1205 lines
39 KiB
Rust
1205 lines
39 KiB
Rust
use std::cell::RefCell;
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use std::ops::Range;
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use std::rc::Rc;
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use std::time::{Duration, Instant};
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use unicode_segmentation::UnicodeSegmentation;
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use gpui::prelude::FluentBuilder as _;
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use gpui::{
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App, AppContext as _, Bounds, ClipboardItem, Context, DispatchPhase, ElementId, Entity,
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EntityInputHandler, EventEmitter, Font, InteractiveElement as _, IntoElement, KeyDownEvent,
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MouseButton, MouseDownEvent, MouseMoveEvent, MouseUpEvent, ParentElement as _, Pixels,
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RenderOnce, Role, SharedString, StatefulInteractiveElement as _, Styled as _, TextAlign,
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TextRun, UTF16Selection, Window, canvas, div, fill, point, px,
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};
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use gpui_native_theme::{ActiveTheme as _, ColorTokens, Size};
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use crate::common::{Sizable, h_flex};
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/// Significant changes in an [`InputState`], observable via `cx.subscribe`.
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#[derive(Clone, Debug, PartialEq, Eq)]
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pub enum InputStateEvent {
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/// The text content changed: typing, paste, IME commit, or `set_value`.
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TextChanged,
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/// The field gained focus.
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Focused,
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/// The field lost focus.
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Blurred,
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/// Enter was pressed
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Submitted,
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}
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/// Input layout information for hit testing and caret positioning.
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struct InputLayout {
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line: gpui::ShapedLine,
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bounds: Bounds<Pixels>,
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/// Where the text was painted inside `bounds` (padding minus scroll).
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origin: gpui::Point<Pixels>,
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}
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/// Handler for key down events.
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type KeyDownHandler = std::rc::Rc<dyn Fn(&KeyDownEvent, &mut Window, &mut App)>;
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/// Handler for mouse down events.
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type MouseDownHandler = std::rc::Rc<dyn Fn(&MouseDownEvent, &mut Window, &mut App)>;
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/// Consecutive edits within this interval merge into one undo entry.
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const DEFAULT_GROUP_INTERVAL: Duration = Duration::from_millis(300);
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/// Maximum undo entries kept; the oldest drops off the front.
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const MAX_HISTORY: usize = 100;
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/// History entry for undo/redo operations.
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#[derive(Clone, Debug)]
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struct HistoryEntry {
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/// The range the replacement occupies after the edit.
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range: Range<usize>,
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/// The text the edit replaced, restored on undo.
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old_text: String,
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/// The length of the replacement.
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new_len: usize,
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/// The selection before the edit.
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cursor: usize,
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anchor: usize,
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/// When the edit happened, for grouping.
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timestamp: Instant,
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}
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impl HistoryEntry {
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/// Applies this entry in reverse, returning the entry that reverses it back.
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fn reverse(&self, text: &mut String) -> HistoryEntry {
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let end = (self.range.start + self.new_len).min(text.len());
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let removed = text[self.range.start..end].to_string();
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text.replace_range(self.range.start..end, &self.old_text);
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HistoryEntry {
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range: self.range.start..self.range.start + self.old_text.len(),
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old_text: removed,
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new_len: self.old_text.len(),
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cursor: self.cursor,
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anchor: self.anchor,
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timestamp: self.timestamp,
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}
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}
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}
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/// Input state for a single-line text field.
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pub struct InputState {
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text: String,
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/// The caret's byte offset.
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cursor: usize,
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/// The byte offset the selection extends from.
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anchor: usize,
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/// The byte range of in-progress IME composition, if any.
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marked_range: Option<Range<usize>>,
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/// Whether the field had focus at the last paint, for focus transitions.
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focused: bool,
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focus_handle: gpui::FocusHandle,
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/// The key-down handler, bound to this entity with `cx.listener`.
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key_down_handler: Option<KeyDownHandler>,
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/// The mouse-down handler, bound to this entity with `cx.listener`.
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mouse_down_handler: Option<MouseDownHandler>,
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/// Whether a drag-select is in progress.
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dragging: bool,
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/// Patch history. `redo_stack` holds undone entries awaiting redo.
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undo_stack: Vec<HistoryEntry>,
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redo_stack: Vec<HistoryEntry>,
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/// Consecutive edits within this interval merge into one undo entry.
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group_interval: Duration,
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/// When set, user edits are refused, focus, movement, selection and copy stay.
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read_only: bool,
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/// The shaped line and element bounds, recorded during each paint,
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/// and shared with hit-testing and the IME geometry conversions.
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layout: Rc<RefCell<Option<InputLayout>>>,
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}
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impl EventEmitter<InputStateEvent> for InputState {}
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impl InputState {
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fn new_inner(cx: &Context<Self>) -> Self {
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Self {
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text: String::new(),
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cursor: 0,
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anchor: 0,
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marked_range: None,
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focused: false,
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focus_handle: cx.focus_handle(),
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key_down_handler: Some(Rc::new(cx.listener(
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|state, event: &KeyDownEvent, window, cx| {
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state.handle_key_down(event, window, cx);
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},
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))),
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mouse_down_handler: Some(Rc::new(cx.listener(
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|state, event: &MouseDownEvent, window, cx| {
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state.handle_mouse_down(event, window, cx);
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},
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))),
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dragging: false,
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undo_stack: Vec::new(),
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redo_stack: Vec::new(),
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group_interval: DEFAULT_GROUP_INTERVAL,
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read_only: false,
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layout: Rc::new(RefCell::new(None)),
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}
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}
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/// Creates the state entity for an application-owned input.
