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// This Source Code Form is subject to the terms of the Mozilla Public // License, v. 2.0. If a copy of the MPL was not distributed with this // file, You can obtain one at http://mozilla.org/MPL/2.0/. use std::path::PathBuf; // self use geom::*; use super::attribute::*; // TODO: use Box for large types /// Node's kind. #[allow(missing_docs)] pub enum NodeKind { Svg(Svg), Defs, LinearGradient(LinearGradient), RadialGradient(RadialGradient), Stop(Stop), ClipPath(ClipPath), Mask(Mask), Pattern(Pattern), Path(Path), Text(Text), TextChunk(TextChunk), TSpan(TSpan), Image(Image), Group(Group), } impl NodeKind { /// Returns node's ID. /// /// If a current node doesn't support ID - an empty string /// will be returned. pub fn id(&self) -> &str { match *self { NodeKind::Svg(_) => "", NodeKind::Defs => "", NodeKind::LinearGradient(ref e) => e.id.as_str(), NodeKind::RadialGradient(ref e) => e.id.as_str(), NodeKind::Stop(_) => "", NodeKind::ClipPath(ref e) => e.id.as_str(), NodeKind::Mask(ref e) => e.id.as_str(), NodeKind::Pattern(ref e) => e.id.as_str(), NodeKind::Path(ref e) => e.id.as_str(), NodeKind::Text(ref e) => e.id.as_str(), NodeKind::TextChunk(_) => "", NodeKind::TSpan(_) => "", NodeKind::Image(ref e) => e.id.as_str(), NodeKind::Group(ref e) => e.id.as_str(), } } /// Returns node's transform. /// /// If a current node doesn't support transformation - a default /// transform will be returned. pub fn transform(&self) -> Transform { match *self { NodeKind::Svg(_) => Transform::default(), NodeKind::Defs => Transform::default(), NodeKind::LinearGradient(ref e) => e.d.transform, NodeKind::RadialGradient(ref e) => e.d.transform, NodeKind::Stop(_) => Transform::default(), NodeKind::ClipPath(ref e) => e.transform, NodeKind::Mask(_) => Transform::default(), NodeKind::Pattern(ref e) => e.transform, NodeKind::Path(ref e) => e.transform, NodeKind::Text(ref e) => e.transform, NodeKind::TextChunk(_) => Transform::default(), NodeKind::TSpan(_) => Transform::default(), NodeKind::Image(ref e) => e.transform, NodeKind::Group(ref e) => e.transform, } } } /// An SVG root element. #[derive(Clone, Copy, Debug)] pub struct Svg { /// Image size. /// /// Size of an image that should be created to fit the SVG. /// /// `width` and `height` in the SVG. pub size: Size, /// SVG viewbox. /// /// Specifies which part of the SVG image should be rendered. /// /// `viewBox` and `preserveAspectRatio` in the SVG. pub view_box: ViewBox, } /// A path element. #[derive(Clone)] pub struct Path { /// Element's ID. /// /// Taken from the SVG itself. /// Isn't automatically generated. /// Can be empty. pub id: String, /// Element transform. pub transform: Transform, /// Fill style. pub fill: Option<Fill>, /// Stroke style. pub stroke: Option<Stroke>, /// Segments list. /// /// All segments are in absolute coordinates. pub segments: Vec<PathSegment>, } /// A text element. /// /// `text` element in the SVG. pub struct Text { /// Element's ID. /// /// Taken from the SVG itself. /// Isn't automatically generated. /// Can be empty. pub id: String, /// Element transform. pub transform: Transform, } /// A text chunk. /// /// Contains position and anchor of the next /// [text chunk](https://www.w3.org/TR/SVG11/text.html#TextChunk). /// /// Doesn't represented in the SVG directly. Usually, it's a first `tspan` or text node /// and any `tspan` that defines either `x` or `y` coordinate and/or have `text-anchor`. #[derive(Clone, Copy)] pub struct TextChunk { /// An absolute position on the X-axis. pub x: f64, /// An absolute position on the Y-axis. pub y: f64, /// A text anchor/align. pub anchor: TextAnchor, } // TODO: dx, dy /// A text span. /// /// `tspan` element in the SVG. #[derive(Clone)] pub struct TSpan { /// Fill style. pub fill: Option<Fill>, /// Stroke style. pub stroke: Option<Stroke>, /// Font description. pub font: Font, /// Text decoration. /// /// Unlike `text-decoration` attribute from the SVG, this one has all styles resolved. /// Basically, by the SVG `text-decoration` attribute can be defined on `tspan` element /// and on any parent element. And all definitions should be combined. /// The one that was defined by `tspan` uses the `tspan` style itself. /// The one that was defined by any parent node uses the `text` element style. /// So it's pretty hard to resolve. /// /// This property has all this stuff resolved. pub decoration: TextDecoration, /// An actual text line. /// /// SVG doesn't support multiline text, so this property doesn't have