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stylo: Implement support for the contents property.
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commit
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3 changed files with 120 additions and 4 deletions
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@ -1355,6 +1355,93 @@ fn static_assert() {
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${impl_coord_copy('column_width', 'mColumnWidth')}
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</%self:impl_trait>
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<%self:impl_trait style_struct_name="Counters"
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skip_longhands="content">
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pub fn set_content(&mut self, v: longhands::content::computed_value::T) {
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use properties::longhands::content::computed_value::T;
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use properties::longhands::content::computed_value::ContentItem;
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use gecko_bindings::structs::nsStyleContentData;
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use gecko_bindings::structs::nsStyleContentType::*;
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use gecko_bindings::bindings::Gecko_ClearStyleContents;
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// Converts a string as utf16, and returns an owned, zero-terminated raw buffer.
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fn as_utf16_and_forget(s: &str) -> *mut u16 {
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use std::mem;
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let mut vec = s.encode_utf16().collect::<Vec<_>>();
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vec.push(0u16);
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let ptr = vec.as_mut_ptr();
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mem::forget(vec);
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ptr
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}
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#[inline(always)]
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#[cfg(debug_assertions)]
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fn set_image_tracked(contents: &mut nsStyleContentData, val: bool) {
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contents.mImageTracked = val;
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}
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#[inline(always)]
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#[cfg(not(debug_assertions))]
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fn set_image_tracked(_contents: &mut nsStyleContentData, _val: bool) {}
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// Ensure destructors run, otherwise we could leak.
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if !self.gecko.mContents.is_empty() {
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unsafe {
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Gecko_ClearStyleContents(&mut self.gecko);
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}
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}
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match v {
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T::none |
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T::normal => {}, // Do nothing, already cleared.
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T::Content(items) => {
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// NB: set_len also reserves the appropriate space.
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unsafe { self.gecko.mContents.set_len(items.len() as u32) }
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for (i, item) in items.into_iter().enumerate() {
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// TODO: Servo lacks support for attr(), and URIs,
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// We don't support images, but need to remember to
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// explicitly initialize mImageTracked in debug builds.
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set_image_tracked(&mut self.gecko.mContents[i], false);
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// NB: Gecko compares the mString value if type is not image
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// or URI independently of whatever gets there. In the quote
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// cases, they set it to null, so do the same here.
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unsafe {
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*self.gecko.mContents[i].mContent.mString.as_mut() = ptr::null_mut();
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}
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match item {
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ContentItem::String(value) => {
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self.gecko.mContents[i].mType = eStyleContentType_String;
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unsafe {
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// NB: we share allocators, so doing this is fine.
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*self.gecko.mContents[i].mContent.mString.as_mut() =
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as_utf16_and_forget(&value);
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}
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}
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ContentItem::OpenQuote
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=> self.gecko.mContents[i].mType = eStyleContentType_OpenQuote,
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ContentItem::CloseQuote
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=> self.gecko.mContents[i].mType = eStyleContentType_CloseQuote,
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ContentItem::NoOpenQuote
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=> self.gecko.mContents[i].mType = eStyleContentType_NoOpenQuote,
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ContentItem::NoCloseQuote
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=> self.gecko.mContents[i].mType = eStyleContentType_NoCloseQuote,
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ContentItem::Counter(..) |
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ContentItem::Counters(..)
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=> self.gecko.mContents[i].mType = eStyleContentType_Uninitialized,
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}
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}
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}
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}
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}
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pub fn copy_content_from(&mut self, other: &Self) {
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use gecko_bindings::bindings::Gecko_CopyStyleContentsFrom;
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unsafe {
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Gecko_CopyStyleContentsFrom(&mut self.gecko, &other.gecko)
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}
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}
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</%self:impl_trait>
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<%def name="define_ffi_struct_accessor(style_struct)">
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#[no_mangle]
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#[allow(non_snake_case, unused_variables)]
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