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| author | Tor Andersson <tor.andersson@artifex.com> | 2014-09-08 15:49:59 +0200 |
|---|---|---|
| committer | Tor Andersson <tor.andersson@artifex.com> | 2014-12-03 12:25:51 +0100 |
| commit | 9d1482bc78d72ba330c2130170b49b4e18702623 (patch) | |
| tree | e7f87a3266419e7bb238095e3fa146953dcb9e28 /source/html/layout.c | |
| parent | 4b8638cfa35ecacf7418ec8933f971577652bb79 (diff) | |
| download | mupdf-9d1482bc78d72ba330c2130170b49b4e18702623.tar.xz | |
html: CSS lexer and parser.
Diffstat (limited to 'source/html/layout.c')
| -rw-r--r-- | source/html/layout.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/source/html/layout.c b/source/html/layout.c new file mode 100644 index 00000000..91e20b9f --- /dev/null +++ b/source/html/layout.c @@ -0,0 +1,153 @@ +#include "mupdf/html.h" + +static const char *default_css = +"html,address,blockquote,body,dd,div,dl,dt,h1,h2,h3,h4,h5,h6,ol,p,ul,center,hr,pre{display:block}" +"span{display:inline}" +"li{display:list-item}" +"head{display:none}" +"body{margin:0px}" +"h1{font-size:2em;margin:.67em 0}" +"h2{font-size:1.5em;margin:.75em 0}" +"h3{font-size:1.17em;margin:.83em 0}" +"h4,p,blockquote,ul,ol,dl,dir,menu{margin:1.12em 0}" +"h5{font-size:.83em;margin:1.5em 0}" +"h6{font-size:.75em;margin:1.67em 0}" +"h1,h2,h3,h4,h5,h6,b,strong{font-weight:bold}" +"blockquote{margin-left:40px;margin-right:40px}" +"i,cite,em,var,address{font-style:italic}" +"pre,tt,code,kbd,samp{font-family:monospace}" +"pre{white-space:pre}" +"big{font-size:1.17em}" +"small,sub,sup{font-size:.83em}" +"sub{vertical-align:sub}" +"sup{vertical-align:super}" +"s,strike,del{text-decoration:line-through}" +"hr{border:1pxinset}" +"ol,ul,dir,menu,dd{margin-left:40px}" +"ol{list-style-type:decimal}" +"ol ul,ul ol,ul ul,ol ol{margin-top:0;margin-bottom:0}" +"u,ins{text-decoration:underline}" +"center{text-align:center}" +"svg{display:none}"; + +char dirname[2048]; +char filename[2048]; + +static char *concat_text(fz_xml *root) +{ + fz_xml *node; + int i = 0, n = 1; + char *s; + for (node = fz_xml_down(root); node; node = fz_xml_next(node)) + { + const char *text = fz_xml_text(node); + n += text ? strlen(text) : 0; + } + s = malloc(n); + for (node = fz_xml_down(root); node; node = fz_xml_next(node)) + { + const char *text = fz_xml_text(node); + if (text) { + n = strlen(text); + memcpy(s+i, text, n); + i += n; + } + } + s[i] = 0; + return s; +} + +static struct rule *load_css(fz_context *ctx, struct rule *css, fz_xml *root) +{ + fz_xml *node; + for (node = root; node; node = fz_xml_next(node)) { + const char *tag = fz_xml_tag(node); +#if 0 + if (tag && !strcmp(tag, "link")) { + char *rel = fz_xml_att(node, "rel"); + if (rel && !strcasecmp(rel, "stylesheet")) { + char *type = fz_xml_att(node, "type"); + if ((type && !strcmp(type, "text/css")) || !type) { + char *href = fz_xml_att(node, "href"); + strcpy(filename, dirname); + strcat(filename, href); + css = css_parse_file(css, filename); + } + } + } +#endif + if (tag && !strcmp(tag, "style")) { +printf("found inline style sheet!\n"); + char *s = concat_text(node); +printf("'%s'\n", s); + css = fz_parse_css(ctx, css, s); + } + if (fz_xml_down(node)) + css = load_css(ctx, css, fz_xml_down(node)); + } + return css; +} + +static void layout_text(struct rule *rule, struct style *style, fz_xml *node) +{ + printf("%s\n", fz_xml_text(node)); +} + +static void layout_tree(struct rule *rule, struct style *up, fz_xml *node) +{ + while (node) + { + struct style style; + style.up = up; + style.count = 0; + + if (fz_xml_tag(node)) + { + printf("open '%s'\n", fz_xml_tag(node)); + struct computed_style cstyle; + apply_styles(rule, &style, node); + + // TODO: check inline style attribute! + //s = fz_xml_att(node, "style"); + //if (s) { + // istyle = parse_declarations(s); + // apply_styles(istyle); + //} + + compute_style(&cstyle, &style); + print_style(&cstyle); + } + else + layout_text(rule, &style, node); + + // TOOD: <br> + // TODO: <img> + + if (fz_xml_down(node)) + layout_tree(rule, &style, fz_xml_down(node)); + + printf("end\n"); + node = fz_xml_next(node); + } +} + +void +html_layout_document(html_document *doc, float w, float h) +{ + struct rule *css = NULL; + +#if 0 + strcpy(dirname, argv[i]); + s = strrchr(dirname, '/'); + if (!s) s = strrchr(dirname, '\\'); + if (s) s[1] = 0; + else strcpy(dirname, "./"); +#endif + + css = fz_parse_css(doc->ctx, NULL, default_css); + css = load_css(doc->ctx, css, doc->root); + + print_rules(css); + + layout_tree(css, NULL, doc->root); +} |