From f4e453fa3619de52dce9d98c5ad1441982c46539 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Michael=20G=C3=B6hler?= Date: Fri, 29 Aug 2014 01:41:42 +0200 Subject: [PATCH] a first draft of the ncurses viewer --- include/viewer.h | 24 +++++++ viewer.c | 159 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 183 insertions(+) create mode 100644 include/viewer.h create mode 100644 viewer.c diff --git a/include/viewer.h b/include/viewer.h new file mode 100644 index 0000000..89837ec --- /dev/null +++ b/include/viewer.h @@ -0,0 +1,24 @@ +#if !defined( VIEWER_H ) +#define VIEWER_H + +#define CP_WHITE 1 // 255 +#define CP_BLUE 2 // 123 +#define CP_RED 3 // 213 +#define CP_YELLOW 4 // 208 + +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 }; + +#endif // !defined( VIEWER_H ) diff --git a/viewer.c b/viewer.c new file mode 100644 index 0000000..8e5e741 --- /dev/null +++ b/viewer.c @@ -0,0 +1,159 @@ +#include +#include + +#include "include/parser.h" +#include "include/viewer.h" + +int ncurses_display(deck_t *deck, int notrans, int nofade) { + + int c = 0; // char + 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 + + // header line 1 is displayed at the top + int bar_top = (deck->headers > 0) ? 1 : 0; + // header line 2 and 3 are displayed at the bottom + int bar_bottom = (deck->headers > 1) ? 1 : 0; + + slide_t *slide = deck->slide; + line_t *line; + + while(slide) { + // set max_lines if line count exceeded + max_lines = (slide->lines > max_lines) ? slide->lines : max_lines; + line = slide->line; + while(line) { + // set max_cols if length exceeded + max_cols = (line->length > max_cols) ? line->length : max_cols; + line = line->next; + } + slide = slide->next; + } + + 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); + 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); + + // disable output of keyboard typing + noecho(); + + // make getch() process one char at a time + cbreak(); + + // enable arrow keys + keypad(stdscr,TRUE); + + // set colors + if(has_colors() == TRUE) { + start_color(); + use_default_colors(); + + if(!notrans) trans = 0; // 0 is black + + if(COLORS == 256) { + // 256 color mode + init_pair(CP_WHITE, 255, trans); + init_pair(CP_BLUE, 123, trans); + init_pair(CP_RED, 213, trans); + init_pair(CP_YELLOW, 208, trans); + + // enable color fading + if(!nofade) fade = 1; + } else { + + // 8 color mode + init_pair(CP_WHITE, 7, trans); + init_pair(CP_BLUE, 4, trans); + init_pair(CP_RED, 1, trans); + init_pair(CP_YELLOW, 3, trans); + } + + colors = 1; + } + + // set background color of main window + if(colors) + wbkgd(stdscr, COLOR_PAIR(CP_YELLOW)); + + // setup header + if(bar_top) { + //TODO move cursor to calculated indentation + wmove(stdscr, 0, 1); + //TODO add text to header + wprintw(stdscr, "header"); + } + + // setup footer + if(bar_bottom) { + //TODO move cursor to calculated indentation + wmove(stdscr, LINES - 1, 1); + //TODO add text to footer + wprintw(stdscr, "footer"); + } + + // setup main window + WINDOW *content = newwin(LINES - bar_top - bar_bottom, COLS, 0, 0 + bar_top); + if(colors) + wbkgd(content, COLOR_PAIR(CP_WHITE)); + + slide = deck->slide; + while(slide) { + // fade out + // print header / footer + // print lines + // fade in + + // wait for user input + c = getch(); + + // evaluate user input + switch(c) { + + // show previous slide + case KEY_UP: + case KEY_LEFT: + case KEY_BACKSPACE: + case 'h': + case 'k': + if(slide->prev) + slide = slide->prev; + break; + + // show next slide + case KEY_DOWN: + case KEY_RIGHT: + case KEY_ENTER: + case 'j': + case 'l': + if(slide->next) + slide = slide->next; + break; + + // quit + case 'q': + slide = (void*)0; + break; + } + } + + endwin(); + + return(0); +} + -- 2.20.1