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pub fn new(cx: &mut App) -> Entity<Self> {
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cx.new(|cx| Self::new_inner(cx))
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}
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/// Creates the state entity with initial text, caret at the end.
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///
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/// Newlines become spaces.
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pub fn new_with_text(text: impl Into<String>, cx: &mut App) -> Entity<Self> {
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let text = sanitize(text.into());
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cx.new(|cx| {
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let mut state = Self::new_inner(cx);
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state.text = text;
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state.cursor = state.text.len();
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state.anchor = state.cursor;
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state
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})
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}
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/// The current text.
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pub fn value(&self) -> &str {
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&self.text
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}
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/// Replaces the whole value and collapses the selection to the end.
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///
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/// Newlines become spaces. Emits [`InputStateEvent::TextChanged`]
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/// when the value changed, setting the current value is a no-op.
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pub fn set_value<V>(&mut self, value: V, window: &mut Window, cx: &mut Context<Self>)
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where
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V: Into<String>,
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{
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self.set_value_inner(value, true, window, cx);
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}
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/// Like [`set_value`], but does not emit `TextChanged`.
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pub fn set_value_silent<V>(&mut self, value: V, window: &mut Window, cx: &mut Context<Self>)
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where
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V: Into<String>,
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{
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self.set_value_inner(value, false, window, cx);
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}
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fn set_value_inner<V>(
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&mut self,
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value: V,
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emit: bool,
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window: &mut Window,
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cx: &mut Context<Self>,
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) where
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V: Into<String>,
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{
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let text = sanitize(value.into());
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if text == self.text {
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return;
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}
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self.text = text;
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self.cursor = self.text.len();
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self.anchor = self.cursor;
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self.marked_range = None;
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self.undo_stack.clear();
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self.redo_stack.clear();
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if emit {
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cx.emit(InputStateEvent::TextChanged);
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}
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self.notify(window, cx);
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}
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/// Sets how long consecutive edits keep merging into one undo entry.
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pub fn set_group_interval(&mut self, interval: Duration) {
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self.group_interval = interval;
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}
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/// Sets whether user edits are refused.
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pub fn set_read_only(&mut self, read_only: bool, cx: &mut Context<Self>) {
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if self.read_only != read_only {
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self.read_only = read_only;
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cx.notify();
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}
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}
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/// Whether user edits are refused.
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pub fn is_read_only(&self) -> bool {
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self.read_only
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}
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/// Records `old_text` at `range` being replaced by `new_len` bytes.
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fn push_history(&mut self, range: Range<usize>, old_text: String, new_len: usize) {
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self.redo_stack.clear();
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let now = Instant::now();
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if let Some(last) = self.undo_stack.last_mut()
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&& now.duration_since(last.timestamp) < self.group_interval
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{
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let last_end = last.range.start + last.new_len;
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// Typing that continues right after the previous edit.
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if range.start == last_end {
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last.new_len += new_len;
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last.timestamp = now;
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return;
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}
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// A deletion of text that sat right before the previous edit.
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if range.end == last.range.start && new_len == 0 {
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last.range.start = range.start;
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last.old_text = old_text + &last.old_text;
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last.timestamp = now;
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return;
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}
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// An edit fully inside the previous edit's replacement.
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if range.start >= last.range.start && range.end <= last_end {
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last.new_len += new_len;
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last.new_len -= range.len();
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last.timestamp = now;
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return;
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}
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}
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self.undo_stack.push(HistoryEntry {
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range: range.start..range.start + new_len,
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old_text,
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new_len,
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cursor: self.cursor,
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anchor: self.anchor,
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timestamp: now,
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});
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if self.undo_stack.len() > MAX_HISTORY {
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self.undo_stack.remove(0);
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}
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}
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/// Reverts the most recent edit group (`cmd-z`).
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fn undo(&mut self, window: &mut Window, cx: &mut Context<Self>) {
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if self.read_only {
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return;
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}
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let Some(entry) = self.undo_stack.pop() else {
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return;
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};
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let inverse = entry.reverse(&mut self.text);
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self.redo_stack.push(inverse);
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self.cursor = entry.cursor.min(self.text.len());
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self.anchor = entry.anchor.min(self.text.len());
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cx.emit(InputStateEvent::TextChanged);
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self.notify(window, cx);
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}
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/// Reapplies the most recently undone edit group (`cmd-shift-z`).
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fn redo(&mut self, window: &mut Window, cx: &mut Context<Self>) {
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if self.read_only {
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return;
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}
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let Some(entry) = self.redo_stack.pop() else {
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return;
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};
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let inverse = entry.reverse(&mut self.text);
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self.undo_stack.push(inverse);
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// The caret lands at the end of the restored text,
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// not where it was before the original edit.
