static void die(const char *err, ...);
static void report(const char *msg, ...);
static void set_nonblocking_input(bool loading);
+static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
#define ABS(x) ((x) >= 0 ? (x) : -(x))
#define MIN(x, y) ((x) < (y) ? (x) : (y))
#define DATE_FORMAT "%Y-%m-%d %H:%M"
#define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
+#define AUTHOR_COLS 20
+
/* The default interval between line numbers. */
#define NUMBER_INTERVAL 1
REQ_STOP_LOADING,
REQ_TOGGLE_LINE_NUMBERS,
REQ_VIEW_NEXT,
+ REQ_VIEW_CLOSE,
REQ_MOVE_UP,
REQ_MOVE_UP_ENTER,
* -------
**/
+static const char usage[] =
+VERSION " (" __DATE__ ")\n"
+"\n"
+"Usage: tig [options]\n"
+" or: tig [options] [--] [git log options]\n"
+" or: tig [options] log [git log options]\n"
+" or: tig [options] diff [git diff options]\n"
+" or: tig [options] show [git show options]\n"
+" or: tig [options] < [git command output]\n"
+"\n"
+"Options:\n"
+" -l Start up in log view\n"
+" -d Start up in diff view\n"
+" -n[I], --line-number[=I] Show line numbers with given interval\n"
+" -t[N], --tab-size[=N] Set number of spaces for tab expansion\n"
+" -- Mark end of tig options\n"
+" -v, --version Show version and exit\n"
+" -h, --help Show help message and exit\n";
+
/* Option and state variables. */
static bool opt_line_number = FALSE;
static int opt_num_interval = NUMBER_INTERVAL;
}
/**
+ * -h, --help::
+ * Show help message and exit.
+ **/
+ if (!strcmp(opt, "-h") ||
+ !strcmp(opt, "--help")) {
+ printf(usage);
+ return FALSE;
+ }
+
+ /**
* \--::
* End of tig(1) options. Useful when specifying command
* options for the main view. Example:
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} */
- size_t objsize; /* Size of objects in the line index */
struct view_ops {
/* What type of content being displayed. Used in the
unsigned long offset; /* Offset of the window top */
unsigned long lineno; /* Current line number */
+ /* If non-NULL, points to the view that opened this view. If this view
+ * is closed tig will switch back to the parent view. */
+ struct view *parent;
+
/* Buffering */
unsigned long lines; /* Total number of lines */
void **line; /* Line index; each line contains user data */
static struct view_ops pager_ops;
static struct view_ops main_ops;
-#define VIEW_STR(name, cmd, env, ref, objsize, ops) \
- { name, cmd, #env, ref, objsize, ops }
+#define VIEW_STR(name, cmd, env, ref, ops) \
+ { name, cmd, #env, ref, ops }
-#define VIEW_(id, name, ops, ref, objsize) \
- VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, objsize, ops)
+#define VIEW_(id, name, ops, ref) \
+ VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops)
/**
* Views
**/
static struct view views[] = {
- VIEW_(MAIN, "main", &main_ops, ref_head, sizeof(struct commit)),
- VIEW_(DIFF, "diff", &pager_ops, ref_commit, sizeof(char)),
- VIEW_(LOG, "log", &pager_ops, ref_head, sizeof(char)),
- VIEW_(HELP, "help", &pager_ops, "static", sizeof(char)),
- VIEW_(PAGER, "pager", &pager_ops, "static", sizeof(char)),
+ VIEW_(MAIN, "main", &main_ops, ref_head),
+ VIEW_(DIFF, "diff", &pager_ops, ref_commit),
+ VIEW_(LOG, "log", &pager_ops, ref_head),
+ VIEW_(HELP, "help", &pager_ops, "static"),
+ VIEW_(PAGER, "pager", &pager_ops, "static"),
};
#define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
bool split = !!(flags & OPEN_SPLIT);
bool reload = !!(flags & OPEN_RELOAD);
struct view *view = VIEW(request);
- struct view *displayed;
- int nviews;
-
