Derive Default on enums (#61)

Author: reknih

src/annotations.rs

@@ -292,13 +292,14 @@ impl AnnotationType {
 }
 
 /// Possible icons for an annotation.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum AnnotationIcon<'a> {
     /// Speech bubble. For use with text annotations.
     Comment,
     /// For use with text annotations.
     Key,
     /// Sticky note. For use with text annotations.
+    #[default]
     Note,
     /// Question mark or manual. For use with text annotations.
     Help,
@@ -525,9 +526,10 @@ deref!('a, AppearanceCharacteristics<'a> => Dict<'a>, dict);
 
 /// The position the text of the widget annotation's caption relative to its
 /// icon.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum TextPosition {
     /// Hide icon, show only caption.
+    #[default]
     CaptionOnly = 0,
     /// Hide caption, show only icon.
     IconOnly = 1,
@@ -586,9 +588,10 @@ impl IconFit<'_> {
 deref!('a, IconFit<'a> => Dict<'a>, dict);
 
 /// How the icon in a push button field should be scaled.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum IconScale {
     /// Always scale the icon.
+    #[default]
     Always,
     /// Scale the icon only when the icon is bigger than the annotation
     /// rectangle.
@@ -612,7 +615,7 @@ impl IconScale {
 }
 
 /// How the icon in a push button field should be scaled.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum IconScaleType {
     /// Scale the icon to fill the annotation rectangle exactly, without regard
     /// to its original aspect ratio (ratio of width to height).
@@ -622,6 +625,7 @@ pub enum IconScaleType {
     /// horizontal and vertical scaling factors are different, use the smaller
     /// of the two, centering the icon within the annotation rectangle in the
     /// other dimension.
+    #[default]
     Proportional,
 }
 
@@ -636,11 +640,12 @@ impl IconScaleType {
 
 /// Highlighting effect applied when a user holds the mouse button over an
 /// annotation.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum HighlightEffect {
     /// No effect.
     None,
     /// Invert the colors inside of the annotation rect.
+    #[default]
     Invert,
     /// Invert the colors on the annotation border.
     Outline,

src/attributes.rs

@@ -224,9 +224,10 @@ impl Placement {
 }
 
 /// Writing direction.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum WritingMode {
     /// Horizontal writing mode, left-to-right.
+    #[default]
     LtrTtb,
     /// Horizontal writing mode, right-to-left.
     RtlTtb,
@@ -245,9 +246,10 @@ impl WritingMode {
 }
 
 /// Layout border style.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum LayoutBorderStyle {
     /// No border.
+    #[default]
     None,
     /// Hidden border.
     Hidden,
@@ -340,9 +342,10 @@ impl LayoutAttributes<'_> {
 }
 
 /// The text alignment.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum TextAlign {
     /// At the start of the inline advance direction.
+    #[default]
     Start,
     /// Centered.
     Center,
@@ -404,9 +407,10 @@ impl LayoutAttributes<'_> {
 }
 
 /// The block alignment.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum BlockAlign {
     /// At the start of the block advance direction.
+    #[default]
     Before,
     /// Centered.
     Middle,
@@ -449,9 +453,10 @@ impl LayoutAttributes<'_> {
 }
 
 /// The inline alignment.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum InlineAlign {
     /// At the start of the inline advance direction.
+    #[default]
     Start,
     /// Centered.
     Center,
@@ -513,10 +518,11 @@ impl LayoutAttributes<'_> {
 }
 
 /// The height of a line.
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, Default, PartialEq)]
 pub enum LineHeight {
     /// Adjust the line height automatically, taking `/BaselineShift` into
     /// account.
+    #[default]
     Normal,
     /// Adjust the line height automatically.
     Auto,
@@ -535,9 +541,10 @@ impl LineHeight {
 }
 
 /// Where the text is positioned relative to the baseline.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum LayoutTextPosition {
     /// At the baseline.
+    #[default]
     Normal,
     /// Above the baseline.
     Superscript,
@@ -556,9 +563,10 @@ impl LayoutTextPosition {
 }
 
 /// The text decoration type (over- and underlines).
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum TextDecorationType {
     /// No decoration.
+    #[default]
     None,
     /// Underlined.
     Underline,
@@ -605,7 +613,7 @@ impl LayoutAttributes<'_> {
 }
 
 /// The alignment of a ruby annotation.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum RubyAlign {
     /// At the start of the inline advance direction.
     Start,
@@ -616,6 +624,7 @@ pub enum RubyAlign {
     /// Justified.
     Justify,
     /// Distribute along the full width of the line with additional space.
+    #[default]
     Distribute,
 }
 
