GNOME.org
 

[pango/matthiasc/for-main: 13/13] Add docs for new attributes


commit a6ffe09f3dacab145abdf4da8025b6040fb69bb0
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Sep 1 10:47:04 2021 -0400

    Add docs for new attributes

 docs/baseline-shift-dark.png  | Bin 0 -> 14806 bytes
 docs/baseline-shift-light.png | Bin 0 -> 10055 bytes
 docs/baseline-shift.svg       | 740 ++++++++++++++++++++++++++++++++++++++++++
 docs/meson.build              |   2 +
 docs/pango.toml.in            |   2 +
 docs/pango_markup.md          |  10 +
 pango/pango-attributes.c      |  27 ++
 7 files changed, 781 insertions(+)
---
diff --git a/docs/baseline-shift-dark.png b/docs/baseline-shift-dark.png
new file mode 100644
index 00000000..72039c46
Binary files /dev/null and b/docs/baseline-shift-dark.png differ
diff --git a/docs/baseline-shift-light.png b/docs/baseline-shift-light.png
new file mode 100644
index 00000000..5bd08493
Binary files /dev/null and b/docs/baseline-shift-light.png differ
diff --git a/docs/baseline-shift.svg b/docs/baseline-shift.svg
new file mode 100644
index 00000000..3685f0fa
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+       cy="153.49341"
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+       ry="0.10498031" />
+    <ellipse
+       
style="fill:none;fill-opacity:0.28;stroke:#000000;stroke-width:0.18;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none"
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diff --git a/docs/meson.build b/docs/meson.build
index ac2a2257..2471f09e 100644
--- a/docs/meson.build
+++ b/docs/meson.build
@@ -42,6 +42,8 @@ pango_content_files = [
   'cursor-positions-dark.png',
   'glyphstring-positions-light.png',
   'glyphstring-positions-dark.png',
+  'baseline-shift-light.png',
+  'baseline-shift-dark.png',
 ]
 
 doc_conf = configuration_data()
diff --git a/docs/pango.toml.in b/docs/pango.toml.in
index 01173997..b3ca2bc6 100644
--- a/docs/pango.toml.in
+++ b/docs/pango.toml.in
@@ -100,4 +100,6 @@ content_images = [
   "cursor-positions-dark.png",
   "glyphstring-positions-light.png",
   "glyphstring-positions-dark.png",
+  "baseline-shift-light.png",
+  "baseline-shift-dark.png",
 ]
diff --git a/docs/pango_markup.md b/docs/pango_markup.md
index 287bbc56..c9561fdf 100644
--- a/docs/pango_markup.md
+++ b/docs/pango_markup.md
@@ -152,6 +152,16 @@ rise
   negative for subscript, positive for superscript.
   Support for specifying rise in points was added in Pango 1.50.
 
+baseline_shift
+: Vertical displacement. In contrast to rise, baseline_shift attributes are cumulative.
+  The value can be a length in Pango units or in points (e.g. '5pt'), or 'superscript'
+  or 'subscript'. Available since 1.50.
+
+font_scale:
+: Font size change. The possible values are 'superscript' or 'subscript'. This is
+  similar to the font_size values 'smaller' or 'larger', but uses font metrics to
+  find the new size. Available since 1.50.
+
 strikethrough
 : 'true' or 'false' whether to strike through the text.
 
diff --git a/pango/pango-attributes.c b/pango/pango-attributes.c
index 65af8f3b..a87c661e 100644
--- a/pango/pango-attributes.c
+++ b/pango/pango-attributes.c
@@ -931,9 +931,19 @@ pango_attr_rise_new (int rise)
  *
  * Create a new baseline displacement attribute.
  *
+ * The effect of this attribute is to shift the baseline of a run,
+ * relative to the run of preceding run.
+ *
+ * <picture>
+ *   <source srcset="baseline-shift-dark.png" media="(prefers-color-scheme: dark)">
+ *   <img alt="Baseline Shift" src="baseline-shift-light.png">
+ * </picture>
+
  * Return value: (transfer full): the newly allocated
  *   `PangoAttribute`, which should be freed with
  *   [method@Pango.Attribute.destroy]
+ *
+ * Since: 1.50
  */
 PangoAttribute *
 pango_attr_baseline_shift_new (int rise)
@@ -948,6 +958,23 @@ pango_attr_baseline_shift_new (int rise)
   return pango_attr_int_new (&klass, (int)rise);
 }
 
+/**
+ * pango_attr_font_scale_new:
+ * @scale: a `PangoFontScale` value, which indicates font size change relative
+ *   to the size of the previous run.
+ *
+ *
+ * Create a new font scale attribute.
+ *
+ * The effect of this attribute is to change the font size of a run,
+ * relative to the size of preceding run.
+ *
+ * Return value: (transfer full): the newly allocated
+ *   `PangoAttribute`, which should be freed with
+ *   [method@Pango.Attribute.destroy]
+ *
+ * Since: 1.50
+ */
 PangoAttribute *
 pango_attr_font_scale_new (PangoFontScale scale)
 {
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