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let caret = entry.range.start + entry.old_text.len();
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self.cursor = caret.min(self.text.len());
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self.anchor = self.cursor;
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cx.emit(InputStateEvent::TextChanged);
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self.notify(window, cx);
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}
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/// The focus handle, for applications that focus the field programmatically.
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pub fn focus_handle(&self) -> gpui::FocusHandle {
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self.focus_handle.clone()
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}
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/// The selected byte range of the buffer.
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fn selection(&self) -> Range<usize> {
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self.cursor.min(self.anchor)..self.cursor.max(self.anchor)
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}
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fn notify(&mut self, window: &mut Window, cx: &mut Context<Self>) {
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cx.notify();
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window.notify_text_input_changed(&self.focus_handle);
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}
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/// Emits `Focused`/`Blurred` when the field's focus state changed since the last paint.
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fn sync_focus(&mut self, focused: bool, cx: &mut Context<Self>) {
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if self.focused == focused {
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return;
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}
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self.focused = focused;
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cx.emit(if focused {
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InputStateEvent::Focused
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} else {
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InputStateEvent::Blurred
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});
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}
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/// Replaces a byte range with `text` and collapses the caret to its end.
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fn replace_range(
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&mut self,
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range: Range<usize>,
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text: &str,
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window: &mut Window,
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cx: &mut Context<Self>,
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) {
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if self.read_only {
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return;
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}
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if range.is_empty() && text.is_empty() {
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return;
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}
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let text = sanitize(text);
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let old_text = self.text[range.clone()].to_string();
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self.push_history(range.clone(), old_text, text.len());
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self.text.replace_range(range.clone(), &text);
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self.cursor = range.start + text.len();
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self.anchor = self.cursor;
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self.marked_range = None;
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cx.emit(InputStateEvent::TextChanged);
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self.notify(window, cx);
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}
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/// Deletes the selection, or one character/word before the caret.
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fn delete_backward(&mut self, word: bool, window: &mut Window, cx: &mut Context<Self>) {
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if !self.selection().is_empty() {
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let range = self.selection();
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self.replace_range(range, "", window, cx);
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} else if self.cursor > 0 {
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let start = if word {
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previous_word_start(&self.text, self.cursor)
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} else {
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previous_grapheme_start(&self.text, self.cursor)
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};
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self.replace_range(start..self.cursor, "", window, cx);
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}
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}
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/// Deletes the selection, or one character/word after the caret.
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fn delete_forward(&mut self, word: bool, window: &mut Window, cx: &mut Context<Self>) {
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if !self.selection().is_empty() {
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let range = self.selection();
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self.replace_range(range, "", window, cx);
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} else if self.cursor < self.text.len() {
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let end = if word {
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next_word_end(&self.text, self.cursor)
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} else {
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next_grapheme_start(&self.text, self.cursor)
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};
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self.replace_range(self.cursor..end, "", window, cx);
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}
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}
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/// Moves the caret, extending the selection when `extend`.
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fn move_cursor(
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&mut self,
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to: usize,
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extend: bool,
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window: &mut Window,
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cx: &mut Context<Self>,
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) {
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self.cursor = to.clamp(0, self.text.len());
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if !extend {
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self.anchor = self.cursor;
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}
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self.notify(window, cx);
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}
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/// Selects `range`.
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fn select_range(&mut self, range: Range<usize>, window: &mut Window, cx: &mut Context<Self>) {
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self.anchor = range.start;
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self.cursor = range.end;
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self.notify(window, cx);
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}
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/// Copies the selected text to the clipboard.
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fn copy_selection(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> bool {
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let range = self.selection();
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if range.is_empty() {
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return false;
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}
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cx.write_to_clipboard(ClipboardItem::new_string(
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self.text[range.clone()].to_string(),
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));
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true
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}
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/// Deletes the selected range, if any.
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fn delete_selection(&mut self, window: &mut Window, cx: &mut Context<Self>) {
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let range = self.selection();
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if !range.is_empty() {
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self.replace_range(range, "", window, cx);
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}
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}
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/// Shapes the buffer with the paint-time text style.
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fn shape_current_text(&self, window: &Window) -> gpui::ShapedLine {
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let text = self.text.clone();
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let text_style = window.text_style();
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let font = Font {
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family: text_style.font_family.clone(),
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features: text_style.font_features.clone(),
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weight: text_style.font_weight,
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style: text_style.font_style,
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fallbacks: text_style.font_fallbacks.clone(),
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};
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let font_size = text_style.font_size.to_pixels(window.rem_size());
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let runs = [TextRun {
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len: text.len(),
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font,
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color: text_style.color,
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background_color: None,
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underline: None,
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strikethrough: None,
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}];
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window
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.text_system()
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.shape_line(text.into(), font_size, &runs, None)
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}
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|
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/// Stores the paint geometry for hit-testing and the IME conversions.
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fn store_layout(
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&mut self,
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line: gpui::ShapedLine,
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bounds: Bounds<Pixels>,
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padding: Pixels,
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line_height: Pixels,
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) -> (gpui::Point<Pixels>, Pixels) {
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let selection = self.selection();
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let caret_x = line.x_for_index(selection.end);
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// Horizontal scroll keeps the caret inside the field.
