*
*/
-#include <locale.h> // setlocale
-#include <stdlib.h>
-#include <string.h> // strchr
-#include <unistd.h>
-
+#include <ctype.h> // isalnum
+#include <wchar.h> // wcschr
+#include <wctype.h> // iswalnum
+#include <string.h> // strcpy
+#include <unistd.h> // usleep
#include "viewer.h"
// color ramp for fading from black to color
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 ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reload, int noreload) {
int c = 0; // char
int i = 0; // iterate
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
// header line 1 is displayed at the top
int bar_top = (deck->headers > 0) ? 1 : 0;
slide_t *slide = deck->slide;
line_t *line;
- // set locale to display UTF-8 correctly in ncurses
- setlocale(LC_CTYPE, "");
-
// init ncurses
initscr();
lc = 0;
line = slide->line;
- while(line) {
+ while(line && line->text) {
+
+ if (line->text->value)
+ lc += url_count_inline(line->text->value);
+
+ if (line->text->value)
+ line->length -= url_len_inline(line->text->value);
+
if(line->length > COLS) {
i = line->length;
offset = 0;
endwin();
// print error
- fprintf(stderr, "Error: Terminal width (%i columns) too small. Need at least %i columns.\n", COLS, i);
- fprintf(stderr, "You may need to shorten some lines by inserting line breaks.\n");
+ fwprintf(stderr, L"Error: Terminal width (%i columns) too small. Need at least %i columns.\n", COLS, i);
+ fwprintf(stderr, L"You may need to shorten some lines by inserting line breaks.\n");
- return(1);
+ // no reload
+ return 0;
}
// set max_cols
- max_cols = (i > max_cols) ? i : max_cols;
+ max_cols = MAX(i, max_cols);
// iterate to next line
offset = prev_blank(line->text, offset + COLS);
lc++;
}
// set max_cols one last time
- max_cols = (i > max_cols) ? i : max_cols;
+ max_cols = MAX(i, max_cols);
} else {
// set max_cols
- max_cols = (line->length > max_cols) ? line->length : max_cols;
+ max_cols = MAX(line->length, max_cols);
}
lc++;
line = line->next;
}
- max_lines = (lc > max_lines) ? lc : max_lines;
+ max_lines = MAX(lc, max_lines);
slide = slide->next;
}
endwin();
// print error
- fprintf(stderr, "Error: Terminal heigth (%i lines) too small. Need at least %i lines.\n", LINES, max_lines + bar_top + bar_bottom);
- fprintf(stderr, "You may need to add additional horizontal rules ('***') to split your file in shorter slides.\n");
+ 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"You may need to add additional horizontal rules (---) to split your file in shorter slides.\n");
- return(1);
+ // no reload
+ return 0;
}
// disable cursor
init_pair(CP_YELLOW, 208, trans);
// enable color fading
- if(!nofade) fade = 1;
+ if(!nofade)
+ fade = true;
// 8 color mode
} else {
wbkgd(content, COLOR_PAIR(CP_WHITE));
slide = deck->slide;
+
+ // find slide to reload
+ while(reload > 1 && reload <= deck->slides) {
+ slide = slide->next;
+ sc++;
+ reload--;
+ }
+
+ // reset reload indicator
+ reload = 0;
+
while(slide) {
+
+ url_init();
+
// clear windows
werase(content);
werase(stdscr);
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]);
+ mvwaddwstr(stdscr,
+ 0, (COLS - line->length + offset) / 2,
+ &line->text->value[offset]);
}
// setup 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]);
+ mvwaddwstr(stdscr,
+ LINES - 1, 3,
+ &line->text->value[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(content);
wrefresh(stdscr);
line = slide->line;
- l = 0;
+ l = stop = 0;
// print lines
while(line) {
add_line(content, l, (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))
+ stop++;
+
+ l += (line->length / COLS) + 1;
line = line->next;
- l++;
+
+ // only stop here if we didn't stop here recently
+ if(stop > slide->stop)
+ break;
+ }
+
+ // print pandoc URL references
+ // only if we already printed all lines of the current slide
+ if(!line) {
+ int i, ymax;
+ getmaxyx( content, ymax, i );
+ for (i = 0; i < url_get_amount(); i++) {
+ mvwprintw(content, ymax - url_get_amount() - 1 + i, 3,
+ "[%d] ", i);
+ waddwstr(content, url_get_target(i));
+ }
}
// make content visible
fade_in(content, trans, colors, invert);
// re-enable fading after any undefined key press