a new line inside of it. /// All the spaces are already trimmed or preserved, depending on the `xml:space` attribute. /// All characters references are already resolved, so there is no `>` or `P`. /// So this text should be rendered as is, without any postprocessing. pub text: String, } /// A raster image element. /// /// `image` element in the SVG. pub struct Image { /// Element's ID. /// /// Taken from the SVG itself. /// Isn't automatically generated. /// Can be empty. pub id: String, /// Element transform. pub transform: Transform, /// An image rectangle in which it should be fit. /// /// Combination of the `x`, `y`, `width`, `height` and `preserveAspectRatio` /// attributes. pub view_box: ViewBox, /// Image data. pub data: ImageData, } /// A raster image container. pub enum ImageData { /// Path to the image. /// /// Preprocessor checks that file exists, but because it can be removed later, /// there is no guarantee that this path is valid. Path(PathBuf), /// An image raw data. /// /// It's not a decoded image data, but the data that was decoded from base64. /// So you still need a PNG and a JPEG decoding library. Raw(Vec<u8>, ImageDataKind), } /// An image codec. #[allow(missing_docs)] #[derive(Clone, Copy, PartialEq)] pub enum ImageDataKind { PNG, JPEG, } /// A group container. /// /// The preprocessor will remove all groups that don't impact rendering. /// Those that left is just an indicator that a new canvas should be created. /// /// `g` element in the SVG. pub struct Group { /// Element's ID. /// /// Taken from the SVG itself. /// Isn't automatically generated. /// Can be empty. pub id: String, /// Element transform. pub transform: Transform, /// Group opacity. /// /// After the group is rendered we should combine /// it with a parent group using the specified opacity. pub opacity: Option<Opacity>, /// Element clip path. pub clip_path: Option<String>, /// Element mask. pub mask: Option<String>, } /// A generic gradient. #[derive(Clone, Copy)] pub struct BaseGradient { /// Coordinate system units. /// /// `gradientUnits` in the SVG. pub units: Units, /// Gradient transform. /// /// `gradientTransform` in the SVG. pub transform: Transform, /// Gradient spreading method. /// /// `spreadMethod` in the SVG. pub spread_method: SpreadMethod, } /// A linear gradient. /// /// `linearGradient` element in the SVG. #[allow(missing_docs)] pub struct LinearGradient { /// Element's ID. /// /// Taken from the SVG itself. /// Can't be empty. pub id: String, pub x1: f64, pub y1: f64, pub x2: f64, pub y2: f64, /// Base gradient data. pub d: BaseGradient, } /// A radial gradient. /// /// `radialGradient` element in the SVG. #[allow(missing_docs)] pub struct RadialGradient { /// Element's ID. /// /// Taken from the SVG itself. /// Can't be empty. pub id: String, pub cx: f64, pub cy: f64, pub r: f64, pub fx: f64, pub fy: f64, /// Base gradient data. pub d: BaseGradient, } /// Gradient's stop element. /// /// `stop` element in the SVG. #[derive(Clone, Copy)] #[allow(missing_docs)] pub struct Stop { pub offset: StopOffset, pub color: Color, pub opacity: Opacity, } /// A clip-path element. /// /// `clipPath` element in the SVG. pub struct ClipPath { /// Element's ID. /// /// Taken from the SVG itself. /// Can't be empty. pub id: String, /// Coordinate system units. /// /// `clipPathUnits` in the SVG. pub units: Units, /// Clip path transform. /// /// `transform` in the SVG. pub transform: Transform, } /// A mask element. /// /// `mask` element in the SVG. pub struct Mask { /// Element's ID. /// /// Taken from the SVG itself. /// Can't be empty. pub id: String, /// Coordinate system units. /// /// `maskUnits` in the SVG. pub units: Units, /// Content coordinate system units. /// /// `maskContentUnits` in the SVG. pub content_units: Units, /// Pattern rectangle. /// /// `x`, `y`, `width` and `height` in the SVG. pub rect: Rect, } /// A pattern element. /// /// `pattern` element in the SVG. pub struct Pattern { /// Element's ID. /// /// Taken from the SVG itself. /// Can't be empty. pub id: String, /// Coordinate system units. /// /// `patternUnits` in the SVG. pub units: Units, // TODO: should not be accessible when `viewBox` is present. /// Content coordinate system units. /// /// `patternContentUnits` in the SVG. pub content_units: Units, /// Pattern transform. /// /// `patternTransform` in the SVG. pub transform: Transform, /// Pattern rectangle. /// /// `x`, `y`, `width` and `height` in the SVG. pub rect: Rect, /// Pattern viewbox. pub view_box: Option<ViewBox>, }