/*
* Functions necessary to display a deck of slides in different color modes
- * using ncurses. Only white, red, and blue are supported, as they can be
- * faded in 256 color mode.
- * Copyright (C) 2016 Michael Goehler
+ * using ncurses.
+ * Copyright (C) 2018 Michael Goehler
*
* This file is part of mdp.
*
#include <unistd.h> // usleep
#include <stdlib.h> // getenv
#include "viewer.h"
-
-// color ramp for fading from black to color
-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, 33,
- 32, 39, 38, 45, 44, 44,
- 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 };
-
-// color ramp for fading from white to color
-static short white_ramp_invert[24] = { 15, 255, 254, 254, 252, 251,
- 250, 249, 248, 247, 246, 245,
- 243, 242, 241, 240, 239, 238,
- 237, 236, 235, 234, 233, 232};
-
-static short blue_ramp_invert[24] = { 15, 231, 231, 195, 195, 159,
- 159, 123, 123, 87, 51, 44,
- 45, 38, 39, 32, 33, 33,
- 26, 26, 27, 27, 21, 21};
-
-static short red_ramp_invert[24] = { 15, 231, 231, 224, 224, 225,
- 225, 218, 218, 219, 212, 213,
- 206, 207, 201, 200, 199, 199,
- 198, 198, 197, 197, 196, 196};
-
-int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reload, int noreload, int slidenum) {
-
- int c = 0; // char
- int i = 0; // iterate
- int l = 0; // line number
- int lc = 0; // line count
- int sc = 1; // slide count
- 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
- int stop = 0; // passed stop bits per slide
+#include "config.h"
+
+int ncurses_display(deck_t *deck, int reload, int noreload, int slidenum) {
+
+ int c = 0; // char
+ int i = 0; // iterate
+ int l = 0; // line number
+ int lc = 0; // line count
+ int sc = 1; // slide count
+ int colors = 0; // amount of colors supported
+ int max_lines = 0; // max lines per slide
+ int max_lines_slide = -1; // the slide that has the most lines
+ int max_cols = 0; // max columns per line
+ int offset; // text offset
+ int stop = 0; // passed stop bits per slide
// header line 1 is displayed at the top
int bar_top = (deck->headers > 0) ? 1 : 0;
}
max_lines = MAX(lc, max_lines);
+ if (lc == max_lines) {
+ max_lines_slide = sc;
+ }
+ slide->lines_consumed = lc;
slide = slide->next;
+ ++sc;
}
// not enough lines
endwin();
// print error
- fwprintf(stderr, L"Error: Terminal height (%i lines) too small. Need at least %i lines.\n", LINES, max_lines + bar_top + bar_bottom);
+ fwprintf(stderr, L"Error: Terminal height (%i lines) too small. Need at least %i lines for slide #%i.\n", LINES, max_lines + bar_top + bar_bottom, max_lines_slide);
fwprintf(stderr, L"You may need to add additional horizontal rules (---) to split your file in shorter slides.\n");
// no reload
start_color();
use_default_colors();
- // 256 color mode
- if(COLORS == 256) {
-
- if(notrans) {
- if(invert) {
- trans = 15; // white in 256 color mode
- } else {
- trans = 16; // black in 256 color mode
- }
- }
-
- if(invert) {
- init_pair(CP_WHITE, 232, trans);
- init_pair(CP_BLUE, 21, trans);
- init_pair(CP_RED, 196, trans);
- init_pair(CP_BLACK, 15, 232);
- } else {
- init_pair(CP_WHITE, 255, trans);
- init_pair(CP_BLUE, 123, trans);
- init_pair(CP_RED, 213, trans);
- init_pair(CP_BLACK, 16, 255);
- }
- init_pair(CP_YELLOW, 208, trans);
-
- // enable color fading
- if(!nofade)
