1use std::{fmt, os::raw, ptr, str};
2
3use skia_bindings as sb;
4
5use super::{FontCollection, Paragraph, ParagraphStyle, PlaceholderStyle, TextStyle};
6use crate::prelude::*;
7
8pub type ParagraphBuilder = RefHandle<sb::skia_textlayout_ParagraphBuilder>;
9unsafe_send_sync!(ParagraphBuilder);
10
11impl NativeDrop for sb::skia_textlayout_ParagraphBuilder {
12 fn drop(&mut self) {
13 unsafe { sb::C_ParagraphBuilder_delete(self) }
14 }
15}
16
17impl fmt::Debug for ParagraphBuilder {
18 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
19 f.debug_struct(name:"ParagraphBuilder").finish()
20 }
21}
22
23impl ParagraphBuilder {
24 pub fn push_style(&mut self, style: &TextStyle) -> &mut Self {
25 unsafe { sb::C_ParagraphBuilder_pushStyle(self.native_mut(), style.native()) }
26 self
27 }
28
29 pub fn pop(&mut self) -> &mut Self {
30 unsafe { sb::C_ParagraphBuilder_pop(self.native_mut()) }
31 self
32 }
33
34 pub fn peek_style(&mut self) -> TextStyle {
35 let mut ts = TextStyle::default();
36 unsafe { sb::C_ParagraphBuilder_peekStyle(self.native_mut(), ts.native_mut()) }
37 ts
38 }
39
40 pub fn add_text(&mut self, str: impl AsRef<str>) -> &mut Self {
41 let str = str.as_ref();
42 unsafe {
43 sb::C_ParagraphBuilder_addText(
44 self.native_mut(),
45 str.as_ptr() as *const raw::c_char,
46 str.len(),
47 )
48 }
49 self
50 }
51
52 pub fn add_placeholder(&mut self, placeholder_style: &PlaceholderStyle) -> &mut Self {
53 unsafe {
54 sb::C_ParagraphBuilder_addPlaceholder(self.native_mut(), placeholder_style.native())
55 }
56 self
57 }
58
59 pub fn build(&mut self) -> Paragraph {
60 Paragraph::from_ptr(unsafe { sb::C_ParagraphBuilder_Build(self.native_mut()) }).unwrap()
61 }
62
63 pub fn get_text(&mut self) -> &str {
64 unsafe {
65 let mut ptr = ptr::null_mut();
66 let mut len = 0;
67 sb::C_ParagraphBuilder_getText(self.native_mut(), &mut ptr, &mut len);
68 // ptr may indeed be `null` if there is no text.
69 str::from_utf8_unchecked(safer::from_raw_parts(ptr as *const u8, len))
70 }
71 }
72
73 pub fn get_paragraph_style(&self) -> ParagraphStyle {
74 ParagraphStyle::from_ptr(unsafe { sb::C_ParagraphBuilder_getParagraphStyle(self.native()) })
75 .unwrap()
76 }
77
78 // TODO: Wrap SetWords*, SetGraphemeBreaks*, setLineBreaks*, getClientICUData, setUnicode.
79
80 pub fn reset(&mut self) {
81 unsafe { sb::C_ParagraphBuilder_Reset(self.native_mut()) }
82 }
83
84 pub fn new(style: &ParagraphStyle, font_collection: impl Into<FontCollection>) -> Self {
85 #[cfg(feature = "embed-icudtl")]
86 crate::icu::init();
87
88 Self::from_ptr(unsafe {
89 sb::C_ParagraphBuilder_make(style.native(), font_collection.into().into_ptr())
90 })
91 .expect("Unicode initialization error")
92 }
93}
94