+/*
+ * 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) 2014 Michael Goehler
+ *
+ * This file is part of mdp.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <locale.h> // setlocale
#include <ncurses.h>
#include <stdlib.h>
+#include <string.h> // strchr
#include <unistd.h>
-#include "include/parser.h"
#include "include/viewer.h"
static short white_ramp[24] = { 16, 232, 233, 234, 235, 236,
int ncurses_display(deck_t *deck, int notrans, int nofade) {
int c = 0; // char
+ int i = 0; // iterate
int l = 0; // line number
+ 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
// 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;
+ // header line 2 is displayed at the bottom
+ // anyway we display the slide number at the bottom
+ int bar_bottom = 1;
slide_t *slide = deck->slide;
line_t *line;
slide = slide->next;
}
+ // set locale to display UTF-8 correctly in ncurses
+ setlocale(LC_CTYPE, "");
+
// replace stdin with current tty if markdown input was piped
freopen("/dev/tty", "rw", stdin);
start_color();
use_default_colors();
- if(notrans) trans = 0; // 0 is black
+ if(notrans) trans = 0; // black in 8 color mode
if(COLORS == 256) {
+ if(notrans) trans = 16; // black in 256 color mode
+
// 256 color mode
init_pair(CP_WHITE, 255, trans);
init_pair(CP_BLUE, 123, trans);
if(colors)
wbkgd(stdscr, COLOR_PAIR(CP_YELLOW));
- // setup header
- if(bar_top) {
- 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) {
- 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 + bar_top, 0);
if(colors)
slide = deck->slide;
while(slide) {
- // clear main window
+ // clear windows
werase(content);
+ werase(stdscr);
+
+ // always resize window in case terminal geometry has changed
+ wresize(content, LINES - bar_top - bar_bottom, COLS);
+
+ // setup header
+ if(bar_top) {
+ 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(deck->headers > 1) {
+ 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]);
+ }
+ // add slide number to right footer
+ mvwprintw(stdscr,
+ LINES - 1, COLS - int_length(deck->slides) - int_length(sc) - 6,
+ "%d / %d", sc, deck->slides);
+
+ // make header + fooder visible
+ wrefresh(stdscr);
line = slide->line;
l = 0;
// print lines
while(line) {
- add_line(content, l, (COLS - max_cols) / 2, line);
+ add_line(content, l, (COLS - max_cols) / 2, line, max_cols);
line = line->next;
l++;
}
c = getch();
// evaluate user input
+ i = 0;
switch(c) {
// show previous slide
case 263: // BACKSPACE (getty)
case 'h':
case 'k':
- if(slide->prev)
+ if(slide->prev) {
slide = slide->prev;
+ sc--;
+ }
break;
// show next slide
case ' ': // SPACE
case 'j':
case 'l':
- if(slide->next)
+ if(slide->next) {
slide = slide->next;
+ sc++;
+ }
+ break;
+
+ // show slide n
+ case '9': i++;
+ case '8': i++;
+ case '7': i++;
+ case '6': i++;
+ case '5': i++;
+ case '4': i++;
+ case '3': i++;
+ case '2': i++;
+ case '1': i++;
+ if(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 = 0;
+ }
+ break;
+
+ // show first slide
+ case KEY_HOME:
+ slide = deck->slide;
+ sc = 1;
+ break;
+
+ // show last slide
+ case KEY_END:
+ for(i = sc; i <= deck->slides; i++) {
+ if(slide->next) {
+ slide = slide->next;
+ sc++;
+ }
+ }
break;
// quit
return(0);
}
-void add_line(WINDOW *window, int y, int x, line_t *line) {
+void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols) {
+ int i = 0; // increment
+ char *c; // char pointer for iteration
+ char *special = "\\*_"; // list of interpreted chars
+ cstack_t *stack = cstack_init();
+
if(line->text->text) {
int offset = 0; // text offset
- offset = next_nonblank(line->text, 0);
- // print line to window
- mvwprintw(window,
- y, x,
- "%s", &line->text->text[offset]);
+
+ // 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]);
+
+ } else {
+
+ // IS_H1 || IS_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 {
+ // move the cursor in position
+ wmove(window, y, x);
+
+ // IS_QUOTE
+ if(CHECK_BIT(line->bits, IS_QUOTE)) {
+ while(line->text->text[offset] == '>') {
+ // print a reverse color block
+ wattron(window, A_REVERSE);
+ wprintw(window, "%s", " ");
+ wattroff(window, A_REVERSE);
+ wprintw(window, "%s", " ");
+ // find next quote or break
+ offset++;
+ if(line->text->text[offset] == ' ')
+ offset = next_word(line->text, offset);
+ }
+ }
+
+ // for each char in line
+ c = &line->text->text[offset];
+ while(*c) {
+
+ // if char is in special char list
+ if(strchr(special, *c)) {
+
+ // closing special char (or second backslash)
+ if((stack->top)(stack, *c)) {
+
+ switch(*c) {
+ // print escaped backslash
+ case '\\':
+ wprintw(window, "%c", *c);
+ break;
+ // disable highlight
+ case '*':
+ wattron(window, COLOR_PAIR(CP_WHITE));
+ break;
+ // disable underline
+ case '_':
+ wattroff(window, A_UNDERLINE);
+ break;
+ }
+
+ // remove top special char from stack
+ (stack->pop)(stack);
+
+ // treat special as regular char
+ } else if((stack->top)(stack, '\\')) {
+ wprintw(window, "%c", *c);
+
+ // remove backslash from stack
+ (stack->pop)(stack);
+
+ // opening special char
+ } else {
+ switch(*c) {
+ // enable highlight
+ case '*':
+ wattron(window, COLOR_PAIR(CP_RED));
+ break;
+ // enable underline
+ case '_':
+ wattron(window, A_UNDERLINE);
+ break;
+ // do nothing for backslashes
+ }
+
+ // push special char to stack
+ (stack->push)(stack, *c);
+ }
+
+ } else {
+ // print regular char
+ wprintw(window, "%c", *c);
+ }
+
+ c++;
+ }
+
+ // pop stack until empty to prevent formated trailing spaces
+ while(!(stack->empty)(stack)) {
+ switch((stack->pop)(stack)) {
+ case '\\':
+ wprintw(window, "%c", '\\');
+ break;
+ // disable highlight
+ case '*':
+ wattron(window, COLOR_PAIR(CP_WHITE));
+ break;
+ // disable underline
+ case '_':
+ wattroff(window, A_UNDERLINE);
+ break;
+ }
+ }
+ }
+ }
+
+ // 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);
}
+
+ (stack->delete)(stack);
}
void fade_out(WINDOW *window, int trans, int colors) {
}
}
+int int_length (int val) {
+ int l = 1;
+ while(val > 9) {
+ l++;
+ val /= 10;
+ }
+ return l;
+}
