From 845875985942c1df3db94e7b73fccdc413c25a63 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@artifex.com>
Date: Wed, 14 Dec 2016 15:27:24 +0100
Subject: Move page size and margins into fz_html struct.

---
 source/html/epub-doc.c    | 49 ++++++++++++-----------------------------------
 source/html/html-doc.c    | 48 ++++++++--------------------------------------
 source/html/html-layout.c | 37 ++++++++++++++++++++++++++++-------
 3 files changed, 50 insertions(+), 84 deletions(-)

(limited to 'source/html')

diff --git a/source/html/epub-doc.c b/source/html/epub-doc.c
index ed52484c..590004f6 100644
--- a/source/html/epub-doc.c
+++ b/source/html/epub-doc.c
@@ -21,8 +21,6 @@ struct epub_chapter_s
 {
 	char *path;
 	int start;
-	float page_w, page_h, em;
-	float page_margin[4];
 	fz_html *html;
 	epub_chapter *next;
 };
@@ -55,8 +53,8 @@ epub_resolve_link(fz_context *ctx, fz_document *doc_, const char *dest, float *x
 				float y = fz_find_html_target(ctx, ch->html, s+1);
 				if (y >= 0)
 				{
-					int page = y / ch->page_h;
-					if (yp) *yp = y - page * ch->page_h;
+					int page = y / ch->html->page_h;
+					if (yp) *yp = y - page * ch->html->page_h;
 					return ch->start + page;
 				}
 				return -1;
@@ -89,15 +87,8 @@ epub_layout(fz_context *ctx, fz_document *doc_, float w, float h, float em)
 	for (ch = doc->spine; ch; ch = ch->next)
 	{
 		ch->start = count;
-		ch->em = em;
-		ch->page_margin[T] = fz_from_css_number(ch->html->root->style.margin[T], em, em);
-		ch->page_margin[B] = fz_from_css_number(ch->html->root->style.margin[B], em, em);
-		ch->page_margin[L] = fz_from_css_number(ch->html->root->style.margin[L], em, em);
-		ch->page_margin[R] = fz_from_css_number(ch->html->root->style.margin[R], em, em);
-		ch->page_w = w - ch->page_margin[L] - ch->page_margin[R];
-		ch->page_h = h - ch->page_margin[T] - ch->page_margin[B];
-		fz_layout_html(ctx, ch->html, ch->page_w, ch->page_h, ch->em);
-		count += ceilf(ch->html->root->h / ch->page_h);
+		fz_layout_html(ctx, ch->html, w, h, em);
+		count += ceilf(ch->html->root->h / ch->html->page_h);
 	}
 
 	epub_update_outline(ctx, doc_, doc->outline);
@@ -110,7 +101,7 @@ epub_count_pages(fz_context *ctx, fz_document *doc_)
 	epub_chapter *ch;
 	int count = 0;
 	for (ch = doc->spine; ch; ch = ch->next)
-		count += ceilf(ch->html->root->h / ch->page_h);
+		count += ceilf(ch->html->root->h / ch->html->page_h);
 	return count;
 }
 
@@ -130,13 +121,13 @@ epub_bound_page(fz_context *ctx, fz_page *page_, fz_rect *bbox)
 
 	for (ch = doc->spine; ch; ch = ch->next)
 	{
-		int cn = ceilf(ch->html->root->h / ch->page_h);
+		int cn = ceilf(ch->html->root->h / ch->html->page_h);
 		if (n < count + cn)
 		{
 			bbox->x0 = 0;
 			bbox->y0 = 0;
-			bbox->x1 = ch->page_w + ch->page_margin[L] + ch->page_margin[R];
-			bbox->y1 = ch->page_h + ch->page_margin[T] + ch->page_margin[B];
+			bbox->x1 = ch->html->page_w + ch->html->page_margin[L] + ch->html->page_margin[R];
+			bbox->y1 = ch->html->page_h + ch->html->page_margin[T] + ch->html->page_margin[B];
 			return bbox;
 		}
 		count += cn;
@@ -152,17 +143,15 @@ epub_run_page(fz_context *ctx, fz_page *page_, fz_device *dev, const fz_matrix *
 	epub_page *page = (epub_page*)page_;
 	epub_document *doc = page->doc;
 	epub_chapter *ch;
-	fz_matrix local_ctm = *ctm;
 	int n = page->number;
 	int count = 0;
 
 	for (ch = doc->spine; ch; ch = ch->next)
 	{
-		int cn = ceilf(ch->html->root->h / ch->page_h);
+		int cn = ceilf(ch->html->root->h / ch->html->page_h);
 		if (n < count + cn)
 		{
-			fz_pre_translate(&local_ctm, ch->page_margin[L], ch->page_margin[T]);
-			fz_draw_html(ctx, dev, &local_ctm, ch->html, (n-count) * ch->page_h, (n-count+1) * ch->page_h);
+			fz_draw_html(ctx, dev, ctm, ch->html, n-count);
 			break;
 		}
 		count += cn;
@@ -177,26 +166,12 @@ epub_load_links(fz_context *ctx, fz_page *page_)
 	epub_chapter *ch;
 	int n = page->number;
 	int count = 0;
-	fz_link *head, *link;
 
 	for (ch = doc->spine; ch; ch = ch->next)
 	{
-		int cn = ceilf(ch->html->root->h / ch->page_h);
+		int cn = ceilf(ch->html->root->h / ch->html->page_h);
 		if (n < count + cn)
-		{
-			head = fz_load_html_links(ctx, ch->html, n - count, ch->page_h, ch->path);
-			for (link = head; link; link = link->next)
-			{
-				link->doc = doc;
-
-				/* Adjust for page margins */
-				link->rect.x0 += ch->page_margin[L];
-				link->rect.x1 += ch->page_margin[L];
-				link->rect.y0 += ch->page_margin[T];
-				link->rect.y1 += ch->page_margin[T];
-			}
-			return head;
-		}
+			return fz_load_html_links(ctx, ch->html, n - count, ch->path);
 		count += cn;
 	}
 
diff --git a/source/html/html-doc.c b/source/html/html-doc.c
index 8d602030..05a86d83 100644
--- a/source/html/html-doc.c
+++ b/source/html/html-doc.c
@@ -10,8 +10,6 @@ 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;
 };
 