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let visible = bounds.size.width - padding * 2.0;
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let scroll_x = if caret_x > visible {
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caret_x - visible
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} else {
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Pixels::ZERO
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};
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let origin = point(
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bounds.left() + padding - scroll_x,
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bounds.top() + (bounds.size.height - line_height) / 2.0,
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);
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*self.layout.borrow_mut() = Some(InputLayout {
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line,
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bounds,
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origin,
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});
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(origin, caret_x)
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}
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|
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/// Paints the selection highlight behind the text.
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fn paint_selection(
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&self,
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origin: gpui::Point<Pixels>,
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caret_x: Pixels,
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bounds: Bounds<Pixels>,
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color: gpui::Hsla,
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window: &mut Window,
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) {
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let selection = self.selection();
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if selection.is_empty() {
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return;
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}
|
|
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let layout = self.layout.borrow();
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let Some(layout) = layout.as_ref() else {
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return;
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};
|
|
|
|
let start_x = layout.line.x_for_index(selection.start);
|
|
let rect = Bounds::from_corners(
|
|
point(origin.x + start_x.min(caret_x), bounds.top() + px(1.)),
|
|
point(origin.x + start_x.max(caret_x), bounds.bottom() - px(1.)),
|
|
);
|
|
|
|
window.paint_quad(fill(rect, color));
|
|
}
|
|
|
|
/// Paints the text itself.
|
|
fn paint_text(
|
|
&self,
|
|
origin: gpui::Point<Pixels>,
|
|
line_height: Pixels,
|
|
window: &mut Window,
|
|
cx: &mut App,
|
|
) {
|
|
let layout = self.layout.borrow();
|
|
let Some(layout) = layout.as_ref() else {
|
|
return;
|
|
};
|
|
layout
|
|
.line
|
|
.paint(origin, line_height, TextAlign::Left, None, window, cx)
|
|
.ok();
|
|
}
|
|
|
|
/// Paints the caret at the cursor position.
|
|
fn paint_caret(
|
|
&self,
|
|
origin: gpui::Point<Pixels>,
|
|
caret_x: Pixels,
|
|
font_size: Pixels,
|
|
line_height: Pixels,
|
|
color: gpui::Hsla,
|
|
window: &mut Window,
|
|
) {
|
|
let caret_top = origin.y + (line_height - font_size) / 2.0;
|
|
let caret = Bounds::from_corners(
|
|
point(origin.x + caret_x, caret_top),
|
|
point(origin.x + caret_x + px(1.5), caret_top + font_size),
|
|
);
|
|
window.paint_quad(fill(caret, color));
|
|
}
|
|
|
|
/// Paints the field contents; returns whether a drag-select is in progress.
|
|
fn paint(
|
|
&mut self,
|
|
line: gpui::ShapedLine,
|
|
bounds: Bounds<Pixels>,
|
|
padding: Pixels,
|
|
colors: ColorTokens,
|
|
window: &mut Window,
|
|
cx: &mut Context<Self>,
|
|
) -> bool {
|
|
let focused = self.focus_handle.is_focused(window);
|
|
self.sync_focus(focused, cx);
|
|
|
|
let text_style = window.text_style();
|
|
let font_size = text_style.font_size.to_pixels(window.rem_size());
|
|
let line_height = text_style
|
|
.line_height
|
|
.to_pixels(text_style.font_size, window.rem_size());
|
|
|
|
let (origin, caret_x) = self.store_layout(line, bounds, padding, line_height);
|
|
|
|
if focused && !self.selection().is_empty() {
|
|
self.paint_selection(origin, caret_x, bounds, colors.selection, window);
|
|
}
|
|
|
|
self.paint_text(origin, line_height, window, cx);
|
|
|
|
// A caret promises that typing lands there; in read-only it does not.
|
|
if focused && !self.read_only && self.selection().is_empty() {
|
|
self.paint_caret(
|
|
origin,
|
|
caret_x,
|
|
font_size,
|
|
line_height,
|
|
colors.foreground,
|
|
window,
|
|
);
|
|
}
|
|
|
|
self.dragging
|
|
}
|
|
|
|
/// The text index at window x, using the last painted layout.
|
|
fn index_at_x(&self, x: Pixels) -> usize {
|
|
let layout = self.layout.borrow();
|
|
let Some(layout) = layout.as_ref() else {
|
|
return 0;
|
|
};
|
|
layout
|
|
.line
|
|
.closest_index_for_x(x - layout.origin.x)
|
|
.min(self.text.len())
|
|
}
|
|
|
|
/// Extends the selection to `x` while drag-selecting.
|
|
fn drag_select_to(&mut self, x: Pixels, window: &mut Window, cx: &mut Context<Self>) {
|
|
self.cursor = self.index_at_x(x);
|
|
self.notify(window, cx);
|
|
}
|
|
|
|
/// Registers the window-level listeners that continue a drag-select
|
|
/// while the pointer moves outside the field.