- fade = true;
-
- // 8 color mode
- } else {
-
- if(notrans) {
- if(invert) {
- trans = 7; // white in 8 color mode
- } else {
- trans = 0; // black in 8 color mode
- }
- }
-
- if(invert) {
- init_pair(CP_WHITE, 0, trans);
- init_pair(CP_BLACK, 7, 0);
- } else {
- init_pair(CP_WHITE, 7, trans);
- init_pair(CP_BLACK, 0, 7);
- }
- init_pair(CP_BLUE, 4, trans);
- init_pair(CP_RED, 1, trans);
- init_pair(CP_YELLOW, 3, trans);
- }
+ init_pair(CP_FG, FG_COLOR, BG_COLOR);
+ init_pair(CP_HEADER, HEADER_COLOR, BG_COLOR);
+ init_pair(CP_BOLD, BOLD_COLOR, BG_COLOR);
+ init_pair(CP_TITLE, TITLE_COLOR, BG_COLOR);
+ init_pair(CP_CODE, CODEFG_COLOR, CODEBG_COLOR);
colors = 1;
}
// set background color for main window
if(colors)
- wbkgd(stdscr, COLOR_PAIR(CP_WHITE));
+ wbkgd(stdscr, COLOR_PAIR(CP_FG));
// setup content window
WINDOW *content = newwin(LINES - bar_top - bar_bottom, COLS, 0 + bar_top, 0);
// set background color of content window
if(colors)
- wbkgd(content, COLOR_PAIR(CP_WHITE));
+ wbkgd(content, COLOR_PAIR(CP_FG));
slide = deck->slide;
// find slide to reload
+ sc = 1;
while(reload > 1 && reload <= deck->slides) {
slide = slide->next;
sc++;
// set main window text color
if(colors)
- wattron(stdscr, COLOR_PAIR(CP_YELLOW));
+ wattron(stdscr, COLOR_PAIR(CP_TITLE));
// setup header
if(bar_top) {
// print lines
while(line) {
- add_line(content, l, (COLS - max_cols) / 2, line, max_cols, colors);
+ add_line(content, l + ((LINES - slide->lines_consumed - bar_top - bar_bottom) / 2),
+ (COLS - max_cols) / 2, line, max_cols, colors);
// raise stop counter if we pass a line having a stop bit
if(CHECK_BIT(line->bits, IS_STOP))
}
// print pandoc URL references
- // only if we already printed all lines of the current slide
- if(!line) {
+ // only if we already printed all lines of the current slide (or output is stopped)
+ if(!line ||
+ stop > slide->stop) {
int i, ymax;
getmaxyx( content, ymax, i );
for (i = 0; i < url_get_amount(); i++) {
// compare virtual screen to physical screen and does the actual updates
doupdate();
- // fade in
- if(fade)
- fade_in(content, trans, colors, invert);
-
- // re-enable fading after any undefined key press
- if(COLORS == 256 && !nofade)
- fade = true;
-
// wait for user input
c = getch();
// evaluate user input
i = 0;
- switch(c) {
+ if (evaluate_binding(prev_slide_binding, c)) {
// show previous slide or stop bit
- case KEY_UP:
- case KEY_LEFT:
- case KEY_PPAGE:
- case 8: // BACKSPACE (ascii)
- case 127: // BACKSPACE (xterm)
- case 263: // BACKSPACE (getty)
- case 'h':
- case 'k':
- if(stop > 1 || (stop == 1 && !line)) {
- // show current slide again
- // but stop one stop bit earlier
- slide->stop--;
- fade = false;
- } else {
- if(slide->prev) {
- // show previous slide
- slide = slide->prev;
- sc--;
- //stop on first bullet point always
- if(slide->stop > 0)
- slide->stop = 0;
- } else {
- // do nothing
- fade = false;
- }
+ if(stop > 1 || (stop == 1 && !line)) {
+ // show current slide again
+ // but stop one stop bit earlier
+ slide->stop--;
+ } else {
+ if(slide->prev) {
+ // show previous slide
+ slide = slide->prev;
+ sc--;
+ //stop on first bullet point always
+ if(slide->stop > 0)
+ slide->stop = 0;
}
- break;
-
+ }
+ } else if (evaluate_binding(next_slide_binding, c)) {
