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Split out code block formatting and add light gray background behind code.

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Add support for hard breaks.

Add (preliminary) support for checkboxes.
This commit is contained in:
Michael R Sweet 2024-12-12 11:44:53 -05:00
parent 63cdb13b1b
commit b8b9d7ef8a
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GPG Key ID: BE67C75EC81F3244
1 changed files with 94 additions and 27 deletions
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121
examples/md2pdf.c
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@ -41,6 +41,7 @@ typedef enum doccolor_e // Document color enumeration
DOCCOLOR_RED, // #900
DOCCOLOR_GREEN, // #090
DOCCOLOR_BLUE, // #00C
DOCCOLOR_LTGRAY, // #EEE
DOCCOLOR_GRAY // #555
} doccolor_t;
@ -220,7 +221,7 @@ add_images(docdata_t *dd, // I - Document data
url = mmdGetURL(current);
ext = strrchr(url, '.');
fprintf(stderr, "IMAGE(%s), ext=\"%s\"\n", url, ext);
// fprintf(stderr, "IMAGE(%s), ext=\"%s\"\n", url, ext);
if (!access(url, 0) && ext && (!strcmp(ext, ".png") || !strcmp(ext, ".jpg") || !strcmp(ext, ".jpeg")))
{
@ -274,6 +275,10 @@ set_color(docdata_t *dd, // I - Document data
pdfioContentSetFillColorDeviceRGB(dd->st, 0.0, 0.0, 0.8);
pdfioContentSetStrokeColorDeviceRGB(dd->st, 0.0, 0.0, 0.8);
break;
case DOCCOLOR_LTGRAY :
pdfioContentSetFillColorDeviceGray(dd->st, 0.933);
pdfioContentSetStrokeColorDeviceGray(dd->st, 0.933);
break;
case DOCCOLOR_GRAY :
pdfioContentSetFillColorDeviceGray(dd->st, 0.333);
pdfioContentSetStrokeColorDeviceGray(dd->st, 0.333);
@ -301,6 +306,9 @@ set_font(docdata_t *dd, // I - Document data
pdfioContentSetTextFont(dd->st, docfont_names[font], fsize);
if (fabs(fsize - dd->fsize) >= 0.1)
pdfioContentSetTextLeading(dd->st, fsize * LINE_HEIGHT);
dd->font = font;
dd->fsize = fsize;
}
@ -431,14 +439,14 @@ render_line(docdata_t *dd, // I - Document data
dd->y -= lineheight;
}
fprintf(stderr, "num_frags=%u, y=%g\n", (unsigned)num_frags, dd->y);
// fprintf(stderr, "num_frags=%u, y=%g\n", (unsigned)num_frags, dd->y);
for (i = 0, frag = frags; i < num_frags; i ++, frag ++)
{
if (frag->text)
{
// Draw text
fprintf(stderr, " text=\"%s\", font=%d, color=%d, x=%g\n", frag->text, frag->font, frag->color, frag->x);
// fprintf(stderr, " text=\"%s\", font=%d, color=%d, x=%g\n", frag->text, frag->font, frag->color, frag->x);
set_color(dd, frag->color);
set_font(dd, frag->font, frag->height);
@ -461,7 +469,7 @@ render_line(docdata_t *dd, // I - Document data
// Draw image
char imagename[32]; // Current image name
fprintf(stderr, " imagenum=%u, x=%g, width=%g, height=%g\n", (unsigned)frag->imagenum, frag->x, frag->width, frag->height);
// fprintf(stderr, " imagenum=%u, x=%g, width=%g, height=%g\n", (unsigned)frag->imagenum, frag->x, frag->width, frag->height);
if (in_text)
{
@ -552,6 +560,9 @@ format_block(docdata_t *dd, // I - Document data
wswidth = 0.0;
next = mmd_walk_next(block, current);
if (type == MMD_TYPE_CHECKBOX)
text = text ? "[x]" : "[ ]";
// Process the node...
if (type == MMD_TYPE_IMAGE && url)
{
@ -589,6 +600,18 @@ format_block(docdata_t *dd, // I - Document data
width = height * pdfioImageGetWidth(image) / pdfioImageGetHeight(image);
}
}
else if (type == MMD_TYPE_HARD_BREAK && num_frags > 0)
{
render_line(dd, margin_top, lineheight, num_frags, frags);
num_frags = 0;
frag = frags;
x = left;
lineheight = 0.0;
margin_top = 0.0;
continue;
}
else if (!text)
{
continue;
@ -634,7 +657,10 @@ format_block(docdata_t *dd, // I - Document data
// Add the current node to the fragment list
if (num_frags == 0)
{
ws = false;
wswidth = 0.0;
}
frag->x = x;
frag->width = width + wswidth;
@ -657,6 +683,69 @@ format_block(docdata_t *dd, // I - Document data
}
//
// 'format_code()' - Format a code block...
//
static void
format_code(docdata_t *dd, // I - Document data
mmd_t *block, // I - Code block
double left, // I - Left margin
double right) // I - Right margin
{
mmd_t *code; // Current code block
double lineheight; // Line height
// Start a new page as needed...
if (!dd->st)
new_page(dd);
lineheight = SIZE_CODEBLOCK * LINE_HEIGHT;
dd->y -= 2.0 * lineheight;
if (dd->y < dd->art_box.y1)
{
new_page(dd);
dd->y -= lineheight;
}
// Start a code text block...
set_font(dd, DOCFONT_MONOSPACE, SIZE_CODEBLOCK);
pdfioContentTextBegin(dd->st);
pdfioContentTextMoveTo(dd->st, left, dd->y);
for (code = mmdGetFirstChild(block); code; code = mmdGetNextSibling(code))
{
set_color(dd, DOCCOLOR_LTGRAY);
pdfioContentPathRect(dd->st, left - 3.0, dd->y - (LINE_HEIGHT - 1.0) * SIZE_CODEBLOCK, right - left + 3.0, lineheight);
pdfioContentFillAndStroke(dd->st, false);
set_color(dd, DOCCOLOR_RED);
pdfioContentTextShow(dd->st, UNICODE_VALUE, mmdGetText(code));
dd->y -= lineheight;
if (dd->y < dd->art_box.y1)
{
// End the current text block...
pdfioContentTextEnd(dd->st);
// Start a new page...
new_page(dd);
set_font(dd, DOCFONT_MONOSPACE, SIZE_CODEBLOCK);
dd->y -= lineheight;
pdfioContentTextBegin(dd->st);
pdfioContentTextMoveTo(dd->st, left, dd->y);
}
}
// End the current text block...
pdfioContentTextEnd(dd->st);
}
//
// 'format_doc()' - Format a document.
//
@ -732,29 +821,7 @@ format_doc(docdata_t *dd, // I - Document data
break;
case MMD_TYPE_CODE_BLOCK :
{
mmd_t *code; // Current code block
linefrag_t frag; // Line fragment
double margin_top; // Top margin
frag.x = left + 36.0;
frag.width = 0.0;
frag.height = SIZE_CODEBLOCK;
frag.imagenum = 0;
frag.ws = false;
frag.font = DOCFONT_MONOSPACE;
frag.color = DOCCOLOR_RED;
margin_top = SIZE_CODEBLOCK * LINE_HEIGHT;
for (code = mmdGetFirstChild(current); code; code = mmdGetNextSibling(code))
{
frag.text = mmdGetText(code);
render_line(dd, margin_top, SIZE_CODEBLOCK * LINE_HEIGHT, 1, &frag);
margin_top = 0.0;
}
}
format_code(dd, current, left + 36.0, right - 36.0);
break;
}
}