[PATCH 1/2] stkutil: display text attributes as html

[Kristen Carlson Accardi <kristen@linux.intel.com>]

[-- Attachment #1: Type: text/plain, Size: 7113 bytes --]

---
 src/stkutil.c |  167 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/stkutil.h |   32 +++++++++++
 2 files changed, 199 insertions(+), 0 deletions(-)

diff --git a/src/stkutil.c b/src/stkutil.c
index 6f072e7..73449e2 100644
--- a/src/stkutil.c
+++ b/src/stkutil.c
@@ -26,6 +26,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <stdint.h>
+#include <stdio.h>
 
 #include <glib.h>
 
@@ -5819,3 +5820,169 @@ const unsigned char *stk_pdu_from_envelope(const struct stk_envelope *envelope,
 
 	return pdu;
 }
+
+static const char *html_colors[] = {
+	"#000000", /* Black */
+	"#808080", /* Dark Grey */
+	"#C11B17", /* Dark Red */
+	"#FBB117", /* Dark Yellow */
+	"#347235", /* Dark Green */
+	"#307D7E", /* Dark Cyan */
+	"#0000A0", /* Dark Blue */
+	"#C031C7", /* Dark Magenta */
+	"#C0C0C0", /* Grey */
+	"#FFFFFF", /* White */
+	"#FF0000", /* Bright Red */
+	"#FFFF00", /* Bright Yellow */
+	"#00FF00", /* Bright Green */
+	"#00FFFF", /* Bright Cyan */
+	"#0000FF", /* Bright Blue */
+	"#FF00FF", /* Bright Magenta */
+};
+
+static void end_format(GString *string, guint8 code)
+{
+	g_string_append(string, "</span>");
+
+	if ((code & STK_TEXT_FORMAT_ALIGN_MASK) != STK_TEXT_FORMAT_NO_ALIGN)
+		g_string_append(string, "</div>");
+}
+
+static void start_format(GString *string, guint8 code, guint8 color)
+{
+	guint8 align = code & STK_TEXT_FORMAT_ALIGN_MASK;
+	guint8 font = code & STK_TEXT_FORMAT_FONT_MASK;
+	guint8 style = code & STK_TEXT_FORMAT_STYLE_MASK;
+	int fg = color & 0x0f;
+	int bg = (color >> 4) & 0x0f;
+
+	/* align formatting applies to a block of test */
+	if (align != STK_TEXT_FORMAT_NO_ALIGN)
+		g_string_append(string, "<div style=\"");
+
+	if (align == STK_TEXT_FORMAT_RIGHT_ALIGN)
+		g_string_append(string, "text-align: right;\">");
+	else if (align == STK_TEXT_FORMAT_CENTER_ALIGN)
+		g_string_append(string, "text-align: center;\">");
+	else if (align == STK_TEXT_FORMAT_LEFT_ALIGN)
+		g_string_append(string, "text-align: left;\">");
+
+	/* font, style, and color are inline */
+	g_string_append(string, "<span style=\"");
+
+	if (font == STK_TEXT_FORMAT_FONT_SIZE_LARGE)
+		g_string_append(string, "font-size: big;");
+	else if (font == STK_TEXT_FORMAT_FONT_SIZE_SMALL)
+		g_string_append(string, "font-size: small;");
+
+	if (style == STK_TEXT_FORMAT_STYLE_BOLD)
+		g_string_append(string, "font-weight: bold;");
+	else if (style == STK_TEXT_FORMAT_STYLE_ITALIC)
+		g_string_append(string, "font-style: italic;");
+	else if (style == STK_TEXT_FORMAT_STYLE_UNDERLINED)
+		g_string_append(string, "text-decoration: underline;");
+	else if (style == STK_TEXT_FORMAT_STYLE_STRIKETHROUGH)
+		g_string_append(string, "text-decoration: line-through;");
+
+	/* add any color */
+	if (fg)
+		g_string_append_printf(string, "color: %s;", html_colors[fg]);
+	if (bg)
+		g_string_append_printf(string, "background-color: %s;",
+						html_colors[bg]);
+	g_string_append(string, "\">");
+}
+
+char *stk_text_to_html(char *text, int text_len,
+				const unsigned char *attrs, int attrs_len)
+{
+	GString *string = g_string_sized_new(text_len + 1);
+	gint formats[257];  /* maximum number of chars in text + 1 */
+	int pos = 0, attr, i, j, prev_attr;
+	guint8 start, end, code, color, len, align;
+
+	/* we will need formatting at the position beyond the last char */
+	for (i = 0; i <= text_len; i++)
+		formats[i] = STK_TEXT_FORMAT_INIT;
+
+	i = 0;
+
+	while (i < attrs_len) {
+		start = attrs[i++];
+		len = attrs[i++];
+		code = attrs[i++];
+
+		if (i < attrs_len)
+			color = attrs[i++];
+		else
+			color = 0;
+
+		if (len == 0)
+			end = text_len;
+		else
+			end = start + len;
+
+		/* sanity check values */
+		if (start > end || end > text_len)
+			continue;
+
+		/*
+		 * if the alignment is the same as either the default
+		 * or the last alignment used, don't set any alignment
+		 * value.
+		 */
+		if (start == 0)
+			align = STK_DEFAULT_TEXT_ALIGNMENT;
+		else {
+			align = get_align(formats[start - 1]);
+			if (align == STK_TEXT_FORMAT_NO_ALIGN)
+				align = STK_DEFAULT_TEXT_ALIGNMENT;
+		}
+
+		if ((code & STK_TEXT_FORMAT_ALIGN_MASK) == align)
+			code |= STK_TEXT_FORMAT_NO_ALIGN;
+
+		attr = make_attr(start, code, color);
+
+		for (j = start; j < end; j++)
+			formats[j] = attr;
+	}
+
+	prev_attr = STK_TEXT_FORMAT_INIT;
+
+	while (pos <= text_len) {
+		attr = formats[pos];
+		if (attr != prev_attr) {
+			if (prev_attr != STK_TEXT_FORMAT_INIT)
+				end_format(string, get_code(attr));
+
+			if (attr != STK_TEXT_FORMAT_INIT)
+				start_format(string, get_code(attr),
+						get_color(attr));
+
+			prev_attr = attr;
+		}
+
+		if (pos == text_len)
+			break;
+
+		if (text[pos] == '\n')
+			g_string_append(string, "<br/>");
+		else if (text[pos] == '\r') {
+			g_string_append(string, "<br/>");
+			if ((pos + 1 < text_len) && (text[pos + 1] == '\n'))
+				pos++;
+		} else if (text[pos] == '<')
+			g_string_append(string, "&lt;");
+		else if (text[pos] == '>')
+			g_string_append(string, "&gt;");
+		else if (text[pos] == '&')
+			g_string_append(string, "&amp;");
+		else
+			g_string_append_c(string, text[pos]);
+		pos++;
+	}
+
+	/* return characters from string. Caller must free char data */
+	return g_string_free(string, FALSE);
+}
diff --git a/src/stkutil.h b/src/stkutil.h
index ca4817e..fbdbc21 100644
--- a/src/stkutil.h
+++ b/src/stkutil.h
@@ -1635,6 +1635,36 @@ struct stk_envelope {
 	};
 };
 
