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Add support for remote URL links.

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Michael R Sweet 2024-12-14 19:56:45 -05:00
parent 2d175fdf70
commit 4baafde74b
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2 changed files with 90 additions and 7 deletions
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89
examples/md2pdf.c
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@ -86,7 +86,8 @@ typedef struct docdata_s // Document formatting data
docfont_t font; // Current font
double fsize; // Current font size
doccolor_t color; // Current color
pdfio_obj_t *annots; // Annotations object (for links)
pdfio_array_t *annots_array; // Annotations array (for links)
pdfio_obj_t *annots_obj; // Annotations object (for links)
size_t num_links; // Number of links for this page
doclink_t links[DOCLINK_MAX]; // Links for this page
} docdata_t;
@ -99,6 +100,7 @@ typedef struct linefrag_s // Line fragment
height; // Height of item
size_t imagenum; // Image number
const char *text; // Text string
const char *url; // Link URL string
bool ws; // Whitespace before text?
docfont_t font; // Text font
doccolor_t color; // Text color
@ -203,6 +205,7 @@ static const char * const docfont_names[] =
//
static void add_images(docdata_t *dd, mmd_t *doc);
static void add_links(docdata_t *dd);
static pdfio_obj_t *find_image(docdata_t *dd, const char *url, size_t *imagenum);
static void format_block(docdata_t *dd, mmd_t *block, docfont_t deffont, double fsize, double left, double right, const char *leader);
static void format_code(docdata_t *dd, mmd_t *block, double left, double right);
@ -303,7 +306,11 @@ main(int argc, // I - Number of command-line arguments
format_doc(&dd, doc, dd.art_box.x1, dd.art_box.x2);
// Close the PDF and return...
pdfioStreamClose(dd.st);
if (dd.st)
{
pdfioStreamClose(dd.st);
add_links(&dd);
}
pdfioFileClose(dd.pdf);
mmdFree(doc);
@ -394,6 +401,59 @@ find_image(docdata_t *dd, // I - Document data
}
//
// 'add_links()' - Add the page links, if any.
//
static void
add_links(docdata_t *dd) // I - Document data
{
size_t i; // Looping var
doclink_t *l; // Current link
pdfio_dict_t *dict; // Object dictionary
pdfio_obj_t *aobj, // Annotation object
*lobj; // Link object
pdfio_array_t *border; // Border values
// Add any links we have...
for (i = 0, l = dd->links; i < dd->num_links; i ++, l ++)
{
// Create the link action (remote URL)
dict = pdfioDictCreate(dd->pdf);
pdfioDictSetName(dict, "S", "URI");
pdfioDictSetString(dict, "URI", pdfioStringCreate(dd->pdf, l->url));
aobj = pdfioFileCreateObj(dd->pdf, dict);
pdfioObjClose(aobj);
// Create the annotation object pointing to the action...
dict = pdfioDictCreate(dd->pdf);
pdfioDictSetName(dict, "Subtype", "Link");
pdfioDictSetRect(dict, "Rect", &l->box);
border = pdfioArrayCreate(dd->pdf);
pdfioArrayAppendNumber(border, 0.0);
pdfioArrayAppendNumber(border, 0.0);
pdfioArrayAppendNumber(border, 0.0);
pdfioDictSetArray(dict, "Border", border);
pdfioDictSetObj(dict, "A", aobj);
lobj = pdfioFileCreateObj(dd->pdf, dict);
pdfioObjClose(lobj);
pdfioArrayAppendObj(dd->annots_array, lobj);
}
// Close the Annots array object...
pdfioObjClose(dd->annots_obj);
// Reset links...
dd->annots_array = NULL;
dd->annots_obj = NULL;
dd->num_links = 0;
}
//
// 'format_block()' - Format a block of text
//
@ -584,6 +644,7 @@ format_block(docdata_t *dd, // I - Document data
frag->height = text ? fsize : height;
frag->imagenum = imagenum;
frag->text = text;
frag->url = url;
frag->ws = ws;
frag->font = font;
frag->color = color;
@ -1076,15 +1137,23 @@ new_page(docdata_t *dd) // I - Document data
// Close the current page...
pdfioStreamClose(dd->st);
if (dd->st)
{
pdfioStreamClose(dd->st);
add_links(dd);
}
// Prep the new page...
page_dict = pdfioDictCreate(dd->pdf);
dd->annots_array = pdfioArrayCreate(dd->pdf);
dd->annots_obj = pdfioFileCreateArrayObj(dd->pdf, dd->annots_array);
pdfioDictSetRect(page_dict, "MediaBox", &dd->media_box);
// pdfioDictSetRect(page_dict, "CropBox", &dd->crop_box);
pdfioDictSetRect(page_dict, "ArtBox", &dd->art_box);
pdfioDictSetObj(page_dict, "Annots", dd->annots_obj);
for (fontface = DOCFONT_REGULAR; fontface < DOCFONT_MAX; fontface ++)
pdfioPageDictAddFont(page_dict, docfont_names[fontface], dd->fonts[fontface]);
@ -1248,6 +1317,20 @@ render_line(docdata_t *dd, // I - Document data
pdfioContentTextShowf(dd->st, UNICODE_VALUE, " %s", frag->text);
else
pdfioContentTextShow(dd->st, UNICODE_VALUE, frag->text);
if (frag->type == MMD_TYPE_LINKED_TEXT && frag->url && dd->num_links < DOCLINK_MAX && (!strncmp(frag->url, "http://", 7) || !strncmp(frag->url, "https://", 8)))
{
doclink_t *l = dd->links + dd->num_links;
// Pointer to this link record
l->url = frag->url;
l->box.x1 = frag->x;
l->box.y1 = dd->y;
l->box.x2 = frag->x + frag->width;
l->box.y2 = dd->y + frag->height;
dd->num_links ++;
}
}
else
{

8
examples/md2pdf.md
View File

@ -19,9 +19,9 @@ Source Files
------------
The `md2pdf` program is organized into three source files: `md2pdf.c` which
contains the code to format the markdown content and `mmd.h` and `mmd.c` which
load the markdown content, which come from the [Miniature Markdown Library][MMD]
project which is provided under the terms of the Apache License v2.0.
![Apache License v2.0](apache-badge.png)
contains the code to format the markdown content and `mmd.h` and `mmd.c` (from
the [Miniature Markdown Library][MMD] project) which load the markdown content.
[MMD]: https://www.msweet.org/mmd/