// show next slide or stop bit
- case KEY_DOWN:
- case KEY_RIGHT:
- case KEY_NPAGE:
- case '\n': // ENTER
- case ' ': // SPACE
- case 'j':
- case 'l':
- if(stop && line) {
- // show current slide again
- // but stop one stop bit later (or at end of slide)
- slide->stop++;
- fade = false;
- } else {
- if(slide->next) {
- // show next slide
- slide = slide->next;
- sc++;
- } else {
- // do nothing
- fade = false;
- }
+ if(stop && line) {
+ // show current slide again
+ // but stop one stop bit later (or at end of slide)
+ slide->stop++;
+ } else {
+ if(slide->next) {
+ // show next slide
+ slide = slide->next;
+ sc++;
}
- break;
-
+ }
+ } else if (isdigit(c) && c != '0') {
// show slide n
- case '9':
- case '8':
- case '7':
- case '6':
- case '5':
- case '4':
- case '3':
- case '2':
- case '1':
- i = get_slide_number(c);
- if(i > 0 && i <= deck->slides) {
- while(sc != i) {
- // search forward
- if(sc < i) {
- if(slide->next) {
- slide = slide->next;
- sc++;
- }
- // search backward
- } else {
- if(slide->prev) {
- slide = slide->prev;
- sc--;
- }
+ i = get_slide_number(c);
+ if(i > 0 && i <= deck->slides) {
+ while(sc != i) {
+ // search forward
+ if(sc < i) {
+ if(slide->next) {
+ slide = slide->next;
+ sc++;
+ }
+ // search backward
+ } else {
+ if(slide->prev) {
+ slide = slide->prev;
+ sc--;
}
}
- } else {
- // disable fading if slide n doesn't exist
- fade = false;
}
- break;
-
+ }
+ } else if (evaluate_binding(first_slide_binding, c)) {
// show first slide
- case 'g':
- case KEY_HOME:
- slide = deck->slide;
- sc = 1;
- break;
-
+ slide = deck->slide;
+ sc = 1;
+ } else if (evaluate_binding(last_slide_binding, c)) {
// show last slide
- case 'G':
- case KEY_END:
- for(i = sc; i <= deck->slides; i++) {
- if(slide->next) {
- slide = slide->next;
- sc++;
- }
+ for(i = sc; i <= deck->slides; i++) {
+ if(slide->next) {
+ slide = slide->next;
+ sc++;
}
- break;
-
+ }
+ } else if (evaluate_binding(reload_binding, c)) {
// reload
- case 'r':
- if(noreload == 0) {
- // reload slide N
- reload = sc;
- slide = NULL;
- } else {
- // disable fading if reload is not possible
- fade = false;
- }
- break;
-
- // quit
- case 'q':
- // do not fade out on exit
- fade = false;
- // do not reload
- reload = 0;
+ if(noreload == 0) {
+ // reload slide N
+ reload = sc;
slide = NULL;
- break;
-
- default:
- // disable fading on undefined key press
- fade = false;
- break;
+ }
+ } else if (evaluate_binding(quit_binding, c)) {
+ // quit
+ // do not reload
+ reload = 0;
+ slide = NULL;
}
- // fade out
- if(fade)
- fade_out(content, trans, colors, invert);
-
url_purge();
}
return reload;
}
-static const char *list_open1 = " | ";
-static const char *list_open2 = " | ";
-static const char *list_open3 = " | ";
-static const char *list_head1 = " +- ";
-static const char *list_head2 = " +- ";
-static const char *list_head3 = " +- ";
-/*
-
-export MDP_LIST_OPEN3=" "
-export MDP_LIST_OPEN2=" "
-export MDP_LIST_OPEN3=" "
-export MDP_LIST_HEAD1=" ■ "
-export MDP_LIST_HEAD2=" ▫ "
-export MDP_LIST_HEAD3=" ● "
-
-export MDP_LIST_OPEN2=" │ "
-export MDP_LIST_OPEN2=" │ "
-export MDP_LIST_OPEN3=" │ "
-export MDP_LIST_HEAD1=" ▇─ "
-export MDP_LIST_HEAD2=" ▓─ "
-export MDP_LIST_HEAD3=" ▒─ "
-*
-*/
void setup_list_strings(void)
{