@@ -632,9 +641,10 @@ impl RubyAlign {
 }
 
 /// The position of a ruby annotation.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum RubyPosition {
     /// Before edge of the element.
+    #[default]
     Before,
     /// After edge of the element.
     After,
@@ -700,9 +710,10 @@ impl<'a> ListAttributes<'a> {
 deref!('a, ListAttributes<'a> => Dict<'a>, dict);
 
 /// The list numbering type.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum ListNumbering {
     /// No numbering.
+    #[default]
     None,
     /// An unordered list with unspecified bullets. PDF 2.0+.
     Unordered,
@@ -817,9 +828,10 @@ impl FieldRole {
 }
 
 /// Whether a check box or radio button is checked.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum FieldState {
     /// The check box or radio button is unchecked.
+    #[default]
     Unchecked,
     /// The check box or radio button is checked.
     Checked,

src/content.rs

@@ -222,11 +222,12 @@ impl LineJoinStyle {
     }
 }
 /// How the output device should aim to render colors.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum RenderingIntent {
     /// Only consider the light source, not the output's white point.
     AbsoluteColorimetric,
     /// Consider both the light source and the output's white point.
+    #[default]
     RelativeColorimetric,
     /// Preserve saturation.
     Saturation,
@@ -502,9 +503,10 @@ impl Content {
 }
 
 /// How to render text.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum TextRenderingMode {
     /// Just fill the text.
+    #[default]
     Fill,
     /// Just stroke the text.
     Stroke,
@@ -1528,9 +1530,10 @@ impl ExtGraphicsState<'_> {
 deref!('a, ExtGraphicsState<'a> => Dict<'a>, dict);
 
 /// How to blend source and backdrop.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 #[allow(missing_docs)]
 pub enum BlendMode {
+    #[default]
     Normal,
     Multiply,
     Screen,
@@ -1573,10 +1576,11 @@ impl BlendMode {
 }
 
 /// How to behave when overprinting for colorants with the value zero.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum OverprintMode {
     /// An overprint operation will always discard the underlying color, even if
     /// one of the colorants is zero.
+    #[default]
     OverrideAllColorants,
     /// An overprint operation will only discard the underlying colorant
     /// component (e.g. cyan in CMYK) if the new corresponding colorant is

src/files.rs

@@ -161,7 +161,7 @@ deref!('a, EmbeddingParams<'a> => Dict<'a>, dict);
 
 /// How an embedded file relates to the PDF document it is embedded in.
 /// PDF 1.7 with PDF/A-3, PDF 2.0+ (including PDF/A-4f).
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum AssociationKind {
     /// The PDF document was created from this source file.
     Source,
@@ -178,6 +178,7 @@ pub enum AssociationKind {
     /// A machine-readable schema. PDF 2.0+.
     Schema,
     /// There is no clear relationship or it is not known.
+    #[default]
     Unspecified,
 }
 

src/font.rs

@@ -830,9 +830,10 @@ impl<'a> Cmap<'a> {
 deref!('a, Cmap<'a> => Stream<'a>, stream);
 
 /// The writing mode of a character map.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 #[allow(missing_docs)]
 pub enum WMode {
+    #[default]
     Horizontal,
     Vertical,
 }

src/forms.rs

@@ -339,9 +339,10 @@ impl Field<'_> {
 }
 
 /// The quadding (justification) of a field containing variable text.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum Quadding {
     /// Left justify the text.
+    #[default]
     Left = 0,
     /// Center justify the text.
     Center = 1,

src/functions.rs

@@ -104,9 +104,10 @@ deref!('a, SampledFunction<'a> => Stream<'a>, stream);
 
 /// How to interpolate between the samples in a function of the
 /// sampled type.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum InterpolationOrder {
     /// Linear spline interpolation.
+    #[default]
     Linear,
     /// Cubic spline interpolation.
     Cubic,

src/object.rs

@@ -1102,10 +1102,11 @@ impl DecodeParms<'_> {
 deref!('a, DecodeParms<'a> => Dict<'a>, dict);
 
 /// Which kind of predictor to use for a `FlateDecode` or `LzwDecode` stream.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 #[allow(missing_docs)]
 pub enum Predictor {
     /// No prediction.
+    #[default]
     None,
     /// TIFF Predictor 2.
     Tiff,

src/renditions.rs

@@ -173,9 +173,10 @@ deref!('a, MediaPermissions<'a> => Dict<'a>, dict);
 
 /// The circumstances under which it is acceptable to write a temporary file in
 /// order to play a media clip.
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Default, Eq, PartialEq, Hash)]
 pub enum TempFileType {
     /// Never allowed.
+    #[default]
     Never,
     /// Allowed only if the document permissions allow content extraction.
     Extract,