|
|
fn register_drag_listeners(entity: &Entity<Self>, window: &mut Window) {
|
|
window.on_mouse_event({
|
|
let state = entity.clone();
|
|
move |event: &MouseMoveEvent, phase, window, cx| {
|
|
if phase != DispatchPhase::Bubble || event.pressed_button != Some(MouseButton::Left)
|
|
{
|
|
return;
|
|
}
|
|
state.update(cx, |state, cx| {
|
|
state.drag_select_to(event.position.x, window, cx)
|
|
});
|
|
}
|
|
});
|
|
window.on_mouse_event({
|
|
let state = entity.clone();
|
|
move |event: &MouseUpEvent, phase, _window, cx| {
|
|
if phase != DispatchPhase::Bubble || event.button != MouseButton::Left {
|
|
return;
|
|
}
|
|
state.update(cx, |state, _| state.dragging = false);
|
|
}
|
|
});
|
|
}
|
|
|
|
/// The mouse-down handler: starts a drag and places or extends the selection.
|
|
fn handle_mouse_down(
|
|
&mut self,
|
|
event: &MouseDownEvent,
|
|
window: &mut Window,
|
|
cx: &mut Context<Self>,
|
|
) {
|
|
self.dragging = true;
|
|
|
|
let index = self.index_at_x(event.position.x);
|
|
|
|
if event.click_count >= 3 {
|
|
// A single-line field is one line: triple-click selects all of it.
|
|
let len = self.text.len();
|
|
self.select_range(0..len, window, cx);
|
|
} else if event.click_count == 2 {
|
|
let start = previous_word_start(&self.text, index);
|
|
let end = next_word_end(&self.text, index);
|
|
self.select_range(start..end, window, cx);
|
|
} else if event.modifiers.shift {
|
|
self.cursor = index;
|
|
self.notify(window, cx);
|
|
} else {
|
|
self.cursor = index;
|
|
self.anchor = index;
|
|
self.notify(window, cx);
|
|
}
|
|
}
|
|
|
|
/// The key-down handler: navigation, editing, clipboard, and submit.
|
|
///
|
|
/// Runs only while the field is focused.
|
|
fn handle_key_down(
|
|
&mut self,
|
|
event: &KeyDownEvent,
|
|
window: &mut Window,
|
|
cx: &mut Context<Self>,
|
|
) {
|
|
if !self.focus_handle.contains_focused(window, cx) {
|
|
return;
|
|
}
|
|
|
|
let keystroke = &event.keystroke;
|
|
let modifiers = keystroke.modifiers;
|
|
|
|
// macOS: cmd jumps to the field ends,
|
|
// cmd-backspace deletes to the start, alt is the word modifier.
|
|
//
|
|
// Elsewhere ctrl is the word modifier
|
|
// and the Home/End keys already cover the ends.
|
|
#[cfg(target_os = "macos")]
|
|
let (command, word, jump) = (modifiers.platform, modifiers.alt, modifiers.platform);
|
|
#[cfg(not(target_os = "macos"))]
|
|
let (command, word, jump) = (modifiers.control, modifiers.control, false);
|
|
|
|
match keystroke.key.as_str() {
|
|
"left" => {
|
|
let to = if jump {
|
|
0
|
|
} else if word {
|
|
previous_word_start(&self.text, self.cursor)
|
|
} else {
|
|
previous_grapheme_start(&self.text, self.cursor)
|
|
};
|
|
self.move_cursor(to, modifiers.shift, window, cx);
|
|
cx.stop_propagation();
|
|
}
|
|
"right" => {
|
|
let to = if jump {
|
|
self.text.len()
|
|
} else if word {
|
|
next_word_end(&self.text, self.cursor)
|
|
} else {
|
|
next_grapheme_start(&self.text, self.cursor)
|
|
};
|
|
self.move_cursor(to, modifiers.shift, window, cx);
|
|
cx.stop_propagation();
|
|
}
|
|
"up" => {
|
|
if jump {
|
|
self.move_cursor(0, modifiers.shift, window, cx);
|
|
cx.stop_propagation();
|
|
}
|
|
}
|
|
"down" => {
|
|
if jump {
|
|
self.move_cursor(self.text.len(), modifiers.shift, window, cx);
|
|
cx.stop_propagation();
|
|
}
|
|
}
|
|
"home" => {
|
|
self.move_cursor(0, modifiers.shift, window, cx);
|
|
cx.stop_propagation();
|
|
}
|
|
"end" => {
|
|
self.move_cursor(self.text.len(), modifiers.shift, window, cx);
|
|
cx.stop_propagation();
|
|
}
|
|
"backspace" => {
|
|
if jump {
|
|
// macOS cmd-backspace deletes to the field start.
|
|
let range = 0..self.cursor;
|
|
self.replace_range(range, "", window, cx);
|
|
} else {
|
|
self.delete_backward(word, window, cx);
|
|
}
|
|
cx.stop_propagation();
|
|
}
|
|
"delete" => {
|
|
self.delete_forward(word, window, cx);
|
|
cx.stop_propagation();
|
|
}
|
|
"a" if command => {
|
|
let len = self.text.len();
|
|
self.select_range(0..len, window, cx);
|
|
cx.stop_propagation();
|
|
}
|
|
"c" if command => {
|
|
if self.copy_selection(window, cx) {
|
|
cx.stop_propagation();
|
|
}
|
|
}
|
|
"x" if command => {
|
|
// Read-only refuses cut entirely, clipboard included.
