strlen(line);
 
+               struct line *prev = view->lines
+                                 ? &view->line[view->lines - 1]
+                                 : NULL;
+
                if (linelen)
                        line[linelen - 1] = 0;
 
-               if (!view->ops->read(view, line))
+               if (!view->ops->read(view, prev, line))
                        goto alloc_error;
 
                if (lines-- == 1)
@@ -1397,7 +1416,7 @@ view_driver(struct view *view, enum request request)
                        report("Nothing to enter");
                        break;
                }
-               return view->ops->enter(view);
+               return view->ops->enter(view, &view->line[view->lineno]);
 
        case REQ_VIEW_NEXT:
        {
@@ -1477,24 +1496,18 @@ view_driver(struct view *view, enum request request)
  */
 
 static bool
-pager_draw(struct view *view, unsigned int lineno)
+pager_draw(struct view *view, struct line *line, unsigned int lineno)
 {
-       enum line_type type;
-       char *line;
-       int linelen;
+       char *text = line->data;
+       enum line_type type = line->type;
+       int textlen = strlen(text);
        int attr;
 
-       if (view->offset + lineno >= view->lines)
-               return FALSE;
-
-       line = view->line[view->offset + lineno];
-       type = get_line_type(line);
-
        wmove(view->win, lineno, 0);
 
        if (view->offset + lineno == view->lineno) {
                if (type == LINE_COMMIT) {
-                       string_copy(view->ref, line + 7);
+                       string_copy(view->ref, text + 7);
                        string_copy(ref_commit, view->ref);
                }
 
@@ -1505,8 +1518,6 @@ pager_draw(struct view *view, unsigned int lineno)
        attr = get_line_attr(type);
        wattrset(view->win, attr);
 
-       linelen = strlen(line);
-
        if (opt_line_number || opt_tab_size < TABSIZE) {
                static char spaces[] = "                    ";
                int col_offset = 0, col = 0;
@@ -1526,66 +1537,65 @@ pager_draw(struct view *view, unsigned int lineno)
                        col_offset = view->digits + 2;
                }
 
-               while (line && col_offset + col < view->width) {
+               while (text && col_offset + col < view->width) {
                        int cols_max = view->width - col_offset - col;
-                       char *text = line;
+                       char *pos = text;
                        int cols;
 
-                       if (*line == '\t') {
+                       if (*text == '\t') {
+                               text++;
                                assert(sizeof(spaces) > TABSIZE);
-                               line++;
-                               text = spaces;
+                               pos = spaces;
                                cols = opt_tab_size - (col % opt_tab_size);
 
                        } else {
-                               line = strchr(line, '\t');
-                               cols = line ? line - text : strlen(text);
+                               text = strchr(text, '\t');
+                               cols = line ? text - pos : strlen(pos);
                        }
 
-                       waddnstr(view->win, text, MIN(cols, cols_max));
+                       waddnstr(view->win, pos, MIN(cols, cols_max));
                        col += cols;
                }
 
        } else {
                int col = 0, pos = 0;
 
-               for (; pos < linelen && col < view->width; pos++, col++)
-                       if (line[pos] == '\t')
+               for (; pos < textlen && col < view->width; pos++, col++)
+                       if (text[pos] == '\t')
                                col += TABSIZE - (col % TABSIZE) - 1;
 
-               waddnstr(view->win, line, pos);
+               waddnstr(view->win, text, pos);
        }
 
        return TRUE;
 }
 
 static bool
-pager_read(struct view *view, char *line)
+pager_read(struct view *view, struct line *prev, char *line)
 {
        /* Compress empty lines in the help view. */
        if (view == VIEW(REQ_VIEW_HELP) &&
-           !*line &&
-           view->lines &&
-           !*((char *) view->line[view->lines - 1]))
+           !*line && prev && !*((char *) prev->data))
                return TRUE;
 
-       view->line[view->lines] = strdup(line);
-       if (!view->line[view->lines])
+       view->line[view->lines].data = strdup(line);
+       if (!view->line[view->lines].data)
                return FALSE;
 
+       view->line[view->lines].type = get_line_type(line);
+
        view->lines++;
        return TRUE;
 }
 
 static bool
-pager_enter(struct view *view)
+pager_enter(struct view *view, struct line *line)
 {
-       char *line = view->line[view->lineno];
        int split = 0;
 
        if ((view == VIEW(REQ_VIEW_LOG) ||
             view == VIEW(REQ_VIEW_PAGER)) &&
-           get_line_type(line) == LINE_COMMIT) {
+           line->type == LINE_COMMIT) {
                open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
                split = 1;
        }
@@ -1625,20 +1635,16 @@ struct commit {
 };
 
 static bool
-main_draw(struct view *view, unsigned int lineno)
+main_draw(struct view *view, struct line *line, unsigned int lineno)
 {
        char buf[DATE_COLS + 1];
-       struct commit *commit;
+       struct commit *commit = line->data;
        enum line_type type;
        int col = 0;
        size_t timelen;
        size_t authorlen;
        int trimmed;
 
-       if (view->offset + lineno >= view->lines)
-               return FALSE;
-
-       commit = view->line[view->offset + lineno];
        if (!*commit->author)
                return FALSE;
 
@@ -1722,7 +1728,7 @@ main_draw(struct view *view, unsigned int lineno)
 
 /* Reads git log --pretty=raw output and parses it into the commit struct. */
 static bool
-main_read(struct view *view, char *line)
+main_read(struct view *view, struct line *prev, char *line)
 {
        enum line_type type = get_line_type(line);
        struct commit *commit;
@@ -1735,7 +1741,7 @@ main_read(struct view *view, char *line)
 
                line += STRING_SIZE("commit ");
 
-               view->line[view->lines++] = commit;
+               view->line[view->lines++].data = commit;
                string_copy(commit->id, line);
                commit->refs = get_refs(commit->id);
                break;
@@ -1745,12 +1751,16 @@ main_read(struct view *view, char *line)
                char *ident = line + STRING_SIZE("author ");
                char *end = strchr(ident, '<');
 
+               if (!prev)
+                       break;
+
+               commit = prev->data;
+
                if (end) {
                        for (; end > ident && isspace(end[-1]); end--) ;
                        *end = 0;
                }
 
-               commit = view->line[view->lines - 1];
                string_copy(commit->author, ident);
 
                /* Parse epoch and timezone */
@@ -1784,13 +1794,12 @@ main_read(struct view *view, char *line)
                break;
        }
        default:
-               /* We should only ever end up here if there has already been a
-                * commit line, however, be safe. */
-               if (view->lines == 0)
+               if (!prev)
                        break;
 
+               commit = prev->data;
+
                /* Fill in the commit title if it has not already been set. */
-               commit = view->line[view->lines - 1];
                if (commit->title[0])
                        break;
 
@@ -1809,7 +1818,7 @@ main_read(struct view *view, char *line)
 }
 
 static bool
-main_enter(struct view *view)
+main_enter(struct view *view, struct line *line)
 {
        enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;