Apply sans-serif font for title and heading

Author: mrotteveel

.gitattributes

@@ -2,9 +2,11 @@
 *.xml           text
 *.xsl           text
 *.docbook       text
+*.adoc          text
 *.css           text    eol=lf
 *.bat           text    eol=crlf
 *.sh            text    eol=lf
+*.yml           text
 
 *.bmp           binary
 *.gif           binary
@@ -13,5 +15,6 @@
 *.jpg           binary
 *.jpeg          binary
 *.png           binary
+*.ttf           binary
 
 /gradlew        text    eol=lf

build.gradle

@@ -64,7 +64,7 @@ def asciidocPdf = tasks.register('asciidocPdf', FbAsciidocPdfTask) {
     description 'Generate PDF documentation from asciidoc'
     baseDirFollowsSourceFile()
     attributes 'revnumber': null, 'source-highlighter': 'rouge', 'media': 'screen', 'toc': 'macro', 'compress': '',
-            'icon-set': 'fas'
+            'icon-set': 'fas', 'pdf-fontsdir': "${file('src/theme/fonts')},GEM_FONTS_DIR"
     theme 'firebird'
     asciidoctorj {
         modules {

src/theme/firebird-pdf/firebird-theme.yml

@@ -1,4 +1,12 @@
 extends: default-with-fallback-font
+font:
+  catalog:
+    merge: true
+    Noto Sans:
+      normal: NotoSans-Regular.ttf
+      bold: NotoSans-Bold.ttf
+      italic: NotoSans-Italic.ttf
+      bold_italic: NotoSans-BoldItalic.ttf
 base:
   align: justify
 firebird:
@@ -12,13 +20,18 @@ link:
 literal:
   font_color: null
 heading:
+  font_family: Noto Sans
   font_color: $firebird_color_blue
 title_page:
   align: center 
   logo_image: image:./images/firebird_logo_400x400.png[pdfwidth=25%,align=center]
   title:
+    font_family: Noto Sans
+    font_style: bold
     font_color: $firebird_color_blue
   subtitle:
+    font_family: Noto Sans
+    font_style: italic
     font_color: $firebird_color_blue
 code:
   background_color: $firebird_color_light_yellow

src/theme/fonts/LICENSE_OFL-NotoSans.txt

@@ -0,0 +1,92 @@
+This Font Software is licensed under the SIL Open Font License,
+Version 1.1.
+
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font
+creation efforts of academic and linguistic communities, and to
+provide a free and open framework in which fonts may be shared and
+improved in partnership with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply to
+any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software
+components as distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to,
+deleting, or substituting -- in part or in whole -- any of the
+components of the Original Version, by changing formats or by porting
+the Font Software to a new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed,
+modify, redistribute, and sell modified and unmodified copies of the
+Font Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components, in
+Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the
+corresponding Copyright Holder. This restriction only applies to the
+primary font name as presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created using
+the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.