const char *str;
- if ((str = getenv("MDP_LIST_OPEN")) != NULL) {
+ /* utf8 can require 6 bytes */
+ if ((str = getenv("MDP_LIST_OPEN")) != NULL && strlen(str) <= 4*6) {
list_open1 = list_open2 = list_open3 = str;
} else {
- if ((str = getenv("MDP_LIST_OPEN1")) != NULL)
+ if ((str = getenv("MDP_LIST_OPEN1")) != NULL && strlen(str) <= 4*6)
list_open1 = str;
- if ((str = getenv("MDP_LIST_OPEN2")) != NULL)
+ if ((str = getenv("MDP_LIST_OPEN2")) != NULL && strlen(str) <= 4*6)
list_open2 = str;
- if ((str = getenv("MDP_LIST_OPEN3")) != NULL)
+ if ((str = getenv("MDP_LIST_OPEN3")) != NULL && strlen(str) <= 4*6)
list_open3 = str;
}
- if ((str = getenv("MDP_LIST_HEAD")) != NULL) {
+ if ((str = getenv("MDP_LIST_HEAD")) != NULL && strlen(str) <= 4*6) {
list_head1 = list_head2 = list_head3 = str;
} else {
- if ((str = getenv("MDP_LIST_HEAD1")) != NULL)
+ if ((str = getenv("MDP_LIST_HEAD1")) != NULL && strlen(str) <= 4*6)
list_head1 = str;
- if ((str = getenv("MDP_LIST_HEAD2")) != NULL)
+ if ((str = getenv("MDP_LIST_HEAD2")) != NULL && strlen(str) <= 4*6)
list_head2 = str;
- if ((str = getenv("MDP_LIST_HEAD3")) != NULL)
+ if ((str = getenv("MDP_LIST_HEAD3")) != NULL && strlen(str) <= 4*6)
list_head3 = str;
}
}
// fill rest off line with spaces if we are in a code block
if(CHECK_BIT(line->bits, IS_CODE) && colors) {
- if(colors)
- wattron(window, COLOR_PAIR(CP_BLACK));
+ wattron(window, COLOR_PAIR(CP_CODE));
for(i = getcurx(window) - x; i < max_cols; i++)
wprintw(window, "%s", " ");
}
// IS_CODE
if(CHECK_BIT(line->bits, IS_CODE)) {
- if (!CHECK_BIT(line->bits, IS_TILDE_CODE)) {
+ if (!CHECK_BIT(line->bits, IS_TILDE_CODE) &&
+ !CHECK_BIT(line->bits, IS_GFM_CODE)) {
// set static offset for code
offset = CODE_INDENT;
}
- // reverse color for code blocks
- if(colors)
- wattron(window, COLOR_PAIR(CP_BLACK));
+ // color for code block
+ if (colors)
+ wattron(window, COLOR_PAIR(CP_CODE));
// print whole lines
waddwstr(window, &line->text->value[offset]);
// IS_QUOTE
if(CHECK_BIT(line->bits, IS_QUOTE)) {
while(line->text->value[offset] == '>') {
- // print a reverse color block
+ // print a code block
if(colors) {
- wattron(window, COLOR_PAIR(CP_BLACK));
+ wattron(window, COLOR_PAIR(CP_CODE));
wprintw(window, "%s", " ");
- wattron(window, COLOR_PAIR(CP_WHITE));
+ wattron(window, COLOR_PAIR(CP_FG));
wprintw(window, "%s", " ");
} else {
wprintw(window, "%s", ">");
// set headline color
if(colors)
- wattron(window, COLOR_PAIR(CP_BLUE));
+ wattron(window, COLOR_PAIR(CP_HEADER));
// enable underline for H1
if(CHECK_BIT(line->bits, IS_H1))
}
// fill rest off line with spaces
- // we only need this if the color is inverted (e.g. code-blocks),
- // to ensure the background fades too
+ // we only need this if the color is inverted (e.g. code-blocks)
if(CHECK_BIT(line->bits, IS_CODE))
for(i = getcurx(window) - x; i < max_cols; i++)
wprintw(window, "%s", " ");
// reset to default color
if(colors)
- wattron(window, COLOR_PAIR(CP_WHITE));
+ wattron(window, COLOR_PAIR(CP_FG));
wattroff(window, A_UNDERLINE);
}
// disable highlight
case L'*':
if(colors)
- wattron(window, COLOR_PAIR(CP_WHITE));
+ wattron(window, COLOR_PAIR(CP_FG));
break;
// disable underline
case L'_':
// disable inline code
case L'`':
if(colors)
- wattron(window, COLOR_PAIR(CP_WHITE));