- if(COLORS == 256 && !nofade) fade = 1;
+ if(COLORS == 256 && !nofade)
+ fade = true;
// wait for user input
c = getch();
i = 0;
switch(c) {
- // show previous slide
+ // 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(slide->prev) {
- slide = slide->prev;
- sc--;
+ if(stop > 1 || (stop == 1 && !line)) {
+ // show current slide again
+ // but stop one stop bit earlier
+ slide->stop--;
} else {
- fade = 0;
+ if(slide->prev) {
+ // show previous slide
+ slide = slide->prev;
+ sc--;
+ } else {
+ // do nothing
+ fade = false;
+ }
}
break;
- // show next slide
+ // 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(slide->next) {
- slide = slide->next;
- sc++;
+ if(stop && line) {
+ // show current slide again
+ // but stop one stop bit later (or at end of slide)
+ slide->stop++;
} else {
- fade = 0;
+ if(slide->next) {
+ // show next slide
+ slide = slide->next;
+ sc++;
+ } else {
+ // do nothing
+ fade = false;
+ }
}
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) {
+ 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) {
}
} else {
// disable fading if slide n doesn't exist
- fade = 0;
+ fade = false;
}
break;
// show first slide
+ case 'g':
case KEY_HOME:
slide = deck->slide;
sc = 1;
break;
// show last slide
+ case 'G':
case KEY_END:
for(i = sc; i <= deck->slides; i++) {
if(slide->next) {
}
break;
+ // 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 = 0;
- slide = (void*)0;
+ fade = false;
+ // do not reload
+ reload = 0;
+ slide = NULL;
break;
default:
// disable fading on undefined key press
- fade = 0;
+ fade = false;
break;
}
// fade out
if(fade)
fade_out(content, trans, colors, invert);
+
+ url_purge();
}
+ // disable ncurses
endwin();
- return(0);
+ // free ncurses memory
+ delwin(content);
+ if(reload == 0)
+ delwin(stdscr);
+
+ // return reload indicator (0 means no reload)
+ return reload;
}
void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colors) {
+
+ if(!line->text->value) {
+ return;
+ }
+
int i; // increment
+ int offset = 0; // text offset
+
+ // move the cursor in position
+ wmove(window, y, x);
+
+ // IS_UNORDERED_LIST_3
+ if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_3)) {
+ offset = next_nonblank(line->text, 0);
+ char prompt[13];
+ strcpy(&prompt[0], CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)? " | " : " ");
+ strcpy(&prompt[4], CHECK_BIT(line->bits, IS_UNORDERED_LIST_2)? " | " : " ");
+
+ if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_EXT)) {
+ strcpy(&prompt[8], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_3)? " | " : " ");
+ } else {
+ strcpy(&prompt[8], " +- ");
+ offset += 2;
+ }
+
+ wprintw(window,
+ "%s", prompt);
+
+ if(!CHECK_BIT(line->bits, IS_CODE))
+ inline_display(window, &line->text->value[offset], colors);
+
+ // IS_UNORDERED_LIST_2
+ } else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_2)) {
+ offset = next_nonblank(line->text, 0);
+ char prompt[9];
+ strcpy(&prompt[0], CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)? " | " : " ");
+
+ if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_EXT)) {
+ strcpy(&prompt[4], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_2)? " | " : " ");
+ } else {
+ strcpy(&prompt[4], " +- ");
+ offset += 2;
+ }
+
+ wprintw(window,
+ "%s", prompt);
+
+ if(!CHECK_BIT(line->bits, IS_CODE))
+ inline_display(window, &line->text->value[offset], colors);
+
+ // IS_UNORDERED_LIST_1
+ } else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)) {
+ offset = next_nonblank(line->text, 0);
+ char prompt[5];
+
+ if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_EXT)) {
+ strcpy(&prompt[0], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_1)? " | " : " ");
+ } else {
+ strcpy(&prompt[0], " +- ");
+ offset += 2;
+ }
+
+ wprintw(window,
+ "%s", prompt);
+
+ if(!CHECK_BIT(line->bits, IS_CODE))
+ inline_display(window, &line->text->value[offset], colors);
+ }
+
+ // IS_CODE
+ if(CHECK_BIT(line->bits, IS_CODE)) {
+
+ // set static offset for code
+ offset = CODE_INDENT;
+
+ // reverse color for code blocks
+ if(colors)
+ wattron(window, COLOR_PAIR(CP_BLACK));
+
+ // print whole lines