+#define STK_TEXT_FORMAT_ALIGN_MASK 0x03
+#define STK_TEXT_FORMAT_FONT_MASK 0x0C
+#define STK_TEXT_FORMAT_STYLE_MASK 0xF0
+#define STK_DEFAULT_TEXT_ALIGNMENT 0x00
+#define STK_TEXT_FORMAT_INIT -1
+
+#define get_code(attr) \
+	((attr >> 16) & 0xFF)
+#define get_align(attr) \
+	((attr >> 16) & STK_TEXT_FORMAT_ALIGN_MASK)
+#define get_color(attr) \
+	((attr >> 24) & 0xFF)
+#define make_attr(start, code, color) \
+	(start | (code << 16) | (color << 24))
+
+/* Defined in ETSI 123 40 9.2.3.24.10.1.1 */
+enum stk_text_format_code {
+	STK_TEXT_FORMAT_LEFT_ALIGN = 0x00,
+	STK_TEXT_FORMAT_CENTER_ALIGN = 0x01,
+	STK_TEXT_FORMAT_RIGHT_ALIGN = 0x02,
+	STK_TEXT_FORMAT_NO_ALIGN = 0x03,
+	STK_TEXT_FORMAT_FONT_SIZE_LARGE = 0x04,
+	STK_TEXT_FORMAT_FONT_SIZE_SMALL = 0x08,
+	STK_TEXT_FORMAT_FONT_SIZE_RESERVED = 0x0c,
+	STK_TEXT_FORMAT_STYLE_BOLD = 0x10,
+	STK_TEXT_FORMAT_STYLE_ITALIC = 0x20,
+	STK_TEXT_FORMAT_STYLE_UNDERLINED = 0x40,
+	STK_TEXT_FORMAT_STYLE_STRIKETHROUGH = 0x80,
+};
+
 struct stk_command *stk_command_new_from_pdu(const unsigned char *pdu,
 						unsigned int len);
 void stk_command_free(struct stk_command *command);
@@ -1643,3 +1673,5 @@ const unsigned char *stk_pdu_from_response(const struct stk_response *response,
 						unsigned int *out_length);
 const unsigned char *stk_pdu_from_envelope(const struct stk_envelope *envelope,
 						unsigned int *out_length);
+char *stk_text_to_html(char *text, int text_len,
+				const unsigned char *attrs, int attrs_len);
-- 
1.6.6.1