[gnumeric] xlsx: export font properties for chart titles.

[Morten Welinder <mortenw src gnome org>]

commit 5e3cc54a14aafa300c1d61e449e5d991c6301b3d
Author: Morten Welinder <terra gnome org>
Date:   Thu Jan 22 13:32:38 2015 -0500

    xlsx: export font properties for chart titles.

 plugins/excel/xlsx-write-drawing.c |   54 +++++++++++++++++++++++++++++------
 samples/graph-tests.gnumeric       |  Bin 7845 -> 7976 bytes
 2 files changed, 44 insertions(+), 10 deletions(-)
---
diff --git a/plugins/excel/xlsx-write-drawing.c b/plugins/excel/xlsx-write-drawing.c
index 4705671..cc8efc0 100644
--- a/plugins/excel/xlsx-write-drawing.c
+++ b/plugins/excel/xlsx-write-drawing.c
@@ -286,23 +286,57 @@ xlsx_write_chart_text (XLSXWriteState *state, GsfXMLOut *xml,
 {
        /* I don't really know what I am doing here.  */
        char *text = go_data_get_scalar_string (data);
+       gboolean has_font_color = ((style->interesting_fields & GO_STYLE_FONT) &&
+                                  !style->font.auto_color);
+       gboolean has_font = ((style->interesting_fields & GO_STYLE_FONT) &&
+                            TRUE /* !style->font.auto_font */);
 
        gsf_xml_out_start_element (xml, "c:tx");
        gsf_xml_out_start_element (xml, "c:rich");
 
-       gsf_xml_out_start_element (xml, "a:bodyPr");
-       gsf_xml_out_end_element (xml);
+       gsf_xml_out_simple_element (xml, "a:bodyPr", NULL);
 
        gsf_xml_out_start_element (xml, "a:p");
        gsf_xml_out_start_element (xml, "a:r");
-       gsf_xml_out_start_element (xml, "a:t");
-       gsf_xml_out_add_cstr (xml, NULL, text);
-       gsf_xml_out_end_element (xml);
-       gsf_xml_out_end_element (xml);
-       gsf_xml_out_end_element (xml);
 
-       gsf_xml_out_end_element (xml);
-       gsf_xml_out_end_element (xml);
+       if (has_font_color || has_font) {
+               GOFont const *font = style->font.font;
+               PangoFontDescription *desc = font->desc;
+
+               gsf_xml_out_start_element (xml, "a:rPr");
+               if (has_font) {
+                       int sz = pango_font_description_get_size (desc);
+                       if (sz > 0) {
+                               sz = CLAMP (sz, 1 * PANGO_SCALE, 4000 * PANGO_SCALE);
+                               gsf_xml_out_add_uint (xml, "sz", sz * 100 / PANGO_SCALE);
+                       }
+
+                       if (pango_font_description_get_weight (desc) > PANGO_WEIGHT_NORMAL)
+                               xlsx_add_bool (xml, "b", TRUE);
+                       if (pango_font_description_get_style (desc) > PANGO_STYLE_NORMAL)
+                               xlsx_add_bool (xml, "i", TRUE);
+               }
+               if (has_font_color) {
+                       gsf_xml_out_start_element (xml, "a:solidFill");
+                       xlsx_write_rgbarea (xml, style->font.color);
+                       gsf_xml_out_end_element (xml);
+               }
+               if (has_font) {
+                       gsf_xml_out_start_element (xml, "a:latin");
+                       gsf_xml_out_add_cstr (xml, "typeface",
+                                             pango_font_description_get_family (desc));
+                       gsf_xml_out_end_element (xml);
+               }
+               gsf_xml_out_end_element (xml); /* </a:rPr> */
+       }
+
+       gsf_xml_out_simple_element (xml, "a:t", text);
+
+       gsf_xml_out_end_element (xml); /* </a:r> */
+       gsf_xml_out_end_element (xml); /* </a:p> */
+
+       gsf_xml_out_end_element (xml); /* </c:rich> */
+       gsf_xml_out_end_element (xml); /* </c:tx> */
 
        xlsx_write_go_style (xml, style);
 
@@ -375,7 +409,7 @@ xlsx_write_axis (XLSXWriteState *state, GsfXMLOut *xml, GogAxis *axis, GogAxisTy
 
        gsf_xml_out_start_element (xml, "c:numFmt");
        format = gog_axis_get_format (axis);
-       gsf_xml_out_add_bool (xml, "sourceLinked", format == NULL || go_format_is_general (format));
+       xlsx_add_bool (xml, "sourceLinked", format == NULL || go_format_is_general (format));
        format = gog_axis_get_effective_format (axis);
        gsf_xml_out_add_cstr (xml, "formatCode", (format)? go_format_as_XL (format): "General");
        gsf_xml_out_end_element (xml);
diff --git a/samples/graph-tests.gnumeric b/samples/graph-tests.gnumeric
index 57eb36c..6cc1f02 100644
Binary files a/samples/graph-tests.gnumeric and b/samples/graph-tests.gnumeric differ