add multiline support
This commit is contained in:
Markus Teich
parent
d7eac23083
commit
22a0a7f255
@ -11,6 +11,8 @@ static char *fontfallbacks[] = {
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static const char *fgcol = "#000000";
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static const char *bgcol = "#FFFFFF";
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static const float linespacing = 1.4;
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/* how much screen estate is to be used at max for the content */
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static const float usablewidth = 0.75;
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static const float usableheight = 0.75;
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62
example
62
example
@ -1,14 +1,58 @@
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sent
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takahashi
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why?
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Origin:
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Takahashi
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Why?
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• PPTX sucks
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• LATEX sucks
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• PDF sucks
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also:
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terminal presentations
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don't support images…
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@nyan.png
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this text will not be displayed, since the @ at the start of the first line
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makes this paragraph an image slide.
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easy to use
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depends on Xlib, libpng
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depends on
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♽ Xlib
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☢ libpng
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~1000 lines of code
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how?
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sent FILENAME
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one slide per line
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usage:
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$ sent FILE1 [FILE2 …]
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▸ one slide per paragraph
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▸ lines starting with # are ignored
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▸ paragraphs starting with a @ line are png images
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▸ for an empty slide just use a \ as a paragraph
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# This is a comment and will not be part of the presentation
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# The next line starts with a whitespace, it will not produce an image slide
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@FILE.png
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thanks / questions?
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# multiple empty lines between paragraphs are also ignored
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# The following lines should produce
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# one empty slide
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\
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\
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\@this_line_actually_started_with_a_\.png
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\#This line as well
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⇒ Prepend a backslash to kill behaviour of special characters
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😀😁😂😃😄😅😆😇😈😉😊😋😌😍😎😏
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😐😑😒😓😔😕😖😗😘😙😚😛😜😝😞😟
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😠😡😢😣😥😦😧😨😩😪😫😭😮😯😰😱
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😲😳😴😵😶😷😸😹😺😻😼😽😾😿🙀☠
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thanks
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questions?
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133
sent.c
133
sent.c
@ -43,7 +43,8 @@ typedef struct {
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} Image;
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typedef struct {
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char *text;
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unsigned int linecount;
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char **lines;
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Image *img;
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} Slide;
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@ -85,7 +86,7 @@ static int pngprepare(Image *img);
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static void pngscale(Image *img);
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static void pngdraw(Image *img);
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static void getfontsize(char *str, unsigned int *width, unsigned int *height);
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static void getfontsize(Slide *s, unsigned int *width, unsigned int *height);
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static void cleanup();
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static void eprintf(const char *, ...);
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static void die(const char *, ...);
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@ -149,7 +150,7 @@ Image *pngopen(char *filename)
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return NULL;
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}
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if (!(img->info_ptr = png_create_info_struct(img->png_ptr))
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|| setjmp(png_jmpbuf(img->png_ptr))) {
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|| setjmp(png_jmpbuf(img->png_ptr))) {
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pngfree(img);
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return NULL;
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}
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@ -315,28 +316,38 @@ void pngdraw(Image *img)
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img->state |= DRAWN;
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}
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void getfontsize(char *str, unsigned int *width, unsigned int *height)
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void getfontsize(Slide *s, unsigned int *width, unsigned int *height)
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{
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size_t i;
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size_t i, j;
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unsigned int curw, imax;
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float lfac = linespacing * (s->linecount - 1) + 1;
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for (i = 0; i < NUMFONTSCALES; i++) {
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drw_setfontset(d, fonts[i]);
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*height = fonts[i]->h;
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*width = drw_fontset_getwidth(d, str);
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if (*width > xw.uw || *height > xw.uh)
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/* fit height */
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for (j = NUMFONTSCALES - 1; j >= 0; j--)
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if (fonts[j]->h * lfac <= xw.uh)
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break;
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drw_setfontset(d, fonts[j]);
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/* fit width */
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*width = 0;
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for (i = 0; i < s->linecount; i++) {
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curw = drw_fontset_getwidth(d, s->lines[i]);
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if (curw >= *width)
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imax = i;
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while (j >= 0 && curw > xw.uw) {
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drw_setfontset(d, fonts[--j]);
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curw = drw_fontset_getwidth(d, s->lines[i]);
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}
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if (imax == i)
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*width = curw;
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}
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if (i > 0) {
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drw_setfontset(d, fonts[i-1]);
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*height = fonts[i-1]->h;
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*width = drw_fontset_getwidth(d, str);
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}
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*width += d->fonts->h;
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*height = fonts[j]->h * lfac;
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*width += fonts[j]->h;
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}
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void cleanup()
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{
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unsigned int i;
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unsigned int i, j;
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for (i = 0; i < NUMFONTSCALES; i++)
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drw_fontset_free(fonts[i]);
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@ -348,8 +359,9 @@ void cleanup()
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XCloseDisplay(xw.dpy);
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if (slides) {
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for (i = 0; i < slidecount; i++) {
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if (slides[i].text)
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free(slides[i].text);
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for (j = 0; j < slides[i].linecount; j++)
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free(slides[i].lines[j]);
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free(slides[i].lines);
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if (slides[i].img)
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pngfree(slides[i].img);
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}
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@ -394,27 +406,57 @@ void eprintf(const char *fmt, ...)
