From 5179418ae7f4497ad6fec2e7d1ac2a8ad7492fd8 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@artifex.com>
Date: Thu, 14 May 2015 00:19:44 +0200
Subject: epub: Apply @page selector margins.

---
 source/html/css-apply.c   | 23 +++++++++++++++++++++++
 source/html/epub-doc.c    | 11 +++++++----
 source/html/html-doc.c    | 14 ++++++++++----
 source/html/html-layout.c |  3 +++
 4 files changed, 43 insertions(+), 8 deletions(-)

(limited to 'source/html')

diff --git a/source/html/css-apply.c b/source/html/css-apply.c
index d72079e8..6d99c07d 100644
--- a/source/html/css-apply.c
+++ b/source/html/css-apply.c
@@ -623,6 +623,29 @@ fz_match_css(fz_context *ctx, fz_css_match *match, fz_css_rule *css, fz_xml *nod
 	}
 }
 
+void
+fz_match_css_at_page(fz_context *ctx, fz_css_match *match, fz_css_rule *css)
+{
+	fz_css_rule *rule;
+	fz_css_selector *sel;
+	fz_css_property *prop;
+
+	for (rule = css; rule; rule = rule->next)
+	{
+		sel = rule->selector;
+		while (sel)
+		{
+			if (sel->name && !strcmp(sel->name, "@page"))
+			{
+				for (prop = rule->declaration; prop; prop = prop->next)
+					add_property(match, prop->name, prop->value, selector_specificity(sel));
+				break;
+			}
+			sel = sel->next;
+		}
+	}
+}
+
 static fz_css_value *
 value_from_raw_property(fz_css_match *match, const char *name)
 {
diff --git a/source/html/epub-doc.c b/source/html/epub-doc.c
index b7b24c42..90c86493 100644
--- a/source/html/epub-doc.c
+++ b/source/html/epub-doc.c
@@ -37,10 +37,13 @@ epub_layout(fz_context *ctx, fz_document *doc_, float w, float h, float em)
 	epub_document *doc = (epub_document*)doc_;
 	epub_chapter *ch;
 
-	doc->page_margin[T] = em;
-	doc->page_margin[B] = em;
-	doc->page_margin[L] = 0;
-	doc->page_margin[R] = 0;
+	if (doc->spine && doc->spine->box)
+	{
+		doc->page_margin[T] = fz_from_css_number(doc->spine->box->style.margin[T], em, em);
+		doc->page_margin[B] = fz_from_css_number(doc->spine->box->style.margin[B], em, em);
+		doc->page_margin[L] = fz_from_css_number(doc->spine->box->style.margin[L], em, em);
+		doc->page_margin[R] = fz_from_css_number(doc->spine->box->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];
diff --git a/source/html/html-doc.c b/source/html/html-doc.c
index 90033717..04286f7c 100644
--- a/source/html/html-doc.c
+++ b/source/html/html-doc.c
@@ -44,13 +44,19 @@ static void
 htdoc_layout(fz_context *ctx, fz_document *doc_, float w, float h, float em)
 {
 	html_document *doc = (html_document*)doc_;
-	doc->page_margin[T] = em;
-	doc->page_margin[B] = em;
-	doc->page_margin[L] = 0;
-	doc->page_margin[R] = 0;
+
+	if (doc->box)
+	{
+		doc->page_margin[T] = fz_from_css_number(doc->box->style.margin[T], em, em);
+		doc->page_margin[B] = fz_from_css_number(doc->box->style.margin[B], em, em);
+		doc->page_margin[L] = fz_from_css_number(doc->box->style.margin[L], em, em);
+		doc->page_margin[R] = fz_from_css_number(doc->box->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->box, doc->page_w, doc->page_h, doc->em);
 }
 
diff --git a/source/html/html-layout.c b/source/html/html-layout.c
index 5fd3937b..52171ef8 100644
--- a/source/html/html-layout.c
+++ b/source/html/html-layout.c
@@ -3,6 +3,7 @@
 enum { T, R, B, L };
 
 static const char *default_css =
+"@page{margin:1em 0}"
 "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}"
@@ -1262,6 +1263,8 @@ fz_parse_html(fz_context *ctx, fz_html_font_set *set, fz_archive *zip, const cha
 
 	match.up = NULL;
 	match.count = 0;
+	fz_match_css_at_page(ctx, &match, css);
+	fz_apply_css_style(ctx, set, &box->style, &match);
 
 	generate_boxes(ctx, set, zip, base_uri, xml, box, css, &match, 0);
 
-- 
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