+ waddwstr(window, &line->text->value[offset]);
+ }
- if(line->text->text) {
- int offset = 0; // text offset
-
- // IS_UNORDERED_LIST_3
- if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_3)) {
- offset = next_nonblank(line->text, 0);
- char format_s[15];
- strcpy(&format_s[0], CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)? " | " : " ");
- strcpy(&format_s[4], CHECK_BIT(line->bits, IS_UNORDERED_LIST_2)? " | " : " ");
- strcpy(&format_s[8], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_3)? " +- %s" : " `- %s");
- mvwprintw(window,
- y, x,
- format_s,
- &line->text->text[offset + 2]);
-
- // IS_UNORDERED_LIST_2
- } else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_2)) {
- offset = next_nonblank(line->text, 0);
- char format_s[11];
- strcpy(&format_s[0], CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)? " | " : " ");
- strcpy(&format_s[4], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_2)? " +- %s" : " `- %s");
- mvwprintw(window,
- y, x,
- format_s,
- &line->text->text[offset + 2]);
-
- // IS_UNORDERED_LIST_1
- } else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)) {
- offset = next_nonblank(line->text, 0);
- char format_s[7];
- strcpy(&format_s[0], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_1)? " +- %s" : " `- %s");
- mvwprintw(window,
- y, x,
- format_s,
- &line->text->text[offset + 2]);
-
- // IS_CODE
- } else if(CHECK_BIT(line->bits, IS_CODE)) {
-
- // set static offset for code
- offset = CODE_INDENT;
-
- // reverse color for code blocks
- if(colors)
- wattron(window, COLOR_PAIR(CP_BLACK));
-
- // print whole lines
- mvwprintw(window,
- y, x,
- "%s", &line->text->text[offset]);
+ if(!CHECK_BIT(line->bits, IS_UNORDERED_LIST_1) &&
+ !CHECK_BIT(line->bits, IS_UNORDERED_LIST_2) &&
+ !CHECK_BIT(line->bits, IS_UNORDERED_LIST_3) &&
+ !CHECK_BIT(line->bits, IS_CODE)) {
+
+ // IS_QUOTE
+ if(CHECK_BIT(line->bits, IS_QUOTE)) {
+ while(line->text->value[offset] == '>') {
+ // print a reverse color block
+ if(colors) {
+ wattron(window, COLOR_PAIR(CP_BLACK));
+ wprintw(window, "%s", " ");
+ wattron(window, COLOR_PAIR(CP_WHITE));
+ wprintw(window, "%s", " ");
+ } else {
+ wprintw(window, "%s", ">");
+ }
+ // find next quote or break
+ offset++;
+ if(line->text->value[offset] == ' ')
+ offset = next_word(line->text, offset);
+ }
+
+ inline_display(window, &line->text->value[offset], colors);
} else {
+ // IS_CENTER
+ if(CHECK_BIT(line->bits, IS_CENTER)) {
+ if(line->length < max_cols) {
+ wmove(window, y, x + ((max_cols - line->length) / 2));
+ }
+ }
+
// IS_H1 || IS_H2
if(CHECK_BIT(line->bits, IS_H1) || CHECK_BIT(line->bits, IS_H2)) {
wattron(window, A_UNDERLINE);
// skip hashes
- while(line->text->text[offset] == '#')
+ while(line->text->value[offset] == '#')
offset = next_word(line->text, offset);
// print whole lines
- mvwprintw(window,
- y, x,
- "%s", &line->text->text[offset]);
+ waddwstr(window, &line->text->value[offset]);
wattroff(window, A_UNDERLINE);
+ // no line-wide markdown
} 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
- if(colors) {
- wattron(window, COLOR_PAIR(CP_BLACK));
- wprintw(window, "%s", " ");
- wattron(window, COLOR_PAIR(CP_WHITE));
- wprintw(window, "%s", " ");
- } else {
- wprintw(window, "%s", ">");
- }
- // find next quote or break
- offset++;
- if(line->text->text[offset] == ' ')
- offset = next_word(line->text, offset);
- }
- }
-
- inline_display(window, &line->text->text[offset], colors);
+ inline_display(window, &line->text->value[offset], colors);
}
}
+ }
- // fill rest off line with spaces
+ // 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
+ 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));
- wattroff(window, A_UNDERLINE);
- }
+ // reset to default color
+ if(colors)
+ wattron(window, COLOR_PAIR(CP_WHITE));
+ wattroff(window, A_UNDERLINE);
}
-void inline_display(WINDOW *window, const char *c, const int colors) {
- const static char *special = "\\*_`"; // list of interpreted chars
+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;
+ int length_link_name, url_num;
cstack_t *stack = cstack_init();
+
// for each char in line