+ wattron(window, COLOR_PAIR(CP_FG));
break;
}
// turn higlighting and underlining on
if (colors)
- wattron(window, COLOR_PAIR(CP_BLUE));
+ wattron(window, COLOR_PAIR(CP_HEADER));
wattron(window, A_UNDERLINE);
start_link_name = i;
// turn highlighting and underlining off
wattroff(window, A_UNDERLINE);
- wattron(window, COLOR_PAIR(CP_WHITE));
+ wattron(window, COLOR_PAIR(CP_FG));
} else {
wprintw(window, "[");
// enable highlight
case L'*':
if(colors)
- wattron(window, COLOR_PAIR(CP_RED));
+ wattron(window, COLOR_PAIR(CP_BOLD));
break;
// enable underline
case L'_':
break;
// enable inline code
case L'`':
- if(colors)
- wattron(window, COLOR_PAIR(CP_BLACK));
+ wattron(window, COLOR_PAIR(CP_CODE));
break;
// do nothing for backslashes
}
// disable highlight
case L'*':
if(colors)
- wattron(window, COLOR_PAIR(CP_WHITE));
+ wattron(window, COLOR_PAIR(CP_FG));
break;
// disable underline
case L'_':
// disable inline code
case L'`':
if(colors)
- wattron(window, COLOR_PAIR(CP_WHITE));
+ wattron(window, COLOR_PAIR(CP_FG));
break;
// do nothing for backslashes
}
(stack->delete)(stack);
}
-void fade_out(WINDOW *window, int trans, int colors, int invert) {
- int i; // increment
- if(colors && COLORS == 256) {
- for(i = 22; i >= 0; i--) {
-
- // dim color pairs
- if(invert) {
- init_pair(CP_WHITE, white_ramp_invert[i], trans);
- init_pair(CP_BLUE, blue_ramp_invert[i], trans);
- init_pair(CP_RED, red_ramp_invert[i], trans);
- init_pair(CP_BLACK, 15, white_ramp_invert[i]);
- } else {
- init_pair(CP_WHITE, white_ramp[i], trans);
- init_pair(CP_BLUE, blue_ramp[i], trans);
- init_pair(CP_RED, red_ramp[i], trans);
- init_pair(CP_BLACK, 16, white_ramp[i]);
- }
-
- // refresh virtual screen with new color
- wnoutrefresh(window);
-
- // compare virtual screen to physical screen and does the actual updates
- doupdate();
-
- // delay for our eyes to recognize the change
- usleep(FADE_DELAY);
- }
- }
-}
-
-void fade_in(WINDOW *window, int trans, int colors, int invert) {
- int i; // increment
- if(colors && COLORS == 256) {
- for(i = 0; i <= 23; i++) {
-
- // brighten color pairs
- if(invert) {
- init_pair(CP_WHITE, white_ramp_invert[i], trans);
- init_pair(CP_BLUE, blue_ramp_invert[i], trans);
- init_pair(CP_RED, red_ramp_invert[i], trans);
- init_pair(CP_BLACK, 15, white_ramp_invert[i]);
- } else {
- init_pair(CP_WHITE, white_ramp[i], trans);
- init_pair(CP_BLUE, blue_ramp[i], trans);
- init_pair(CP_RED, red_ramp[i], trans);
- init_pair(CP_BLACK, 16, white_ramp[i]);
- }
-
- // refresh virtual screen with new color
- wnoutrefresh(window);
-
- // compare virtual screen to physical screen and does the actual updates
- doupdate();
-
- // delay for our eyes to recognize the change
- usleep(FADE_DELAY);
- }
- }
-}
-
int int_length (int val) {
int l = 1;
while(val > 9) {
int get_slide_number(char init) {
int retval = init - '0';
- char c;
+ int c;
// block for tenths of a second when using getch, ERR if no input
halfdelay(GOTO_SLIDE_DELAY);
while((c = getch()) != ERR) {
cbreak(); // go back to cbreak
return retval;
}
+
+bool evaluate_binding(const int bindings[], char c) {
+ int binding;
+ int ind = 0;
+ while((binding = bindings[ind]) != 0) {
+ if (c == binding) return true;
+ ind++;
+ }
+ return false;
+}
+