|
|
if !self.read_only && self.copy_selection(window, cx) {
|
|
self.delete_selection(window, cx);
|
|
cx.stop_propagation();
|
|
}
|
|
}
|
|
"v" if command => {
|
|
if let Some(item) = cx.read_from_clipboard()
|
|
&& let Some(text) = item.text()
|
|
{
|
|
let range = self.selection();
|
|
self.replace_range(range, &text, window, cx);
|
|
}
|
|
cx.stop_propagation();
|
|
}
|
|
"z" if command => {
|
|
if modifiers.shift {
|
|
self.redo(window, cx);
|
|
} else {
|
|
self.undo(window, cx);
|
|
}
|
|
cx.stop_propagation();
|
|
}
|
|
"enter" => {
|
|
cx.emit(InputStateEvent::Submitted);
|
|
cx.stop_propagation();
|
|
}
|
|
"escape" => {
|
|
window.blur(cx);
|
|
cx.stop_propagation();
|
|
}
|
|
"tab" => {}
|
|
_ => {
|
|
if let Some(text) = &keystroke.key_char
|
|
&& !modifiers.platform
|
|
&& !modifiers.control
|
|
{
|
|
let range = self.selection();
|
|
self.replace_range(range, text, window, cx);
|
|
cx.stop_propagation();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl EntityInputHandler for InputState {
|
|
fn text_for_range(
|
|
&mut self,
|
|
range_utf16: Range<usize>,
|
|
adjusted_range: &mut Option<Range<usize>>,
|
|
_window: &mut Window,
|
|
_cx: &mut Context<Self>,
|
|
) -> Option<String> {
|
|
let range = utf16_range_to_utf8(&self.text, range_utf16);
|
|
adjusted_range.replace(utf8_range_to_utf16(&self.text, range.clone()));
|
|
Some(self.text[range].to_string())
|
|
}
|
|
|
|
fn selected_text_range(
|
|
&mut self,
|
|
_ignore_disabled_input: bool,
|
|
_window: &mut Window,
|
|
_cx: &mut Context<Self>,
|
|
) -> Option<UTF16Selection> {
|
|
Some(UTF16Selection {
|
|
range: utf8_range_to_utf16(&self.text, self.selection()),
|
|
reversed: self.cursor < self.anchor,
|
|
})
|
|
}
|
|
|
|
fn marked_text_range(
|
|
&self,
|
|
_window: &mut Window,
|
|
_cx: &mut Context<Self>,
|
|
) -> Option<Range<usize>> {
|
|
self.marked_range
|
|
.clone()
|
|
.map(|range| utf8_range_to_utf16(&self.text, range))
|
|
}
|
|
|
|
fn unmark_text(&mut self, _window: &mut Window, _cx: &mut Context<Self>) {
|
|
self.marked_range = None;
|
|
}
|
|
|
|
fn replace_text_in_range(
|
|
&mut self,
|
|
range_utf16: Option<Range<usize>>,
|
|
text: &str,
|
|
window: &mut Window,
|
|
cx: &mut Context<Self>,
|
|
) {
|
|
let range = range_utf16.map_or_else(
|
|
|| self.selection(),
|
|
|range| utf16_range_to_utf8(&self.text, range),
|
|
);
|
|
self.replace_range(range, text, window, cx);
|
|
}
|
|
|
|
fn replace_and_mark_text_in_range(
|
|
&mut self,
|
|
range_utf16: Option<Range<usize>>,
|
|
new_text: &str,
|
|
new_selected_range_utf16: Option<Range<usize>>,
|
|
window: &mut Window,
|
|
cx: &mut Context<Self>,
|
|
) {
|
|
if self.read_only {
|
|
return;
|
|
}
|
|
|
|
let range = range_utf16.map_or_else(
|
|
|| self.selection(),
|
|
|range| utf16_range_to_utf8(&self.text, range),
|
|
);
|
|
|
|
let new_text = sanitize(new_text);
|
|
let old_text = self.text[range.clone()].to_string();
|
|
self.push_history(range.clone(), old_text, new_text.len());
|
|
self.text.replace_range(range.clone(), &new_text);
|
|
|
|
let start = range.start;
|
|
let end = start + new_text.len();
|
|
self.marked_range = Some(start..end);
|
|
|
|
let selected_end = new_selected_range_utf16
|
|
.map(|selected| utf16_range_to_utf8(&self.text, selected).end)
|
|
.unwrap_or(end);
|
|
|
|
self.cursor = selected_end;
|
|
self.anchor = selected_end;
|
|
|
|
cx.emit(InputStateEvent::TextChanged);
|
|
self.notify(window, cx);
|
|
}
|
|
|
|
fn bounds_for_range(
|
|
&mut self,
|
|
range_utf16: Range<usize>,
|
|
_element_bounds: Bounds<Pixels>,
|
|
_window: &mut Window,
|
|
_cx: &mut Context<Self>,
|
|
) -> Option<Bounds<Pixels>> {
|
|
let layout = self.layout.borrow();
|
|
let layout = layout.as_ref()?;
|
|
|
|
let start = layout
|
|
.line
|
|
.x_for_index(utf16_to_utf8_offset(&self.text, range_utf16.start));
|
|
|
|
let end = layout
|
|
.line
|
|
.x_for_index(utf16_to_utf8_offset(&self.text, range_utf16.end));
|
|
|
|
// `origin` is already an absolute window point.
