X-Git-Url: https://git.danieliu.xyz/?a=blobdiff_plain;f=viewer.c;h=0f5d92896ec14c047fc8701b3cf70f01fe4b4726;hb=f92a7609f7b4a6c72a892b16d371528213eca283;hp=8e5e74172d19f62e3a0761ced84d912d04502178;hpb=f4e453fa3619de52dce9d98c5ad1441982c46539;p=smdp.git diff --git a/viewer.c b/viewer.c index 8e5e741..0f5d928 100644 --- a/viewer.c +++ b/viewer.c @@ -1,17 +1,35 @@ #include #include +#include #include "include/parser.h" #include "include/viewer.h" +static short white_ramp[24] = { 16, 232, 233, 234, 235, 236, + 237, 238, 239, 240, 241, 242, + 244, 245, 246, 247, 248, 249, + 250, 251, 252, 253, 254, 255 }; + +static short blue_ramp[24] = { 16, 17, 17, 18, 18, 19, + 19, 20, 20, 21, 27, 32, + 33, 38, 39, 44, 45, 45, + 81, 81, 51, 51, 123, 123 }; + +static short red_ramp[24] = { 16, 52, 52, 53, 53, 89, + 89, 90, 90, 126, 127, 127, + 163, 163, 164, 164, 200, 200, + 201, 201, 207, 207, 213, 213 }; + int ncurses_display(deck_t *deck, int notrans, int nofade) { int c = 0; // char + int l = 0; // line number int colors = 0; // amount of colors supported int fade = 0; // disable color fading by default int trans = -1; // enable transparency if term supports it int max_lines = 0; // max lines per slide int max_cols = 0; // max columns per line + int offset; // text offset // header line 1 is displayed at the top int bar_top = (deck->headers > 0) ? 1 : 0; @@ -33,20 +51,24 @@ int ncurses_display(deck_t *deck, int notrans, int nofade) { slide = slide->next; } + // replace stdin with current tty if markdown input was piped + freopen("/dev/tty", "rw", stdin); + + // init ncurses + initscr(); + if((max_cols > COLS) || (max_lines + bar_top + bar_bottom + 2 > LINES)) { fprintf(stderr, "Error: Terminal size %ix%i to small. Need at least %ix%i.\n", COLS, LINES, max_cols, max_lines + bar_top + bar_bottom + 2); + endwin(); return(1); } // replace stdin with current tty if markdown input was piped freopen("/dev/tty", "rw", stdin); - // init ncurses - initscr(); - // disable cursor curs_set(0); @@ -64,7 +86,7 @@ int ncurses_display(deck_t *deck, int notrans, int nofade) { start_color(); use_default_colors(); - if(!notrans) trans = 0; // 0 is black + if(notrans) trans = 0; // 0 is black if(COLORS == 256) { // 256 color mode @@ -93,31 +115,65 @@ int ncurses_display(deck_t *deck, int notrans, int nofade) { // setup header if(bar_top) { - //TODO move cursor to calculated indentation - wmove(stdscr, 0, 1); - //TODO add text to header - wprintw(stdscr, "header"); + line = deck->header; + offset = next_blank(line->text, 0) + 1; + // add text to header + mvwprintw(stdscr, + 0, (COLS - line->length + offset) / 2, + "%s", &line->text->text[offset]); } // setup footer if(bar_bottom) { - //TODO move cursor to calculated indentation - wmove(stdscr, LINES - 1, 1); - //TODO add text to footer - wprintw(stdscr, "footer"); + line = deck->header->next; + offset = next_blank(line->text, 0) + 1; + // add text to left footer + mvwprintw(stdscr, + LINES - 1, 3, + "%s", &line->text->text[offset]); + + if(deck->headers > 2) { + line = deck->header->next->next; + offset = next_blank(line->text, 0) + 1; + // add text to right footer + mvwprintw(stdscr, + LINES - 1, COLS - line->length + offset - 3, + "%s", &line->text->text[offset]); + } } + // make header + fooder visible + wrefresh(stdscr); + // setup main window - WINDOW *content = newwin(LINES - bar_top - bar_bottom, COLS, 0, 0 + bar_top); + WINDOW *content = newwin(LINES - bar_top - bar_bottom, COLS, 0 + bar_top, 0); if(colors) wbkgd(content, COLOR_PAIR(CP_WHITE)); slide = deck->slide; while(slide) { - // fade out - // print header / footer + // clear main window + werase(content); + + line = slide->line; + l = 0; + // print lines + while(line) { + add_line(content, l, (COLS - max_cols) / 2, line, max_cols); + line = line->next; + l++; + } + + // make content visible + wrefresh(content); + // fade in + if(fade) + fade_in(content, trans, colors); + + // re-enable fading after any undefined key press + if(COLORS == 256 && !nofade) fade = 1; // wait for user input c = getch(); @@ -128,7 +184,9 @@ int ncurses_display(deck_t *deck, int notrans, int nofade) { // show previous slide case KEY_UP: case KEY_LEFT: - case KEY_BACKSPACE: + case 8: // BACKSPACE (ascii) + case 127: // BACKSPACE (xterm) + case 263: // BACKSPACE (getty) case 'h': case 'k': if(slide->prev) @@ -138,7 +196,8 @@ int ncurses_display(deck_t *deck, int notrans, int nofade) { // show next slide case KEY_DOWN: case KEY_RIGHT: - case KEY_ENTER: + case '\n': // ENTER + case ' ': // SPACE case 'j': case 'l': if(slide->next) @@ -147,9 +206,20 @@ int ncurses_display(deck_t *deck, int notrans, int nofade) { // quit case 'q': + // do not fade out on exit + fade = 0; slide = (void*)0; break; + + default: + // disable fading on undefined key press + fade = 0; + break; } + + // fade out + if(fade) + fade_out(content, trans, colors); } endwin(); @@ -157,3 +227,108 @@ int ncurses_display(deck_t *deck, int notrans, int nofade) { return(0); } +void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols) { + int i = 0; // increment + + if(line->text->text) { + int offset = 0; // text offset + offset = next_nonblank(line->text, 0); + + // IS_CODE + if(CHECK_BIT(line->bits, IS_CODE)) { + + // set static offset for code + offset = CODE_INDENT; + + // reverse color for code blocks + wattron(window, A_REVERSE); + + // print whole lines + mvwprintw(window, + y, x, + "%s", &line->text->text[offset]); + + // IS_QUOTE + } else if(CHECK_BIT(line->bits, IS_QUOTE)) { + //TODO replace greater sign with color block + + //FIXME remove dummy print code + mvwprintw(window, + y, x, + "%s", &line->text->text[offset]); + + } else { + + // IF_H1 || IF_H2 + if(CHECK_BIT(line->bits, IS_H1) || CHECK_BIT(line->bits, IS_H2)) { + + // set headline color + wattron(window, COLOR_PAIR(CP_BLUE)); + + // enable underline for H1 + if(CHECK_BIT(line->bits, IS_H1)) + wattron(window, A_UNDERLINE); + + // skip hashes + while(line->text->text[offset] == '#') + offset = next_word(line->text, offset); + + // print whole lines + mvwprintw(window, + y, x, + "%s", &line->text->text[offset]); + + wattroff(window, A_UNDERLINE); + + } else { + //TODO for each char in line + //TODO if *|_ highlight (maybe use a stack here?) + mvwprintw(window, + y, x, + "%s", &line->text->text[offset]); + } + } + + // fill rest off line with spaces + for(i = getcurx(window) - x; i < max_cols; i++) + wprintw(window, "%s", " "); + + // reset to default color + wattron(window, COLOR_PAIR(CP_WHITE)); + wattroff(window, A_UNDERLINE); + wattroff(window, A_REVERSE); + } +} + +void fade_out(WINDOW *window, int trans, int colors) { + int i; // increment + if(colors) { + for(i = 22; i >= 0; i--) { + // darken color pairs + init_pair(CP_WHITE, white_ramp[i], trans); + init_pair(CP_BLUE, blue_ramp[i], trans); + init_pair(CP_RED, red_ramp[i], trans); + // refresh window with new color + wrefresh(window); + // delay for our eyes to recognize the change + usleep(FADE_DELAY); + } + } +} + +void fade_in(WINDOW *window, int trans, int colors) { + int i; // increment + if(colors) { + for(i = 0; i <= 23; i++) { + // lighten color pairs + init_pair(CP_WHITE, white_ramp[i], trans); + init_pair(CP_BLUE, blue_ramp[i], trans); + init_pair(CP_RED, red_ramp[i], trans); + // refresh window with new color + wrefresh(window); + // delay for our eyes to recognize the change + usleep(FADE_DELAY); + } + } +} +