X-Git-Url: https://git.danieliu.xyz/?a=blobdiff_plain;f=src%2Fviewer.c;h=1a3ac008b1d502e560a7fbf09220e2390ac00df0;hb=3a525af596a8322c91c350ed4339cd1655c461b7;hp=d1588d03dd24b1a881838505238b789ba612581d;hpb=69352838d7b0be27074840a0d2d1e2cf294dcec3;p=smdp.git diff --git a/src/viewer.c b/src/viewer.c index d1588d0..1a3ac00 100644 --- a/src/viewer.c +++ b/src/viewer.c @@ -2,7 +2,7 @@ * 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) 2015 Michael Goehler + * Copyright (C) 2018 Michael Goehler * * This file is part of mdp. * @@ -26,6 +26,7 @@ #include // iswalnum #include // strcpy #include // usleep +#include // getenv #include "viewer.h" // color ramp for fading from black to color @@ -60,20 +61,33 @@ static short red_ramp_invert[24] = { 15, 231, 231, 224, 224, 225, 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 +// unordered list characters +// +// override via env vars: +// export MDP_LIST_OPEN1=" " MDP_LIST_OPEN2=" " MDP_LIST_OPEN3=" " +// export MDP_LIST_HEAD1=" ■ " MDP_LIST_HEAD2=" ● " MDP_LIST_HEAD3=" ▫ " +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 = " +- "; + +int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reload, int noreload, int slidenum, int nocodebg) { + + 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_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; @@ -93,11 +107,10 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa while(line && line->text) { - if (line->text->value) + 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; @@ -141,8 +154,13 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa } 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 @@ -152,7 +170,7 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa 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 @@ -230,18 +248,21 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa colors = 1; } - // set background color of main window + // set background color for main window if(colors) - wbkgd(stdscr, COLOR_PAIR(CP_YELLOW)); + wbkgd(stdscr, COLOR_PAIR(CP_WHITE)); - // setup main window + // 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)); slide = deck->slide; // find slide to reload + sc = 1; while(reload > 1 && reload <= deck->slides) { slide = slide->next; sc++; @@ -262,6 +283,10 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa // always resize window in case terminal geometry has changed wresize(content, LINES - bar_top - bar_bottom, COLS); + // set main window text color + if(colors) + wattron(stdscr, COLOR_PAIR(CP_YELLOW)); + // setup header if(bar_top) { line = deck->header; @@ -305,16 +330,16 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa break; } - // make header + fooder visible - wrefresh(content); - wrefresh(stdscr); + // copy changed lines in main window to virtual screen + wnoutrefresh(stdscr); line = slide->line; l = stop = 0; // 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, nocodebg); // raise stop counter if we pass a line having a stop bit if(CHECK_BIT(line->bits, IS_STOP)) @@ -329,8 +354,9 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa } // 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++) { @@ -340,8 +366,11 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa } } - // make content visible - wrefresh(content); + // copy changed lines in content window to virtual screen + wnoutrefresh(content); + + // compare virtual screen to physical screen and does the actual updates + doupdate(); // fade in if(fade) @@ -371,11 +400,15 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa // 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; @@ -395,6 +428,7 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa // 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 @@ -504,11 +538,34 @@ int ncurses_display(deck_t *deck, int notrans, int nofade, int invert, int reloa return reload; } -void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colors) { - - if(!line->text->value) { - return; +void setup_list_strings(void) +{ + const char *str; + + /* 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 && strlen(str) <= 4*6) + list_open1 = str; + if ((str = getenv("MDP_LIST_OPEN2")) != NULL && strlen(str) <= 4*6) + list_open2 = str; + if ((str = getenv("MDP_LIST_OPEN3")) != NULL && strlen(str) <= 4*6) + list_open3 = str; + } + 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 && strlen(str) <= 4*6) + list_head1 = str; + if ((str = getenv("MDP_LIST_HEAD2")) != NULL && strlen(str) <= 4*6) + list_head2 = str; + if ((str = getenv("MDP_LIST_HEAD3")) != NULL && strlen(str) <= 4*6) + list_head3 = str; } +} + +void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colors, int nocodebg) { int i; // increment int offset = 0; // text offset @@ -516,17 +573,37 @@ void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colo // move the cursor in position wmove(window, y, x); + if(!line->text->value) { + + // 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)); + for(i = getcurx(window) - x; i < max_cols; i++) + wprintw(window, "%s", " "); + } + + // do nothing + return; + } + // 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)? " | " : " "); + char prompt[13 * 6]; + int pos = 0, len, cnt; + len = sizeof(prompt) - pos; + cnt = snprintf(&prompt[pos], len, "%s", CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)? list_open1 : " "); + pos += (cnt > len - 1 ? len - 1 : cnt); + len = sizeof(prompt) - pos; + cnt = snprintf(&prompt[pos], len, "%s", CHECK_BIT(line->bits, IS_UNORDERED_LIST_2)? list_open2 : " "); + pos += (cnt > len - 1 ? len - 1 : cnt); + len = sizeof(prompt) - pos; if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_EXT)) { - strcpy(&prompt[8], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_3)? " | " : " "); + snprintf(&prompt[pos], len, "%s", line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_3)? list_open3 : " "); } else { - strcpy(&prompt[8], " +- "); + snprintf(&prompt[pos], len, "%s", list_head3); offset += 2; } @@ -534,18 +611,22 @@ void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colo "%s", prompt); if(!CHECK_BIT(line->bits, IS_CODE)) - inline_display(window, &line->text->value[offset], colors); + inline_display(window, &line->text->value[offset], colors, nocodebg); // 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)? " | " : " "); + char prompt[9 * 6]; + int pos = 0, len, cnt; + len = sizeof(prompt) - pos; + cnt = snprintf(&prompt[pos], len, "%s", CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)? list_open1 : " "); + pos += (cnt > len - 1 ? len - 1 : cnt); + len = sizeof(prompt) - pos; if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_EXT)) { - strcpy(&prompt[4], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_2)? " | " : " "); + snprintf(&prompt[pos], len, "%s", line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_2)? list_open2 : " "); } else { - strcpy(&prompt[4], " +- "); + snprintf(&prompt[pos], len, "%s", list_head2); offset += 2; } @@ -553,17 +634,17 @@ void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colo "%s", prompt); if(!CHECK_BIT(line->bits, IS_CODE)) - inline_display(window, &line->text->value[offset], colors); + inline_display(window, &line->text->value[offset], colors, nocodebg); // IS_UNORDERED_LIST_1 } else if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_1)) { offset = next_nonblank(line->text, 0); - char prompt[5]; + char prompt[5 * 6]; if(CHECK_BIT(line->bits, IS_UNORDERED_LIST_EXT)) { - strcpy(&prompt[0], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_1)? " | " : " "); + strcpy(&prompt[0], line->next && CHECK_BIT(line->next->bits, IS_UNORDERED_LIST_1)? list_open1 : " "); } else { - strcpy(&prompt[0], " +- "); + strcpy(&prompt[0], list_head1); offset += 2; } @@ -571,19 +652,20 @@ void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colo "%s", prompt); if(!CHECK_BIT(line->bits, IS_CODE)) - inline_display(window, &line->text->value[offset], colors); + inline_display(window, &line->text->value[offset], colors, nocodebg); } // 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) + if(colors && !nocodebg) wattron(window, COLOR_PAIR(CP_BLACK)); // print whole lines @@ -614,7 +696,7 @@ void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colo offset = next_word(line->text, offset); } - inline_display(window, &line->text->value[offset], colors); + inline_display(window, &line->text->value[offset], colors, nocodebg); } else { // IS_CENTER @@ -647,7 +729,7 @@ void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colo // no line-wide markdown } else { - inline_display(window, &line->text->value[offset], colors); + inline_display(window, &line->text->value[offset], colors, nocodebg); } } } @@ -665,7 +747,7 @@ void add_line(WINDOW *window, int y, int x, line_t *line, int max_cols, int colo wattroff(window, A_UNDERLINE); } -void inline_display(WINDOW *window, const wchar_t *c, const int colors) { +void inline_display(WINDOW *window, const wchar_t *c, const int colors, int nocodebg) { const static wchar_t *special = L"\\*_`!["; // list of interpreted chars const wchar_t *i = c; // iterator const wchar_t *start_link_name, *start_url; @@ -783,7 +865,7 @@ void inline_display(WINDOW *window, const wchar_t *c, const int colors) { break; // enable inline code case L'`': - if(colors) + if(colors && !nocodebg) wattron(window, COLOR_PAIR(CP_BLACK)); break; // do nothing for backslashes @@ -849,8 +931,11 @@ void fade_out(WINDOW *window, int trans, int colors, int invert) { init_pair(CP_BLACK, 16, white_ramp[i]); } - // refresh window with new color - wrefresh(window); + // 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); @@ -876,8 +961,11 @@ void fade_in(WINDOW *window, int trans, int colors, int invert) { init_pair(CP_BLACK, 16, white_ramp[i]); } - // refresh window with new color - wrefresh(window); + // 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); @@ -896,7 +984,7 @@ int int_length (int val) { 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) {