1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118

// Copyright 2013-2017, The Gtk-rs Project Developers.
// See the COPYRIGHT file at the top-level directory of this distribution.
// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>

extern crate glib;
extern crate javascriptcore_sys;

use std::ptr;

use glib::translate::{FromGlibPtrFull, FromGlibPtrNone};
use javascriptcore_sys::*;

pub struct GlobalContext {
    raw: JSGlobalContextRef,
}

pub struct Value {
    raw: JSValueRef,
}

impl Value {
    pub fn is_boolean(&self, context: &GlobalContext) -> bool {
        unsafe { JSValueIsBoolean(context.raw, self.raw) != 0 }
    }

    pub fn is_null(&self, context: &GlobalContext) -> bool {
        unsafe { JSValueIsNull(context.raw, self.raw) != 0 }
    }

    pub fn is_undefined(&self, context: &GlobalContext) -> bool {
        unsafe { JSValueIsUndefined(context.raw, self.raw) != 0 }
    }

    pub fn is_number(&self, context: &GlobalContext) -> bool {
        unsafe { JSValueIsNumber(context.raw, self.raw) != 0 }
    }

    pub fn is_string(&self, context: &GlobalContext) -> bool {
        unsafe { JSValueIsString(context.raw, self.raw) != 0 }
    }

    pub fn is_object(&self, context: &GlobalContext) -> bool {
        unsafe { JSValueIsObject(context.raw, self.raw) != 0 }
    }

    pub fn is_array(&self, context: &GlobalContext) -> bool {
        unsafe { JSValueIsArray(context.raw, self.raw) != 0 }
    }

    pub fn is_date(&self, context: &GlobalContext) -> bool {
        unsafe { JSValueIsDate(context.raw, self.raw) != 0 }
    }

    pub fn to_number(&self, context: &GlobalContext) -> Option<f64> {
        let mut exception = ptr::null_mut();
        let result = unsafe { JSValueToNumber(context.raw, self.raw, &mut exception) };
        if exception.is_null() {
            Some(result)
        } else {
            None
        }
    }

    pub fn to_boolean(&self, context: &GlobalContext) -> bool {
        let value = unsafe { JSValueToBoolean(context.raw, self.raw) };
        value != 0
    }

    pub fn to_string(&self, context: &GlobalContext) -> Option<String> {
        unsafe {
            let mut exception = ptr::null_mut();
            let jsstring = JSValueToStringCopy(context.raw, self.raw, &mut exception);

            if exception.is_null() {
                let cap = JSStringGetMaximumUTF8CStringSize(jsstring);
                let mut buf = Vec::<u8>::with_capacity(cap);
                let len = JSStringGetUTF8CString(jsstring, buf.as_mut_ptr() as _, cap);
                JSStringRelease(jsstring);
                buf.set_len(len - 1);
                String::from_utf8(buf).ok()
            } else {
                None
            }
        }
    }
}

impl FromGlibPtrNone<JSValueRef> for Value {
    unsafe fn from_glib_none(ptr: JSValueRef) -> Self {
        Value {
            raw: ptr,
        }
    }
}

impl FromGlibPtrFull<JSValueRef> for Value {
    unsafe fn from_glib_full(ptr: JSValueRef) -> Self {
        Value {
            raw: ptr,
        }
    }
}

impl FromGlibPtrNone<JSGlobalContextRef> for GlobalContext {
    unsafe fn from_glib_none(ptr: JSValueRef) -> Self {
        GlobalContext {
            raw: ptr,
        }
    }
}

impl FromGlibPtrFull<JSGlobalContextRef> for GlobalContext {
    unsafe fn from_glib_full(ptr: JSValueRef) -> Self {
        GlobalContext {
            raw: ptr,
        }
    }
}