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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

use nom::{le_u16 as parse_le_u16, le_u8 as parse_u8};
use nom::IResult as NomResult;
use crate::parsers::basic_data_types::{parse_color_transform_with_alpha, parse_matrix};
use crate::parsers::display::{parse_blend_mode, parse_filter_list};
use swf_tree as ast;

#[derive(PartialEq, Eq, Clone, Copy, Ord, PartialOrd)]
pub enum ButtonVersion {
  Button1,
  Button2,
}

pub fn parse_button_record_string(input: &[u8], version: ButtonVersion) -> NomResult<&[u8], Vec<ast::ButtonRecord>> {
  let mut result: Vec<ast::ButtonRecord> = Vec::new();
  let mut current_input: &[u8] = input;
  loop {
    if current_input.len() == 0 {
      return Err(::nom::Err::Incomplete(::nom::Needed::Unknown));
    }
    if current_input[0] == 0 {
      // End of string
      current_input = &current_input[1..];
      break;
    }
    match parse_button_record(current_input, version) {
      Ok((next_input, button_record)) => {
        current_input = next_input;
        result.push(button_record);
      }
      Err(::nom::Err::Incomplete(_)) => return Err(::nom::Err::Incomplete(::nom::Needed::Unknown)),
      Err(e) => return Err(e),
    };
  }
  Ok((current_input, result))
}

pub fn parse_button_record(input: &[u8], version: ButtonVersion) -> NomResult<&[u8], ast::ButtonRecord> {
  do_parse!(
    input,
    flags: parse_u8 >>
    state_up: value!((flags & (1 << 0)) != 0) >>
    state_over: value!((flags & (1 << 1)) != 0) >>
    state_down: value!((flags & (1 << 2)) != 0) >>
    state_hit_test: value!((flags & (1 << 3)) != 0) >>
    has_filter_list: value!((flags & (1 << 4)) != 0) >>
    has_blend_mode: value!((flags & (1 << 5)) != 0) >>
    // (Skip bits [6, 7])
    character_id: parse_le_u16 >>
    depth: parse_le_u16 >>
    matrix: parse_matrix >>
    color_transform: cond!(
      version >= ButtonVersion::Button2,
      parse_color_transform_with_alpha
    ) >>
    filters: switch!(
      value!(version >= ButtonVersion::Button2 && has_filter_list),
      true => call!(parse_filter_list) |
      false => value!(Vec::new())
    )  >>
    blend_mode: switch!(
      value!(version >= ButtonVersion::Button2 && has_blend_mode),
      true => call!(parse_blend_mode) |
      false => value!(ast::BlendMode::Normal)
    )  >>
    (ast::ButtonRecord {
      state_up,
      state_over,
      state_down,
      state_hit_test,
      character_id,
      depth,
      matrix,
      color_transform,
      filters,
      blend_mode,
    })
  )
}

pub fn parse_button2_cond_action_string(input: &[u8]) -> NomResult<&[u8], Vec<ast::ButtonCondAction>> {
  let mut result: Vec<ast::ButtonCondAction> = Vec::new();
  let mut current_input: &[u8] = input;
  loop {
    let (input, next_action_offset) = parse_le_u16(current_input)?;

    let (input, next_input) = if next_action_offset == 0 {
      (input, &[] as &[u8])
    } else {
      let next_action_offset = next_action_offset as usize;
      let le_u16_size = current_input.len() - input.len();
      (&current_input[le_u16_size..next_action_offset], &current_input[next_action_offset..])
    };

    match parse_button2_cond_action(input) {
      Ok((_, cond_action)) => {
        current_input = next_input;
        result.push(cond_action);
      }
      Err(::nom::Err::Incomplete(_)) => return Err(::nom::Err::Incomplete(::nom::Needed::Unknown)),
      Err(e) => return Err(e),
    };
    if next_action_offset == 0 {
      break;
    }
  }
  Ok((current_input, result))
}

pub fn parse_button2_cond_action(input: &[u8]) -> NomResult<&[u8], ast::ButtonCondAction> {
  let (input, conditions) = parse_button_cond(input)?;
  let value = ast::ButtonCondAction {
    conditions: Some(conditions),
    actions: input.to_vec(),
  };
  Ok((&[][..], value))
}

pub fn parse_button_cond(input: &[u8]) -> NomResult<&[u8], ast::ButtonCond> {
  fn key_press_from_id(key_press_id: u16) -> Option<u32> {
    match key_press_id {
      0 => Option::None,
      k @ 1..=6 | k @ 8 | k @ 13..=19 | k @ 32..=126 => Some(k as u32),
      _ => panic!("InvalidKeyCode: {}", key_press_id),
    }
  }

  do_parse!(
    input,
    flags: parse_le_u16 >>
    key_press: map!(value!((flags >> 0) & 0x7f), key_press_from_id) >>
    over_down_to_idle: value!((flags & (1 << 7)) != 0) >>
    idle_to_over_up: value!((flags & (1 << 8)) != 0) >>
    over_up_to_idle: value!((flags & (1 << 9)) != 0) >>
    over_up_to_over_down: value!((flags & (1 << 10)) != 0) >>
    over_down_to_over_up: value!((flags & (1 << 11)) != 0) >>
    over_down_to_out_down: value!((flags & (1 << 12)) != 0) >>
    out_down_to_over_down: value!((flags & (1 << 13)) != 0) >>
    out_down_to_idle: value!((flags & (1 << 14)) != 0) >>
    idle_to_over_down: value!((flags & (1 << 15)) != 0) >>
    (ast::ButtonCond {
      key_press,
      over_down_to_idle,
      idle_to_over_up,
      over_up_to_idle,
      over_up_to_over_down,
      over_down_to_over_up,
      over_down_to_out_down,
      out_down_to_over_down,
      out_down_to_idle,
      idle_to_over_down,
    })
  )
}