From ddf0dbf478b2998dbab95d15b3b5b5ba3b59652a Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@artifex.com>
Date: Sat, 24 Nov 2012 14:28:29 +0100
Subject: xps: Save text content in XML nodes.

New accessor xml_text() will return NULL or text content of a node.
Tag names for text nodes is the empty string "".

Fix bug 692191.
---
 xps/xps_xml.c | 91 ++++++++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 69 insertions(+), 22 deletions(-)

(limited to 'xps/xps_xml.c')

diff --git a/xps/xps_xml.c b/xps/xps_xml.c
index 8daee00b..e89a24d2 100644
--- a/xps/xps_xml.c
+++ b/xps/xps_xml.c
@@ -10,6 +10,7 @@ struct attribute
 struct element
 {
 	char name[40];
+	char *text;
 	struct attribute *atts;
 	struct element *up, *down, *next;
 };
@@ -28,21 +29,25 @@ static inline void indent(int n)
 void xml_print_element(struct element *item, int level)
 {
 	while (item) {
-		struct attribute *att;
-		indent(level);
-		printf("<%s", item->name);
-		for (att = item->atts; att; att = att->next)
-			printf(" %s=\"%s\"", att->name, att->value);
-		if (item->down) {
-			printf(">\n");
-			xml_print_element(item->down, level + 1);
+		if (item->text) {
+			printf("%s\n", item->text);
+		} else {
+			struct attribute *att;
 			indent(level);
-			printf("</%s>\n", item->name);
+			printf("<%s", item->name);
+			for (att = item->atts; att; att = att->next)
+				printf(" %s=\"%s\"", att->name, att->value);
+			if (item->down) {
+				printf(">\n");
+				xml_print_element(item->down, level + 1);
+				indent(level);
+				printf("</%s>\n", item->name);
+			}
+			else {
+				printf("/>\n");
+			}
+			item = item->next;
 		}
-		else {
-			printf("/>\n");
-		}
-		item = item->next;
 	}
 }
 
@@ -56,6 +61,11 @@ struct element *xml_down(struct element *item)
 	return item->down;
 }
 
+char *xml_text(struct element *item)
+{
+	return item->text;
+}
+
 char *xml_tag(struct element *item)
 {
 	return item->name;
@@ -85,6 +95,8 @@ void xml_free_element(fz_context *ctx, struct element *item)
 {
 	while (item) {
 		struct element *next = item->next;
+		if (item->text)
+			fz_free(ctx, item->text);
 		if (item->atts)
 			xml_free_attribute(ctx, item->atts);
 		if (item->down)
@@ -135,6 +147,19 @@ static int xml_parse_entity(int *c, char *a)
 	return 1;
 }
 
+static inline int isname(int c)
+{
+	return c == '.' || c == '-' || c == '_' || c == ':' ||
+		(c >= '0' && c <= '9') ||
+		(c >= 'A' && c <= 'Z') ||
+		(c >= 'a' && c <= 'z');
+}
+
+static inline int iswhite(int c)
+{
+	return c == ' ' || c == '\r' || c == '\n' || c == '\t';
+}
+
 static void xml_emit_open_tag(struct parser *parser, char *a, char *b)
 {
 	struct element *head, *tail;
@@ -146,6 +171,7 @@ static void xml_emit_open_tag(struct parser *parser, char *a, char *b)
 	head->name[b - a] = 0;
 
 	head->atts = NULL;
+	head->text = NULL;
 	head->up = parser->head;
 	head->down = NULL;
 	head->next = NULL;
@@ -205,17 +231,37 @@ static void xml_emit_close_tag(struct parser *parser)
 		parser->head = parser->head->up;
 }
 
-static inline int isname(int c)
+static void xml_emit_text(struct parser *parser, char *a, char *b)
 {
-	return c == '.' || c == '-' || c == '_' || c == ':' ||
-		(c >= '0' && c <= '9') ||
-		(c >= 'A' && c <= 'Z') ||
-		(c >= 'a' && c <= 'z');
-}
+	static char *empty = "";
+	struct element *head;
+	char *s;
+	int c;
 
-static inline int iswhite(int c)
-{
-	return c == ' ' || c == '\r' || c == '\n' || c == '\t';
+	/* Skip all-whitespace text nodes */
+	for (s = a; s < b; s++)
+		if (!iswhite(*s))
+			break;
+	if (s == b)
+		return;
+
+	xml_emit_open_tag(parser, empty, empty);
+	head = parser->head;
+
+	/* entities are all longer than UTFmax so runetochar is safe */
+	s = head->text = fz_malloc(parser->ctx, b - a + 1);
+	while (a < b) {
+		if (*a == '&') {
+			a += xml_parse_entity(&c, a);
+			s += fz_runetochar(s, c);
+		}
+		else {
+			*s++ = *a++;
+		}
+	}
+	*s = 0;
+
+	xml_emit_close_tag(parser);
 }
 
 static char *xml_parse_document_imp(struct parser *x, char *p)
@@ -226,6 +272,7 @@ static char *xml_parse_document_imp(struct parser *x, char *p)
 parse_text:
 	mark = p;
 	while (*p && *p != '<') ++p;
+	xml_emit_text(x, mark, p);
 	if (*p == '<') { ++p; goto parse_element; }
 	return NULL;
 
-- 
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