@@ -41,8 +39,8 @@ htdoc_resolve_link(fz_context *ctx, fz_document *doc_, const char *dest, float *
 		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;
+			int page = y / doc->html->page_h;
+			if (yp) *yp = y - page * doc->html->page_h;
 			return page;
 		}
 	}
@@ -54,7 +52,7 @@ 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);
+	int count = ceilf(doc->html->root->h / doc->html->page_h);
 	return count;
 }
 
@@ -63,19 +61,7 @@ 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);
+	fz_layout_html(ctx, doc->html, w, h, em);
 }
 
 static void
@@ -90,8 +76,8 @@ htdoc_bound_page(fz_context *ctx, fz_page *page_, fz_rect *bbox)
 	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];
+	bbox->x1 = doc->html->page_w + doc->html->page_margin[L] + doc->html->page_margin[R];
+	bbox->y1 = doc->html->page_h + doc->html->page_margin[T] + doc->html->page_margin[B];
 	return bbox;
 }
 
@@ -100,12 +86,7 @@ htdoc_run_page(fz_context *ctx, fz_page *page_, fz_device *dev, const fz_matrix
 {
 	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);
+	fz_draw_html(ctx, dev, ctm, doc->html, page->number);
 }
 
 static fz_link *
@@ -113,20 +94,7 @@ 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;
+	return fz_load_html_links(ctx, doc->html, page->number, "");
 }
 
 static fz_page *
diff --git a/source/html/html-layout.c b/source/html/html-layout.c
index b958a3a3..547ecf96 100644
--- a/source/html/html-layout.c
+++ b/source/html/html-layout.c
@@ -1865,23 +1865,25 @@ static void draw_block_box(fz_context *ctx, fz_html_box *box, float page_top, fl
 }
 
 void
-fz_draw_html(fz_context *ctx, fz_device *dev, const fz_matrix *ctm, fz_html *html, float page_top, float page_bot)
+fz_draw_html(fz_context *ctx, fz_device *dev, const fz_matrix *ctm, fz_html *html, int page)
 {
 	fz_matrix local_ctm = *ctm;
 	hb_buffer_t *hb_buf = NULL;
 	int unlocked = 0;
+	float page_top = page * html->page_h;
+	float page_bot = (page + 1) * html->page_h;
 
 	fz_var(hb_buf);
 	fz_var(unlocked);
 
-	hb_lock(ctx);
+	fz_pre_translate(&local_ctm, html->page_margin[L], html->page_margin[T] - page_top);
 
+	hb_lock(ctx);
 	fz_try(ctx)
 	{
 		hb_buf = hb_buffer_create();
 		hb_unlock(ctx);
 		unlocked = 1;
-		fz_pre_translate(&local_ctm, 0, -page_top);
 		draw_block_box(ctx, html->root, page_top, page_bot, dev, &local_ctm, hb_buf);
 	}
 	fz_always(ctx)
@@ -2014,11 +2016,24 @@ static fz_link *load_link_box(fz_context *ctx, fz_html_box *box, fz_link *head,
 }
 
 fz_link *
-fz_load_html_links(fz_context *ctx, fz_html *html, int page, int page_h, const char *file)
+fz_load_html_links(fz_context *ctx, fz_html *html, int page, const char *file)
 {
+	fz_link *link, *head;
 	char dir[2048];
 	fz_dirname(dir, file, sizeof dir);
-	return load_link_box(ctx, html->root, NULL, page, page_h, dir, file);
+
+	head = load_link_box(ctx, html->root, NULL, page, html->page_h, dir, file);
+
+	for (link = head; link; link = link->next)
+	{
+		/* Adjust for page margins */
+		link->rect.x0 += html->page_margin[L];
+		link->rect.x1 += html->page_margin[L];
+		link->rect.y0 += html->page_margin[T];
+		link->rect.y1 += html->page_margin[T];
+	}
+
+	return head;
 }
 
 static fz_html_flow *
@@ -2328,6 +2343,14 @@ fz_layout_html(fz_context *ctx, fz_html *html, float w, float h, float em)
 	fz_var(hb_buf);
 	fz_var(unlocked);
 
+	html->page_margin[T] = fz_from_css_number(html->root->style.margin[T], em, em);
+	html->page_margin[B] = fz_from_css_number(html->root->style.margin[B], em, em);
+	html->page_margin[L] = fz_from_css_number(html->root->style.margin[L], em, em);
+	html->page_margin[R] = fz_from_css_number(html->root->style.margin[R], em, em);
+
+	html->page_w = w - html->page_margin[L] - html->page_margin[R];
+	html->page_h = h - html->page_margin[T] - html->page_margin[B];
+
 	hb_lock(ctx);
 
 	fz_try(ctx)
@@ -2337,12 +2360,12 @@ fz_layout_html(fz_context *ctx, fz_html *html, float w, float h, float em)
 		hb_unlock(ctx);
 
 		box->em = em;
-		box->w = w;
+		box->w = html->page_w;
 		box->h = 0;
 
 		if (box->down)
 		{
-			layout_block(ctx, box->down, box, h, 0, hb_buf);
+			layout_block(ctx, box->down, box, html->page_h, 0, hb_buf);
 			box->h = box->down->h;
 		}
 	}
-- 
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