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use super::tool_prelude::*;
use crate::messages::tool::utility_types::DocumentToolData;
#[derive(Default)]
pub struct EyedropperTool {
fsm_state: EyedropperToolFsmState,
data: EyedropperToolData,
}
#[impl_message(Message, ToolMessage, Eyedropper)]
#[derive(PartialEq, Eq, Clone, Debug, Hash, serde::Serialize, serde::Deserialize, specta::Type)]
pub enum EyedropperToolMessage {
// Standard messages
Abort,
// Tool-specific messages
SamplePrimaryColorBegin,
SamplePrimaryColorEnd,
PointerMove,
SampleSecondaryColorBegin,
SampleSecondaryColorEnd,
}
impl ToolMetadata for EyedropperTool {
fn icon_name(&self) -> String {
"GeneralEyedropperTool".into()
}
fn tooltip(&self) -> String {
"Eyedropper Tool".into()
}
fn tool_type(&self) -> crate::messages::tool::utility_types::ToolType {
ToolType::Eyedropper
}
}
impl LayoutHolder for EyedropperTool {
fn layout(&self) -> Layout {
Layout::WidgetLayout(WidgetLayout::default())
}
}
impl<'a> MessageHandler<ToolMessage, &mut ToolActionHandlerData<'a>> for EyedropperTool {
fn process_message(&mut self, message: ToolMessage, responses: &mut VecDeque<Message>, tool_data: &mut ToolActionHandlerData<'a>) {
self.fsm_state.process_event(message, &mut self.data, tool_data, &(), responses, true);
}
advertise_actions!(EyedropperToolMessageDiscriminant;
SamplePrimaryColorBegin,
SamplePrimaryColorEnd,
SampleSecondaryColorBegin,
SampleSecondaryColorEnd,
PointerMove,
Abort,
);
}
impl ToolTransition for EyedropperTool {
fn event_to_message_map(&self) -> EventToMessageMap {
EventToMessageMap {
tool_abort: Some(EyedropperToolMessage::Abort.into()),
working_color_changed: Some(EyedropperToolMessage::PointerMove.into()),
..Default::default()
}
}
}
#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
enum EyedropperToolFsmState {
#[default]
Ready,
SamplingPrimary,
SamplingSecondary,
}
#[derive(Clone, Debug, Default)]
struct EyedropperToolData {}
impl Fsm for EyedropperToolFsmState {
type ToolData = EyedropperToolData;
type ToolOptions = ();
fn transition(self, event: ToolMessage, _tool_data: &mut Self::ToolData, tool_action_data: &mut ToolActionHandlerData, _tool_options: &(), responses: &mut VecDeque<Message>) -> Self {
let ToolActionHandlerData { global_tool_data, input, .. } = tool_action_data;
let ToolMessage::Eyedropper(event) = event else { return self };
match (self, event) {
// Ready -> Sampling
(EyedropperToolFsmState::Ready, mouse_down) if matches!(mouse_down, EyedropperToolMessage::SamplePrimaryColorBegin | EyedropperToolMessage::SampleSecondaryColorBegin) => {
update_cursor_preview(responses, input, global_tool_data, None);
if mouse_down == EyedropperToolMessage::SamplePrimaryColorBegin {
EyedropperToolFsmState::SamplingPrimary
} else {
EyedropperToolFsmState::SamplingSecondary
}
}
// Sampling -> Sampling
(EyedropperToolFsmState::SamplingPrimary | EyedropperToolFsmState::SamplingSecondary, EyedropperToolMessage::PointerMove) => {
if input.viewport_bounds.in_bounds(input.mouse.position) {
update_cursor_preview(responses, input, global_tool_data, None);
} else {
disable_cursor_preview(responses);
}
self
}
// Sampling -> Ready
(EyedropperToolFsmState::SamplingPrimary, EyedropperToolMessage::SamplePrimaryColorEnd) | (EyedropperToolFsmState::SamplingSecondary, EyedropperToolMessage::SampleSecondaryColorEnd) => {
let set_color_choice = if self == EyedropperToolFsmState::SamplingPrimary { "Primary" } else { "Secondary" }.to_string();
update_cursor_preview(responses, input, global_tool_data, Some(set_color_choice));
disable_cursor_preview(responses);
EyedropperToolFsmState::Ready
}
// Any -> Ready
(_, EyedropperToolMessage::Abort) => {
disable_cursor_preview(responses);
EyedropperToolFsmState::Ready
}
// Ready -> Ready
_ => self,
}
}
fn update_hints(&self, responses: &mut VecDeque<Message>) {
let hint_data = match self {
EyedropperToolFsmState::Ready => HintData(vec![HintGroup(vec![
HintInfo::mouse(MouseMotion::Lmb, "Sample to Primary"),
HintInfo::keys_and_mouse([Key::Shift], MouseMotion::Lmb, "Sample to Secondary"),
])]),
EyedropperToolFsmState::SamplingPrimary | EyedropperToolFsmState::SamplingSecondary => {
HintData(vec![HintGroup(vec![HintInfo::mouse(MouseMotion::Rmb, ""), HintInfo::keys([Key::Escape], "Cancel").prepend_slash()])])
}
};
responses.add(FrontendMessage::UpdateInputHints { hint_data });
}
fn update_cursor(&self, responses: &mut VecDeque<Message>) {
let cursor = match *self {
EyedropperToolFsmState::Ready => MouseCursorIcon::Default,
EyedropperToolFsmState::SamplingPrimary | EyedropperToolFsmState::SamplingSecondary => MouseCursorIcon::None,
};
responses.add(FrontendMessage::UpdateMouseCursor { cursor });
}
}
fn disable_cursor_preview(responses: &mut VecDeque<Message>) {
responses.add(FrontendMessage::UpdateEyedropperSamplingState {
mouse_position: None,
primary_color: "".into(),
secondary_color: "".into(),
set_color_choice: None,
});
}
fn update_cursor_preview(responses: &mut VecDeque<Message>, input: &InputPreprocessorMessageHandler, global_tool_data: &DocumentToolData, set_color_choice: Option<String>) {
responses.add(FrontendMessage::UpdateEyedropperSamplingState {
mouse_position: Some(input.mouse.position.into()),
primary_color: "#".to_string() + global_tool_data.primary_color.to_rgb_hex_srgb().as_str(),
secondary_color: "#".to_string() + global_tool_data.secondary_color.to_rgb_hex_srgb().as_str(),
set_color_choice,
});
}
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