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void load(FILE *fp)
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{
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static size_t size = 0;
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size_t blen, maxlines;
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char buf[BUFSIZ], *p;
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size_t i = slidecount;
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Slide *s;
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/* read each line from fp and add it to the item list */
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while (fgets(buf, sizeof(buf), fp)) {
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if ((i+1) * sizeof(*slides) >= size)
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while (1) {
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if ((slidecount+1) * sizeof(*slides) >= size)
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if (!(slides = realloc(slides, (size += BUFSIZ))))
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die("cannot realloc %u bytes:", size);
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if (*buf == '#')
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continue;
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if ((p = strchr(buf, '\n')))
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*p = '\0';
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if (!(slides[i].text = strdup(buf)))
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die("cannot strdup %u bytes:", strlen(buf)+1);
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if (slides[i].text[0] == '@')
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slides[i].img = pngopen(slides[i].text + 1);
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else
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slides[i].img = 0;
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i++;
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/* eat consecutive empty lines */
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while ((p = fgets(buf, sizeof(buf), fp)))
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if (strcmp(buf, "\n") != 0 && buf[0] != '#')
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break;
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if (!p)
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break;
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/* read one slide */
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maxlines = 0;
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memset((s = &slides[slidecount]), 0, sizeof(Slide));
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do {
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if (buf[0] == '#')
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continue;
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/* grow lines array */
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if (s->linecount >= maxlines) {
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maxlines = 2 * s->linecount + 1;
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if (!(s->lines = realloc(s->lines, maxlines * sizeof(s->lines[0]))))
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die("cannot realloc %u bytes:", maxlines * sizeof(s->lines[0]));
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}
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blen = strlen(buf);
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if (!(s->lines[s->linecount] = strdup(buf)))
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die("cannot strdup:");
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if (s->lines[s->linecount][blen-1] == '\n')
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s->lines[s->linecount][blen-1] = '\0';
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/* only make image slide if first line of a slide starts with @ */
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if (s->linecount == 0 && s->lines[0][0] == '@') {
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memmove(s->lines[0], &s->lines[0][1], blen);
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s->img = pngopen(s->lines[0]);
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}
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if (s->lines[s->linecount][0] == '\\')
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memmove(s->lines[s->linecount], &s->lines[s->linecount][1], blen);
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s->linecount++;
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} while ((p = fgets(buf, sizeof(buf), fp)) && strcmp(buf, "\n") != 0);
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slidecount++;
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if (!p)
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break;
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}
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slidecount = i;
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}
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void advance(const Arg *arg)
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@ -427,9 +469,9 @@ void advance(const Arg *arg)
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idx = new_idx;
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xdraw();
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if (slidecount > idx + 1 && slides[idx + 1].img && !pngread(slides[idx + 1].img))
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die("could not read image %s", slides[idx + 1].text + 1);
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die("could not read image %s", slides[idx + 1].lines[0]);
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if (0 < idx && slides[idx - 1].img && !pngread(slides[idx - 1].img))
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die("could not read image %s", slides[idx - 1].text + 1);
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die("could not read image %s", slides[idx - 1].lines[0]);
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}
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}
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@ -476,20 +518,27 @@ void usage()
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void xdraw()
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{
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unsigned int height, width;
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unsigned int height, width, i;
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Image *im = slides[idx].img;
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getfontsize(slides[idx].text, &width, &height);
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getfontsize(&slides[idx], &width, &height);
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XClearWindow(xw.dpy, xw.win);
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if (!im) {
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drw_rect(d, 0, 0, xw.w, xw.h, 1, 1);
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drw_text(d, (xw.w - width) / 2, (xw.h - height) / 2, width, height, slides[idx].text, 0);
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for (i = 0; i < slides[idx].linecount; i++)
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drw_text(d,
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(xw.w - width) / 2,
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(xw.h - height) / 2 + i * linespacing * d->fonts->h,
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width,
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d->fonts->h,
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slides[idx].lines[i],
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0);
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drw_map(d, xw.win, 0, 0, xw.w, xw.h);
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} else if (!(im->state & LOADED) && !pngread(im)) {
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eprintf("could not read image %s", slides[idx].text + 1);
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eprintf("could not read image %s", slides[idx].lines[0]);
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} else if (!(im->state & SCALED) && !pngprepare(im)) {
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eprintf("could not prepare image %s for drawing", slides[idx].text + 1);
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eprintf("could not prepare image %s for drawing", slides[idx].lines[0]);
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} else if (!(im->state & DRAWN)) {
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pngdraw(im);
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}
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@ -634,7 +683,7 @@ int main(int argc, char *argv[])
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}
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}
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if (!slides || !slides[0].text)
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if (!slides || !slides[0].lines)
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usage();
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xinit();
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