- /* Cycle between displayed views and count the views. */
- foreach_view (displayed, nviews) {
- if (prev != view &&
- view == displayed &&
- !strcmp(view->vid, prev->vid)) {
- current_view = nviews;
- /* Blur out the title of the previous view. */
- update_view_title(prev);
- report("");
- return;
- }
- }
+ int nviews = display[1] ? 2 : 1;
if (view == prev && nviews == 1 && !reload) {
report("Already in %s view", view->name);
/* Continue loading split views in the background. */
if (!split)
end_update(prev);
+ view->parent = prev;
}
if (view->pipe) {
break;
case REQ_SHOW_VERSION:
- report("Version: %s", VERSION);
+ report("%s (built %s)", VERSION, __DATE__);
return TRUE;
case REQ_SCREEN_RESIZE:
doupdate();
return TRUE;
+ case REQ_VIEW_CLOSE:
+ if (view->parent) {
+ memset(display, 0, sizeof(display));
+ current_view = 0;
+ display[current_view] = view->parent;
+ view->parent = NULL;
+ resize_display();
+ redraw_display();
+ break;
+ }
+ /* Fall-through */
case REQ_QUIT:
return FALSE;
pager_enter(struct view *view)
{
char *line = view->line[view->lineno];
+ int split = 0;
- if (view == VIEW(REQ_VIEW_DIFF)) {
- scroll_view(view, REQ_SCROLL_LINE_DOWN);
- return TRUE;
+ if ((view == VIEW(REQ_VIEW_LOG) ||
+ view == VIEW(REQ_VIEW_PAGER)) &&
+ get_line_type(line) == LINE_COMMIT) {
+ open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
+ split = 1;
}
- if (get_line_type(line) == LINE_COMMIT) {
- if (view == VIEW(REQ_VIEW_LOG))
- open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT | OPEN_BACKGROUNDED);
- else
- open_view(view, REQ_VIEW_DIFF, OPEN_DEFAULT);
- }
+ /* Always scroll the view even if it was split. That way
+ * you can use Enter to scroll through the log view and
+ * split open each commit diff. */
+ scroll_view(view, REQ_SCROLL_LINE_DOWN);
+
+ /* FIXME: A minor workaround. Scrolling the view will call report("")
+ * but if we are scolling a non-current view this won't properly update
+ * the view title. */
+ if (split)
+ update_view_title(view);
return TRUE;
}
enum line_type type;
int col = 0;
size_t timelen;
+ size_t authorlen;
+ int trimmed;
if (view->offset + lineno >= view->lines)
return FALSE;
if (type != LINE_CURSOR)
wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
- if (strlen(commit->author) > 19) {
- waddnstr(view->win, commit->author, 18);
+ /* FIXME: Make this optional, and add i18n.commitEncoding support. */
+ authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
+
+ if (trimmed) {
+ waddnstr(view->win, commit->author, authorlen);
if (type != LINE_CURSOR)
wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
waddch(view->win, '~');
waddstr(view->win, commit->author);
}
- col += 20;
+ col += AUTHOR_COLS;
if (type != LINE_CURSOR)
wattrset(view->win, A_NORMAL);
static bool
main_enter(struct view *view)
{
- open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT | OPEN_BACKGROUNDED);
+ open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
return TRUE;
}
* Switch to pager view.
* h::
* Show man page.
+ * q::
+ * Close view, if multiple views are open it will jump back to the
+ * previous view in the view stack. If it is the last open view it
+ * will quit. Use 'Q' to quit all views at once.
* Enter::
* This key is "context sensitive" depending on what view you are
* currently in. When in log view on a commit line or in the main
{ 'p', REQ_VIEW_PAGER },
{ 'h', REQ_VIEW_HELP },
+ { 'q', REQ_VIEW_CLOSE },
{ KEY_TAB, REQ_VIEW_NEXT },
{ KEY_RETURN, REQ_ENTER },
* Move cursor one line down and enter.
