/*
* 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.
+ * using ncurses.
* Copyright (C) 2018 Michael Goehler
*
* This file is part of mdp.
#include "viewer.h"
#include "config.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 nocodebg) {
+int ncurses_display(deck_t *deck, int reload, int noreload, int slidenum) {
int c = 0; // char
int i = 0; // iterate
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_lines_slide = -1; // the slide that has the most lines
int max_cols = 0; // max columns per line
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 = FG_COLOR; // white in 8 color mode
- } else {
- trans = BG_COLOR; // black in 8 color mode
- }
- }
-
- if(invert) {
- init_pair(CP_WHITE, BG_COLOR, trans);
- init_pair(CP_BLACK, FG_COLOR, BG_COLOR);
- } else {
- init_pair(CP_WHITE, FG_COLOR, trans);
- init_pair(CP_BLACK, BG_COLOR, FG_COLOR);
- }
- init_pair(CP_BLUE, HEADER_COLOR, trans);
- init_pair(CP_RED, BOLD_COLOR, trans);
- init_pair(CP_YELLOW, TITLE_COLOR, 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;
// 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 + ((LINES - slide->lines_consumed - bar_top - bar_bottom) / 2),
- (COLS - max_cols) / 2, line, max_cols, colors, nocodebg);
+ (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))
// 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();
// show current slide again
// but stop one stop bit earlier
slide->stop--;
- fade = false;
} else {
if(slide->prev) {
// show previous slide
//stop on first bullet point always
if(slide->stop > 0)
slide->stop = 0;
- } else {
- // do nothing
- fade = false;
}
}
} else if (evaluate_binding(next_slide_binding, c)) {
// 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;
}
}
} else if (isdigit(c) && c != '0') {
// reload slide N
reload = sc;
slide = NULL;
- } else {
- // disable fading if reload is not possible
- fade = false;
}
} else if (evaluate_binding(quit_binding, c)) {
// quit
- // do not fade out on exit
- fade = false;
// do not reload
reload = 0;
slide = NULL;
- } else {
- // disable fading on undefined key press
- fade = false;
}
- // fade out
- if(fade)
- fade_out(content, trans, colors, invert);
-
url_purge();
}
}
}
-void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colors, int nocodebg) {
+void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colors) {
int i; // increment
int offset = 0; // text offset
// fill rest off line with spaces if we are in a code block
if(CHECK_BIT(line->bits, IS_CODE) && colors) {
- if(colors && !nocodebg)
- wattron(window, COLOR_PAIR(CP_BLACK));
+ wattron(window, COLOR_PAIR(CP_CODE));
for(i = getcurx(window) - x; i < max_cols; i++)
wprintw(window, "%s", " ");
}
"%s", prompt);
if(!CHECK_BIT(line->bits, IS_CODE))
- inline_display(window, &line->text->value[offset], colors, nocodebg);
+ inline_display(window, &line->text->value[offset], colors);
// IS_UNORDERED_LIST_2
} else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_2)) {
"%s", prompt);
if(!CHECK_BIT(line->bits, IS_CODE))
- inline_display(window, &line->text->value[offset], colors, nocodebg);
+ inline_display(window, &line->text->value[offset], colors);
// IS_UNORDERED_LIST_1
} else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)) {
"%s", prompt);
if(!CHECK_BIT(line->bits, IS_CODE))
- inline_display(window, &line->text->value[offset], colors, nocodebg);
+ inline_display(window, &line->text->value[offset], colors);
}
// IS_CODE
offset = CODE_INDENT;
}
- // reverse color for code blocks
- if(colors && !nocodebg)
- 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", ">");
offset = next_word(line->text, offset);
}
- inline_display(window, &line->text->value[offset], colors, nocodebg);
+ inline_display(window, &line->text->value[offset], colors);
} else {
// IS_CENTER
// 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))
// no line-wide markdown
} else {
- inline_display(window, &line->text->value[offset], colors, nocodebg);
+ inline_display(window, &line->text->value[offset], colors);
}
}
}
// 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);
}
-void inline_display(WINDOW *window, const wchar_t *c, const int colors, int nocodebg) {
+void inline_display(WINDOW *window, const wchar_t *c, const int colors) {
const static wchar_t *special = L"\\*_`!["; // list of interpreted chars
const wchar_t *i = c; // iterator
const wchar_t *start_link_name, *start_url;
// 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 && !nocodebg)
- 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) {