|
|
Some(Bounds::from_corners(
|
|
point(layout.origin.x + start.min(end), layout.bounds.top()),
|
|
point(layout.origin.x + start.max(end), layout.bounds.bottom()),
|
|
))
|
|
}
|
|
|
|
fn character_index_for_point(
|
|
&mut self,
|
|
window_point: gpui::Point<Pixels>,
|
|
_window: &mut Window,
|
|
_cx: &mut Context<Self>,
|
|
) -> Option<usize> {
|
|
let layout = self.layout.borrow();
|
|
let layout = layout.as_ref()?;
|
|
Some(
|
|
layout
|
|
.line
|
|
.closest_index_for_x(window_point.x - layout.origin.x)
|
|
.min(self.text.len()),
|
|
)
|
|
}
|
|
|
|
fn text_length_utf16(
|
|
&mut self,
|
|
_window: &mut Window,
|
|
_cx: &mut Context<Self>,
|
|
) -> Option<usize> {
|
|
Some(self.text.encode_utf16().count())
|
|
}
|
|
}
|
|
|
|
/// Newlines have no meaning in a single-line field.
|
|
fn sanitize(text: impl Into<String>) -> String {
|
|
text.into().replace('\n', " ").replace('\r', "")
|
|
}
|
|
|
|
/// Floors `index` to the nearest grapheme-cluster boundary at or below it.
|
|
fn previous_grapheme_start(text: &str, index: usize) -> usize {
|
|
text.grapheme_indices(true)
|
|
.rev()
|
|
.find(|(offset, _)| *offset < index)
|
|
.map(|(offset, _)| offset)
|
|
.unwrap_or(0)
|
|
}
|
|
|
|
/// Advances `index` to the next grapheme-cluster boundary.
|
|
fn next_grapheme_start(text: &str, index: usize) -> usize {
|
|
text.grapheme_indices(true)
|
|
.find(|(offset, _)| *offset > index)
|
|
.map(|(offset, _)| offset)
|
|
.unwrap_or(text.len())
|
|
}
|
|
|
|
/// The start of the word before `from`.
|
|
fn previous_word_start(text: &str, from: usize) -> usize {
|
|
let mut best = 0;
|
|
for (offset, word) in text.split_word_bound_indices() {
|
|
if offset >= from {
|
|
break;
|
|
}
|
|
if !word.starts_with(char::is_whitespace) {
|
|
best = offset;
|
|
}
|
|
}
|
|
best
|
|
}
|
|
|
|
/// The end of the word after `from`.
|
|
fn next_word_end(text: &str, from: usize) -> usize {
|
|
for (offset, word) in text.split_word_bound_indices() {
|
|
let end = offset + word.len();
|
|
if end > from && !word.starts_with(char::is_whitespace) {
|
|
return end;
|
|
}
|
|
}
|
|
text.len()
|
|
}
|
|
|
|
/// Converts a UTF-16 offset into a UTF-8 byte offset.
|
|
fn utf16_to_utf8_offset(text: &str, utf16_offset: usize) -> usize {
|
|
let mut utf16_count = 0;
|
|
for (byte_offset, char) in text.char_indices() {
|
|
if utf16_count >= utf16_offset {
|
|
return byte_offset;
|
|
}
|
|
utf16_count += char.len_utf16();
|
|
}
|
|
text.len()
|
|
}
|
|
|
|
/// Converts a UTF-8 byte range to a UTF-16 range.
|
|
fn utf8_range_to_utf16(text: &str, range: Range<usize>) -> Range<usize> {
|
|
utf16_to_utf8_offset(text, range.start)..utf16_to_utf8_offset(text, range.end)
|
|
}
|
|
|
|
/// Converts a UTF-16 range to a UTF-8 byte range.
|
|
fn utf16_range_to_utf8(text: &str, range: Range<usize>) -> Range<usize> {
|
|
utf16_to_utf8_offset(text, range.start)..utf16_to_utf8_offset(text, range.end)
|
|
}
|
|
|
|
/// A single-line text field bound to an application-owned [`InputState`].
|
|
#[derive(IntoElement)]
|
|
pub struct Input {
|
|
id: ElementId,
|
|
state: Entity<InputState>,
|
|
placeholder: SharedString,
|
|
size: Size,
|
|
disabled: bool,
|
|
a11y_label: Option<SharedString>,
|
|
}
|
|
|
|
impl Input {
|
|
/// Creates a text field bound to `state`.