* PgUp::
* b::
+ * -::
* Move cursor one page up.
* PgDown::
* Space::
{ ' ', REQ_MOVE_PAGE_DOWN },
{ KEY_PPAGE, REQ_MOVE_PAGE_UP },
{ 'b', REQ_MOVE_PAGE_UP },
+ { '-', REQ_MOVE_PAGE_UP },
/**
* Scrolling
/*
+ * Unicode / UTF-8 handling
+ *
+ * NOTE: Much of the following code for dealing with unicode is derived from
+ * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
+ * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
+ */
+
+/* I've (over)annotated a lot of code snippets because I am not entirely
+ * confident that the approach taken by this small UTF-8 interface is correct.
+ * --jonas */
+
+static inline int
+unicode_width(unsigned long c)
+{
+ if (c >= 0x1100 &&
+ (c <= 0x115f /* Hangul Jamo */
+ || c == 0x2329
+ || c == 0x232a
+ || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
+ /* CJK ... Yi */
+ || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
+ || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
+ || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
+ || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
+ || (c >= 0xffe0 && c <= 0xffe6)
+ || (c >= 0x20000 && c <= 0x2fffd)
+ || (c >= 0x30000 && c <= 0x3fffd)))
+ return 2;
+
+ return 1;
+}
+
+/* Number of bytes used for encoding a UTF-8 character indexed by first byte.
+ * Illegal bytes are set one. */
+static const unsigned char utf8_bytes[256] = {
+ 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
+ 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,
+ 3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3, 4,4,4,4,4,4,4,4, 5,5,5,5,6,6,1,1,
+};
+
+/* Decode UTF-8 multi-byte representation into a unicode character. */
+static inline unsigned long
+utf8_to_unicode(const char *string, size_t length)
+{
+ unsigned long unicode;
+
+ switch (length) {
+ case 1:
+ unicode = string[0];
+ break;
+ case 2:
+ unicode = (string[0] & 0x1f) << 6;
+ unicode += (string[1] & 0x3f);
+ break;
+ case 3:
+ unicode = (string[0] & 0x0f) << 12;
+ unicode += ((string[1] & 0x3f) << 6);
+ unicode += (string[2] & 0x3f);
+ break;
+ case 4:
+ unicode = (string[0] & 0x0f) << 18;
+ unicode += ((string[1] & 0x3f) << 12);
+ unicode += ((string[2] & 0x3f) << 6);
+ unicode += (string[3] & 0x3f);
+ break;
+ case 5:
+ unicode = (string[0] & 0x0f) << 24;
+ unicode += ((string[1] & 0x3f) << 18);
+ unicode += ((string[2] & 0x3f) << 12);
+ unicode += ((string[3] & 0x3f) << 6);
+ unicode += (string[4] & 0x3f);
+ break;
+ case 6:
+ unicode = (string[0] & 0x01) << 30;
+ unicode += ((string[1] & 0x3f) << 24);
+ unicode += ((string[2] & 0x3f) << 18);
+ unicode += ((string[3] & 0x3f) << 12);
+ unicode += ((string[4] & 0x3f) << 6);
+ unicode += (string[5] & 0x3f);
+ break;
+ default:
+ die("Invalid unicode length");
+ }
+
+ /* Invalid characters could return the special 0xfffd value but NUL
+ * should be just as good. */
+ return unicode > 0xffff ? 0 : unicode;
+}
+
+/* Calculates how much of string can be shown within the given maximum width
+ * and sets trimmed parameter to non-zero value if all of string could not be
+ * shown.
+ *
+ * Additionally, adds to coloffset how many many columns to move to align with
+ * the expected position. Takes into account how multi-byte and double-width
+ * characters will effect the cursor position.