- while(*c) {
+ for(; *i; i++) {
// if char is in special char list
- if(strchr(special, *c)) {
+ if(wcschr(special, *i)) {
// closing special char (or second backslash)
- if((stack->top)(stack, *c)) {
+ // only if not followed by :alnum:
+ if((stack->top)(stack, *i) &&
+ (!iswalnum(i[1]) || *(i + 1) == L'\0' || *i == L'\\')) {
- switch(*c) {
+ switch(*i) {
// print escaped backslash
- case '\\':
- wprintw(window, "%c", *c);
+ case L'\\':
+ waddnwstr(window, i, 1);
break;
// disable highlight
- case '*':
+ case L'*':
if(colors)
wattron(window, COLOR_PAIR(CP_WHITE));
break;
// disable underline
- case '_':
+ case L'_':
wattroff(window, A_UNDERLINE);
break;
// disable inline code
- case '`':
+ case L'`':
if(colors)
wattron(window, COLOR_PAIR(CP_WHITE));
break;
(stack->pop)(stack);
// treat special as regular char
- } else if((stack->top)(stack, '\\')) {
- wprintw(window, "%c", *c);
+ } else if((stack->top)(stack, L'\\')) {
+ waddnwstr(window, i, 1);
// remove backslash from stack
(stack->pop)(stack);
// opening special char
} else {
- switch(*c) {
- // enable highlight
- case '*':
- if(colors)
- wattron(window, COLOR_PAIR(CP_RED));
- break;
- // enable underline
- case '_':
- wattron(window, A_UNDERLINE);
- break;
- // enable inline code
- case '`':
- if(colors)
- wattron(window, COLOR_PAIR(CP_BLACK));
- break;
- // do nothing for backslashes
- }
- // push special char to stack
- (stack->push)(stack, *c);
+ // emphasis or code span can start after new-line or space only
+ // and of cause after another emphasis markup
+ //TODO this condition looks ugly
+ if(i == c ||
+ iswspace(*(i - 1)) ||
+ ((iswspace(*(i - 1)) || *(i - 1) == L'*' || *(i - 1) == L'_') &&
+ ((i - 1) == c || iswspace(*(i - 2)))) ||
+ *i == L'\\') {
+
+ // url in pandoc style
+ if ((*i == L'[' && wcschr(i, L']')) ||
+ (*i == L'!' && *(i + 1) == L'[' && wcschr(i, L']'))) {
+
+ if (*i == L'!') i++;
+
+ if (wcschr(i, L']')[1] == L'(') {
+ i++;
+
+ // turn higlighting and underlining on
+ if (colors)
+ wattron(window, COLOR_PAIR(CP_BLUE));
+ wattron(window, A_UNDERLINE);
+
+ start_link_name = i;
+
+ // print the content of the label
+ // the label is printed as is
+ do {
+ waddnwstr(window, i, 1);
+ i++;
+ } while (*i != L']');
+
+ length_link_name = i - 1 - start_link_name;
+
+ i++;
+ i++;
+
+ start_url = i;
+
+ while (*i != L')') i++;
+
+ url_num = url_add(start_link_name, length_link_name, start_url, i - start_url, 0, 0);
+
+ wprintw(window, " [%d]", url_num);
+
+ // turn highlighting and underlining off
+ wattroff(window, A_UNDERLINE);
+ wattron(window, COLOR_PAIR(CP_WHITE));
+
+ } else {
+ wprintw(window, "[");
+ }
+
+ } else switch(*i) {
+ // enable highlight
+ case L'*':
+ if(colors)
+ wattron(window, COLOR_PAIR(CP_RED));
+ break;
+ // enable underline
+ case L'_':
+ wattron(window, A_UNDERLINE);
+ break;
+ // enable inline code
+ case L'`':
+ if(colors)
+ wattron(window, COLOR_PAIR(CP_BLACK));
+ break;
+ // do nothing for backslashes
+ }
+
+ // push special char to stack
+ (stack->push)(stack, *i);
+
+ } else {
+ waddnwstr(window, i, 1);
+ }
}
} else {
// remove backslash from stack
- if((stack->top)(stack, '\\'))
+ if((stack->top)(stack, L'\\'))
(stack->pop)(stack);
// print regular char
- wprintw(window, "%c", *c);
+ waddnwstr(window, i, 1);
}
-
- c++;
}
// pop stack until empty to prevent formated trailing spaces
while(!(stack->empty)(stack)) {
switch((stack->pop)(stack)) {
// disable highlight
- case '*':
+ case L'*':
if(colors)
wattron(window, COLOR_PAIR(CP_WHITE));
break;
// disable underline
- case '_':
+ case L'_':
wattroff(window, A_UNDERLINE);
break;
// disable inline code
- case '`':
+ case L'`':
if(colors)
wattron(window, COLOR_PAIR(CP_WHITE));
break;
}
return l;
}
+
+int get_slide_number(char init) {
+ int retval = init - '0';
+ char c;
+ // block for tenths of a second when using getch, ERR if no input
+ halfdelay(GOTO_SLIDE_DELAY);
+ while((c = getch()) != ERR) {
+ if (c < '0' || c > '9') {
+ retval = -1;
+ break;
+ }
+ retval = (retval * 10) + (c - '0');
+ }
+ nocbreak(); // cancel half delay mode
+ cbreak(); // go back to cbreak
+ return retval;
+}
