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use xml::writer::{EmitterConfig, XmlEvent, EventWriter};
use crate::point::{Point, Vec2DWorld};
use crate::draw_commands::DrawCommand;
use crate::app::Pizarra;
impl DrawCommand {
fn serialize(self, writer: &mut EventWriter<&mut Vec<u8>>) {
match self {
DrawCommand::Path {
color, commands, thickness,
} => {
let d: String = commands.iter().map(|p| p.to_string()).collect();
writer.write(XmlEvent::start_element("path")
.attr("style", &format!(
"fill:none;stroke-width:{stroke};stroke-linecap:round;stroke-linejoin:round;stroke:{color};stroke-opacity:{alpha};stroke-miterlimit:10;",
stroke = thickness,
color = color.css(),
alpha = color.alpha(),
))
.attr("d", &d)).unwrap();
writer.write(XmlEvent::end_element()).unwrap();
},
DrawCommand::Circle {
color, thickness, center, radius,
} => {
writer.write(XmlEvent::start_element("ellipse")
.attr("cx", ¢er.x.to_string())
.attr("cy", ¢er.y.to_string())
.attr("rx", &radius.to_string())
.attr("ry", &radius.to_string())
.attr("style", &format!(
"fill:none;stroke-width:{stroke};stroke:{color};stroke-opacity:{alpha};stroke-miterlimit:10",
stroke = thickness,
color = color.css(),
alpha = color.alpha(),
))
).unwrap();
writer.write(XmlEvent::end_element()).unwrap();
},
DrawCommand::Ellipse {
thickness, color, center, semimajor, semiminor, angle,
} => {
writer.write(XmlEvent::start_element("ellipse")
.attr("cx", ¢er.x.to_string())
.attr("cy", ¢er.y.to_string())
.attr("rx", &semimajor.to_string())
.attr("ry", &semiminor.to_string())
.attr("transform", &format!(
"rotate({angle} {x} {y})",
angle = angle.degrees(),
x = center.x,
y = center.y,
))
.attr("style", &format!("\
fill:none;\
stroke-width:{stroke};\
stroke:{color};\
stroke-opacity:{alpha};\
stroke-miterlimit:10;",
stroke = thickness,
color = color.css(),
alpha = color.alpha(),
))
).unwrap();
writer.write(XmlEvent::end_element()).unwrap();
},
}
}
}
impl Pizarra {
pub fn to_svg(&self) -> Option<String> {
if let Some(bbox) = self.get_bounds() {
let mut output = Vec::new();
let mut writer = EmitterConfig::new()
.perform_indent(true)
.create_writer(&mut output);
let export_padding = self.config().export_padding;
let svg_dimensions = (bbox[0] - bbox[1]).abs() + Vec2DWorld::new(export_padding*2.0, export_padding*2.0);
let width = svg_dimensions.x.to_string();
let height = svg_dimensions.y.to_string();
let min = bbox[0].min(bbox[1]);
let min_x = (min.x - export_padding).to_string();
let min_y = (min.y - export_padding).to_string();
let view_box = format!("{} {} {} {}", &min_x, &min_y, width, height);
let background_style = format!("fill:{fill};fill-opacity:1;stroke:none;", fill = self.bgcolor().css());
writer.write(XmlEvent::start_element("svg")
.ns("", "http://www.w3.org/2000/svg")
.attr("width", &width)
.attr("height", &height)
.attr("viewBox", &view_box)
.attr("version", "1.1")).unwrap();
writer.write(XmlEvent::start_element("g")
.attr("id", "storage")).unwrap();
writer.write(XmlEvent::start_element("rect")
.attr("x", &min_x)
.attr("y", &min_y)
.attr("width", &width)
.attr("height", &height)
.attr("style", &background_style)).unwrap();
writer.write(XmlEvent::end_element()).unwrap();
for command in self.draw_commands_for_drawing() {
command.serialize(&mut writer);
}
writer.write(XmlEvent::end_element()).unwrap();
writer.write(XmlEvent::end_element()).unwrap();
output.push(b'\n');
Some(String::from_utf8(output).unwrap())
} else {
None
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::color::Color;
use crate::point::Vec2DScreen;
use crate::app::{Pizarra, MouseButton, SelectedTool};
use crate::shape::ShapeTool;
#[test]
fn test_serialize() {
let mut app = Pizarra::new_for_testing();
app.resize(Vec2DScreen::new(40.0, 40.0));
app.set_tool(SelectedTool::Shape(ShapeTool::Path));
app.set_color(Color::red());
app.set_stroke(3.5);
app.handle_mouse_button_pressed(MouseButton::Left, Vec2DScreen::new(20.0, 20.0));
app.handle_mouse_button_released(MouseButton::Left, Vec2DScreen::new(21.0, 20.0));
assert_eq!(app.to_svg().unwrap(), include_str!("../res/serialize_test.svg"));
}
#[test]
fn serialize_ellipse() {
let mut app = Pizarra::new_for_testing();
app.resize(Vec2DScreen::new(40.0, 40.0));
app.set_tool(SelectedTool::Shape(ShapeTool::ThreePointEllipse));
app.set_color(Color::red());
app.set_stroke(3.5);
let a: Vec2DScreen = (-5.61146,3.80508).into();
let c: Vec2DScreen = (-0.44,-1.28).into();
let e: Vec2DScreen = (4.3,-0.4).into();
app.handle_mouse_button_pressed(MouseButton::Left, a);
app.handle_mouse_button_released(MouseButton::Left, a);
app.handle_mouse_move(c);
app.handle_mouse_button_released(MouseButton::Left, c);
app.handle_mouse_move(e);
app.handle_mouse_button_released(MouseButton::Left, e);
assert_eq!(app.to_svg().unwrap(), include_str!("../res/serialize_ellipse.svg"));
}
#[test]
fn test_serialize_color_with_alpha() {
let mut app = Pizarra::new_for_testing();
app.resize(Vec2DScreen::new(40.0, 40.0));
app.set_tool(SelectedTool::Shape(ShapeTool::Polygon));
app.set_color(Color::green());
app.set_alpha(0.5);
app.handle_mouse_button_pressed(MouseButton::Left, Vec2DScreen::new(10.0, 10.0));
app.handle_mouse_button_released(MouseButton::Left, Vec2DScreen::new(30.0, 30.0));
app.handle_mouse_button_released(MouseButton::Left, Vec2DScreen::new(30.0, 30.0));
assert_eq!(app.to_svg().unwrap(), include_str!("../res/serialize_alpha.svg"));
}
}