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use cairo;
use cairo_sys;
use glib::translate::*;
use libc;
use regex::{Captures, Regex};
use std::borrow::Cow;
use std::cell::RefCell;
use attributes::Attribute;
use drawing_ctx::{self, RsvgDrawingCtx};
use handle::RsvgHandle;
use node::*;
use property_bag::PropertyBag;
struct NodeLink {
link: RefCell<Option<String>>,
}
impl NodeLink {
fn new() -> NodeLink {
NodeLink {
link: RefCell::new(None),
}
}
}
impl NodeTrait for NodeLink {
fn set_atts(&self, _: &RsvgNode, _: *const RsvgHandle, pbag: &PropertyBag) -> NodeResult {
for (_key, attr, value) in pbag.iter() {
match attr {
Attribute::XlinkHref => *self.link.borrow_mut() = Some(value.to_owned()),
_ => (),
}
}
Ok(())
}
fn draw(
&self,
node: &RsvgNode,
cascaded: &CascadedValues,
draw_ctx: *mut RsvgDrawingCtx,
dominate: i32,
clipping: bool,
) {
let link = self.link.borrow();
if link.is_some() && link.as_ref().unwrap() != "" {
const CAIRO_TAG_LINK: &str = "Link";
let attributes = link.as_ref().map(|i| format!("uri='{}'", escape_value(i)));
drawing_ctx::get_cairo_context(draw_ctx).with_tag(
CAIRO_TAG_LINK,
attributes.as_ref().map(|i| i.as_str()),
|| {
node.draw_children(
&CascadedValues::new(cascaded, node),
draw_ctx,
dominate,
clipping,
)
},
)
} else {
node.draw_children(
&CascadedValues::new(cascaded, node),
draw_ctx,
dominate,
clipping,
)
}
}
fn get_c_impl(&self) -> *const RsvgCNodeImpl {
unreachable!();
}
}
/// escape quotes and backslashes with backslash
fn escape_value(value: &str) -> Cow<str> {
lazy_static! {
static ref REGEX: Regex = Regex::new(r"['\\]").unwrap();
}
REGEX.replace_all(value, |caps: &Captures| {
match caps.get(0).unwrap().as_str() {
"'" => "\\'".to_owned(),
"\\" => "\\\\".to_owned(),
_ => unreachable!(),
}
})
}
extern "C" {
fn cairo_tag_begin(
cr: *mut cairo_sys::cairo_t,
tag_name: *const libc::c_char,
attibutes: *const libc::c_char,
);
fn cairo_tag_end(cr: *mut cairo_sys::cairo_t, tag_name: *const libc::c_char);
}
/// Bindings that aren't supported by `cairo-rs` for now
trait CairoTagging {
fn tag_begin(&self, tag_name: &str, attributes: Option<&str>);
fn tag_end(&self, tag_name: &str);
fn with_tag<U, T>(&self, tag_name: &str, attributes: Option<&str>, f: U) -> T
where
U: Fn() -> T,
{
self.tag_begin(tag_name, attributes);
let result = f();
self.tag_end(tag_name);
result
}
}
impl CairoTagging for cairo::Context {
fn tag_begin(&self, tag_name: &str, attributes: Option<&str>) {
unsafe {
cairo_tag_begin(
self.to_glib_none().0,
tag_name.to_glib_none().0,
attributes.to_glib_none().0,
);
}
}
fn tag_end(&self, tag_name: &str) {
unsafe {
cairo_tag_end(self.to_glib_none().0, tag_name.to_glib_none().0);
}
}
}
// ****************** C Prototypes ******************
#[no_mangle]
pub extern "C" fn rsvg_node_link_new(
_: *const libc::c_char,
raw_parent: *const RsvgNode,
) -> *const RsvgNode {
boxed_node_new(NodeType::Link, raw_parent, Box::new(NodeLink::new()))
}
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