+ *
+ * Returns the number of bytes to output from string to satisfy max_width. */
+static size_t
+utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
+{
+ const char *start = string;
+ const char *end = strchr(string, '\0');
+ size_t mbwidth = 0;
+ size_t width = 0;
+
+ *trimmed = 0;
+
+ while (string < end) {
+ int c = *(unsigned char *) string;
+ unsigned char bytes = utf8_bytes[c];
+ size_t ucwidth;
+ unsigned long unicode;
+
+ if (string + bytes > end)
+ break;
+
+ /* Change representation to figure out whether
+ * it is a single- or double-width character. */
+
+ unicode = utf8_to_unicode(string, bytes);
+ /* FIXME: Graceful handling of invalid unicode character. */
+ if (!unicode)
+ break;
+
+ ucwidth = unicode_width(unicode);
+ width += ucwidth;
+ if (width > max_width) {
+ *trimmed = 1;
+ break;
+ }
+
+ /* The column offset collects the differences between the
+ * number of bytes encoding a character and the number of
+ * columns will be used for rendering said character.
+ *
+ * So if some character A is encoded in 2 bytes, but will be
+ * represented on the screen using only 1 byte this will and up
+ * adding 1 to the multi-byte column offset.
+ *
+ * Assumes that no double-width character can be encoding in
+ * less than two bytes. */
+ if (bytes > ucwidth)
+ mbwidth += bytes - ucwidth;
+
+ string += bytes;
+ }
+
+ *coloffset += mbwidth;
+
+ return string - start;
+}
+
+
+/*
* Status management
*/
/* Whether or not the curses interface has been initialized. */
-bool cursed = FALSE;
+static bool cursed = FALSE;
/* The status window is used for polling keystrokes. */
static WINDOW *status_win;
static struct ref *refs;
static size_t refs_size;
+/* Id <-> ref store */
+static struct ref ***id_refs;
+static size_t id_refs_size;
+
static struct ref **
get_refs(char *id)
{
- struct ref **id_refs = NULL;
- size_t id_refs_size = 0;
+ struct ref ***tmp_id_refs;
+ struct ref **ref_list = NULL;
+ size_t ref_list_size = 0;
size_t i;
+ for (i = 0; i < id_refs_size; i++)
+ if (!strcmp(id, id_refs[i][0]->id))
+ return id_refs[i];
+
+ tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
+ if (!tmp_id_refs)
+ return NULL;
+
+ id_refs = tmp_id_refs;
+
for (i = 0; i < refs_size; i++) {
struct ref **tmp;
if (strcmp(id, refs[i].id))
continue;
- tmp = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
+ tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
if (!tmp) {
- if (id_refs)
- free(id_refs);
+ if (ref_list)
+ free(ref_list);
return NULL;
}
- id_refs = tmp;
- if (id_refs_size > 0)
- id_refs[id_refs_size - 1]->next = 1;
- id_refs[id_refs_size] = &refs[i];
+ ref_list = tmp;
+ if (ref_list_size > 0)
+ ref_list[ref_list_size - 1]->next = 1;
+ ref_list[ref_list_size] = &refs[i];
/* XXX: The properties of the commit chains ensures that we can
* safely modify the shared ref. The repo references will
* always be similar for the same id. */
- id_refs[id_refs_size]->next = 0;
- id_refs_size++;
+ ref_list[ref_list_size]->next = 0;
+ ref_list_size++;
}
- return id_refs;
+ if (ref_list)
+ id_refs[id_refs_size++] = ref_list;
+
+ return ref_list;
}
static int
pclose(pipe);
- if (refs_size == 0)
- die("Not a git repository");
-
return OK;
}
if (load_refs() == ERR)
die("Failed to load refs.");
+ /* Require a git repository unless when running in pager mode. */
+ if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
+ die("Not a git repository");
+
for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
view->cmd_env = getenv(view->cmd_env);
* ----
* Known bugs and problems:
*
+ * - In it's current state tig is pretty much UTF-8 only.
+ *
* - If the screen width is very small the main view can draw
* outside the current view causing bad wrapping. Same goes
* for title and status windows.
~mdw / tig / blobdiff