|
|
pub fn new<I>(id: I, state: Entity<InputState>) -> Self
|
|
where
|
|
I: Into<ElementId>,
|
|
{
|
|
Self {
|
|
id: id.into(),
|
|
state,
|
|
placeholder: SharedString::default(),
|
|
size: Size::default(),
|
|
disabled: false,
|
|
a11y_label: None,
|
|
}
|
|
}
|
|
|
|
/// Sets the placeholder shown when the field is empty and unfocused.
|
|
pub fn placeholder<P>(mut self, placeholder: P) -> Self
|
|
where
|
|
P: Into<SharedString>,
|
|
{
|
|
self.placeholder = placeholder.into();
|
|
self
|
|
}
|
|
|
|
/// Renders the field inert, unfocusable, and dimmed; disabled always wins.
|
|
pub fn disabled(mut self, disabled: bool) -> Self {
|
|
self.disabled = disabled;
|
|
self
|
|
}
|
|
|
|
/// Overrides the accessibility label.
|
|
pub fn accessibility_label<L>(mut self, label: L) -> Self
|
|
where
|
|
L: Into<SharedString>,
|
|
{
|
|
self.a11y_label = Some(label.into());
|
|
self
|
|
}
|
|
}
|
|
|
|
impl Sizable for Input {
|
|
fn apply_size(&mut self, size: Size) {
|
|
self.size = size;
|
|
}
|
|
}
|
|
|
|
impl RenderOnce for Input {
|
|
fn render(self, window: &mut Window, cx: &mut App) -> impl IntoElement {
|
|
let theme = cx.theme();
|
|
let colors = theme.colors;
|
|
let radius = theme.radius;
|
|
let metrics = theme.sizes.resolve(self.size);
|
|
let focus_handle = self.state.read(cx).focus_handle.clone();
|
|
|
|
let focused = focus_handle.is_focused(window);
|
|
let is_empty = self.state.read(cx).text.is_empty();
|
|
|
|
let fallback_label = self
|
|
.a11y_label
|
|
.clone()
|
|
.or_else(|| (!self.placeholder.is_empty()).then_some(self.placeholder.clone()))
|
|
.unwrap_or_else(|| SharedString::from(self.id.to_string()));
|
|
|
|
h_flex()
|
|
.id(self.id.clone())
|
|
.role(Role::TextInput)
|
|
.aria_label(fallback_label)
|
|
.relative()
|
|
.overflow_hidden()
|
|
.w_full()
|
|
.h(metrics.input_height)
|
|
.px(metrics.padding_x / 2.0)
|
|
.rounded(radius.control)
|
|
.border_1()
|
|
.border_color(colors.border)
|
|
.bg(colors.input)
|
|
.text_size(metrics.text_size)
|
|
.text_color(colors.foreground)
|
|
.when(self.disabled, |input| input.opacity(0.5))
|
|
.when(!self.disabled, |input| {
|
|
input.track_focus(&focus_handle).tab_stop(true)
|
|
})
|
|
.when(focused, |input| input.border_color(colors.ring))
|
|
.when(is_empty && !focused, |input| {
|
|
input.child(
|
|
div()
|
|
.text_color(colors.muted_foreground)
|
|
.child(self.placeholder.clone()),
|
|
)
|
|
})
|
|
.child(
|
|
canvas(
|
|
{
|
|
let state = self.state.clone();
|
|
move |_bounds, window, cx| state.read(cx).shape_current_text(window)
|
|
},
|
|
{
|
|
let state = self.state.clone();
|
|
let focus = focus_handle.clone();
|
|
let padding = metrics.padding_x / 2.0;
|
|
let disabled = self.disabled;
|
|
|
|
// `line` comes from the prepaint closure above.
|
|
move |bounds, line, window, cx| {
|
|
let dragging = state.update(cx, |state, cx| {
|
|
state.paint(line, bounds, padding, colors, window, cx)
|
|
});
|
|
|
|
if disabled {
|
|
return;
|
|
}
|
|
|
|
window.handle_input(
|
|
&focus,
|
|
gpui::ElementInputHandler::new(bounds, state.clone()),
|
|
cx,
|
|
);
|
|
|
|
if dragging {
|
|
InputState::register_drag_listeners(&state, window);
|
|
}
|
|
}
|
|
},
|
|
)
|
|
.absolute()
|
|
.inset_0(),
|
|
)
|
|
.when(!self.disabled, |input| {
|
|
input
|
|
.on_mouse_down(MouseButton::Left, {
|
|
let mouse_down_handler = self
|
|
.state
|
|
.read(cx)
|
|
.mouse_down_handler
|
|
.clone()
|
|
.expect("input state always carries its mouse-down handler");
|
|
move |event: &MouseDownEvent, window, cx| {
|
|
mouse_down_handler(event, window, cx);
|
|
}
|
|
})
|
|
.on_key_down({
|
|
let key_down_handler = self
|
|
.state
|
|
.read(cx)
|
|
.key_down_handler
|
|
.clone()
|
|
.expect("input state always carries its key handler");
|
|
move |event: &KeyDownEvent, window, cx| {
|
|
key_down_handler(event, window, cx);
|
|
}
|
|
})
|
|
})
|
|
}
|
|
}
|