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Cleanup/inlining/documentation

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This commit is contained in:
Bruce Hill 2021-07-15 20:16:52 -07:00
parent 5df6f972d4
commit fe75508665
1 changed files with 25 additions and 14 deletions
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39
draw.c
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@ -29,6 +29,9 @@ column_t column_info[255] = {
['r'] = {.name = "Random", .render = col_random},
};
//
// Left-pad a string with spaces.
//
static void lpad(char *buf, int width)
{
int len = strlen(buf);
@ -39,6 +42,9 @@ static void lpad(char *buf, int width)
}
}
//
// Append a string to an existing string, but with escape sequences made explicit.
//
static char* stpcpy_escaped(char *buf, const char *str, const char *color)
{
static const char *escapes = " abtnvfr e";
@ -79,17 +85,8 @@ static int fputs_escaped(FILE *f, const char *str, const char *color)
}
//
// Returns the color of a file listing, given its mode.
// Return a human-readable string representing how long ago a time was.
//
static const char* color_of(mode_t mode)
{
if (S_ISDIR(mode)) return DIR_COLOR;
else if (S_ISLNK(mode)) return LINK_COLOR;
else if (mode & (S_IXUSR | S_IXGRP | S_IXOTH))
return EXECUTABLE_COLOR;
else return NORMAL_COLOR;
}
static void timeago(char *buf, time_t t)
{
const int SECOND = 1;
@ -213,6 +210,9 @@ void col_name(entry_t *entry, const char *color, char *buf, int width)
buf = stpcpy(buf, "\033[22;23m");
}
//
// Calculate the column widths.
//
int *get_column_widths(char columns[], int width)
{
// TODO: maybe memoize
@ -235,6 +235,9 @@ int *get_column_widths(char columns[], int width)
return colwidths;
}
//
// Draw the column header labels.
//
void draw_column_labels(FILE *out, char columns[], char *sort, int width)
{
int *colwidths = get_column_widths(columns, width);
@ -260,6 +263,9 @@ void draw_column_labels(FILE *out, char columns[], char *sort, int width)
fputs(" \033[K\033[0m", out);
}
//
// Draw a row (one file).
//
void draw_row(FILE *out, char columns[], entry_t *entry, const char *color, int width)
{
int *colwidths = get_column_widths(columns, width);
@ -283,8 +289,8 @@ void draw_row(FILE *out, char columns[], entry_t *entry, const char *color, int
//
// Draw everything to the screen.
// If `dirty` is false, then use terminal scrolling to move the file listing
// around and only update the files that have changed.
// If `bb->dirty` is false, then use terminal scrolling to move the file
// listing around and only update the files that have changed.
//
void render(FILE *out, bb_t *bb)
{
@ -345,8 +351,13 @@ void render(FILE *out, bb_t *bb)
}
entry_t *entry = files[i];
const char *color = i == bb->cursor ?
CURSOR_COLOR : color_of(entry->info.st_mode);
const char *color = NORMAL_COLOR;
if (i == bb->cursor) color = CURSOR_COLOR;
else if (S_ISDIR(entry->info.st_mode)) color = DIR_COLOR;
else if (S_ISLNK(entry->info.st_mode)) color = LINK_COLOR;
else if (entry->info.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
color = EXECUTABLE_COLOR;
int x = 0, y = i - bb->scroll + 2;
move_cursor(out, x, y);
draw_row(out, bb->columns, entry, color, winsize.ws_col-1);