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#include "mupdf/html.h"
enum { T, R, B, L };
typedef struct html_document_s html_document;
typedef struct html_page_s html_page;
struct html_document_s
{
fz_document super;
fz_archive *zip;
fz_html_font_set *set;
float page_w, page_h, em;
float page_margin[4];
fz_html *html;
};
struct html_page_s
{
fz_page super;
html_document *doc;
int number;
};
static void
htdoc_drop_document(fz_context *ctx, fz_document *doc_)
{
html_document *doc = (html_document*)doc_;
fz_drop_archive(ctx, doc->zip);
fz_drop_html(ctx, doc->html);
fz_drop_html_font_set(ctx, doc->set);
}
static int
htdoc_resolve_link(fz_context *ctx, fz_document *doc_, const char *dest, float *xp, float *yp)
{
html_document *doc = (html_document*)doc_;
const char *s = strchr(dest, '#');
if (s && s[1] != 0)
{
float y = fz_find_html_target(ctx, doc->html, s+1);
if (y >= 0)
{
int page = y / doc->page_h;
if (yp) *yp = y - page * doc->page_h;
return page;
}
}
return -1;
}
static int
htdoc_count_pages(fz_context *ctx, fz_document *doc_)
{
html_document *doc = (html_document*)doc_;
int count = ceilf(doc->html->root->h / doc->page_h);
return count;
}
static void
htdoc_layout(fz_context *ctx, fz_document *doc_, float w, float h, float em)
{
html_document *doc = (html_document*)doc_;
if (doc->html && doc->html->root)
{
doc->page_margin[T] = fz_from_css_number(doc->html->root->style.margin[T], em, em);
doc->page_margin[B] = fz_from_css_number(doc->html->root->style.margin[B], em, em);
doc->page_margin[L] = fz_from_css_number(doc->html->root->style.margin[L], em, em);
doc->page_margin[R] = fz_from_css_number(doc->html->root->style.margin[R], em, em);
}
doc->page_w = w - doc->page_margin[L] - doc->page_margin[R];
doc->page_h = h - doc->page_margin[T] - doc->page_margin[B];
doc->em = em;
fz_layout_html(ctx, doc->html, doc->page_w, doc->page_h, doc->em);
}
static void
htdoc_drop_page(fz_context *ctx, fz_page *page_)
{
}
static fz_rect *
htdoc_bound_page(fz_context *ctx, fz_page *page_, fz_rect *bbox)
{
html_page *page = (html_page*)page_;
html_document *doc = page->doc;
bbox->x0 = 0;
bbox->y0 = 0;
bbox->x1 = doc->page_w + doc->page_margin[L] + doc->page_margin[R];
bbox->y1 = doc->page_h + doc->page_margin[T] + doc->page_margin[B];
return bbox;
}
static void
htdoc_run_page(fz_context *ctx, fz_page *page_, fz_device *dev, const fz_matrix *ctm, fz_cookie *cookie)
{
html_page *page = (html_page*)page_;
html_document *doc = page->doc;
fz_matrix local_ctm = *ctm;
int n = page->number;
fz_pre_translate(&local_ctm, doc->page_margin[L], doc->page_margin[T]);
fz_draw_html(ctx, dev, &local_ctm, doc->html, n * doc->page_h, (n+1) * doc->page_h);
}
static fz_link *
htdoc_load_links(fz_context *ctx, fz_page *page_)
{
html_page *page = (html_page*)page_;
html_document *doc = page->doc;
fz_link *head, *link;
head = fz_load_html_links(ctx, doc->html, page->number, doc->page_h, "");
for (link = head; link; link = link->next)
{
link->doc = doc;
/* Adjust for page margins */
link->rect.x0 += doc->page_margin[L];
link->rect.x1 += doc->page_margin[L];
link->rect.y0 += doc->page_margin[T];
link->rect.y1 += doc->page_margin[T];
}
return head;
}
static fz_page *
htdoc_load_page(fz_context *ctx, fz_document *doc_, int number)
{
html_document *doc = (html_document*)doc_;
html_page *page = fz_new_page(ctx, sizeof *page);
page->super.bound_page = htdoc_bound_page;
page->super.run_page_contents = htdoc_run_page;
page->super.load_links = htdoc_load_links;
page->super.drop_page = htdoc_drop_page;
page->doc = doc;
page->number = number;
return (fz_page*)page;
}
int
htdoc_lookup_metadata(fz_context *ctx, fz_document *doc_, const char *key, char *buf, int size)
{
if (!strcmp(key, "format"))
return (int)fz_strlcpy(buf, "XHTML", size);
return -1;
}
static fz_document *
htdoc_open_document_with_stream(fz_context *ctx, fz_stream *file)
{
html_document *doc;
fz_buffer *buf;
doc = fz_new_document(ctx, html_document);
doc->super.drop_document = htdoc_drop_document;
doc->super.layout = htdoc_layout;
doc->super.resolve_link = htdoc_resolve_link;
doc->super.count_pages = htdoc_count_pages;
doc->super.load_page = htdoc_load_page;
doc->super.lookup_metadata = htdoc_lookup_metadata;
doc->super.is_reflowable = 1;
doc->zip = fz_open_directory(ctx, ".");
doc->set = fz_new_html_font_set(ctx);
buf = fz_read_all(ctx, file, 0);
fz_try(ctx)
{
fz_write_buffer_byte(ctx, buf, 0);
doc->html = fz_parse_html(ctx, doc->set, doc->zip, ".", buf, fz_user_css(ctx));
}
fz_always(ctx)
fz_drop_buffer(ctx, buf);
fz_catch(ctx)
fz_rethrow(ctx);
return (fz_document*)doc;
}
static fz_document *
htdoc_open_document(fz_context *ctx, const char *filename)
{
char dirname[2048];
fz_buffer *buf;
html_document *doc;
fz_dirname(dirname, filename, sizeof dirname);
doc = fz_new_document(ctx, html_document);
doc->super.drop_document = htdoc_drop_document;
doc->super.layout = htdoc_layout;
doc->super.resolve_link = htdoc_resolve_link;
doc->super.count_pages = htdoc_count_pages;
doc->super.load_page = htdoc_load_page;
doc->super.lookup_metadata = htdoc_lookup_metadata;
doc->super.is_reflowable = 1;
doc->zip = fz_open_directory(ctx, dirname);
doc->set = fz_new_html_font_set(ctx);
buf = fz_read_file(ctx, filename);
fz_try(ctx)
{
fz_write_buffer_byte(ctx, buf, 0);
doc->html = fz_parse_html(ctx, doc->set, doc->zip, ".", buf, fz_user_css(ctx));
}
fz_always(ctx)
fz_drop_buffer(ctx, buf);
fz_catch(ctx)
fz_rethrow(ctx);
return (fz_document*)doc;
}
static int
htdoc_recognize(fz_context *doc, const char *magic)
{
char *ext = strrchr(magic, '.');
if (ext)
{
if (!fz_strcasecmp(ext, ".xml") || !fz_strcasecmp(ext, ".xhtml") ||
!fz_strcasecmp(ext, ".html") || !fz_strcasecmp(ext, ".htm") ||
!fz_strcasecmp(ext, ".fb2"))
return 100;
}
if (!strcmp(magic, "application/html+xml") || !strcmp(magic, "application/xml") || !strcmp(magic, "text/xml"))
return 100;
return 0;
}
fz_document_handler html_document_handler =
{
&htdoc_recognize,
&htdoc_open_document,
&htdoc_open_document_with_stream
};
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