skia_safe/modules/paragraph/
paragraph_builder.rs

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("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}
skia_safe/modules/paragraph/paragraph_builder.rs

skia_safe/modules/paragraph/
paragraph_builder.rs
