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gpui-component/crates/ui/src/input/state.rs
Jason Lee 43c848893c
input: Refactor start_of_line, end_of_line by use Rope. (#1232) 
- Removed `Cursor` struct, now use `usize` for selection offset.
2025-09-10 14:43:11 +08:00

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//! A text input field that allows the user to enter text.
//!
//! Based on the `Input` example from the `gpui` crate.
//! https://github.com/zed-industries/zed/blob/main/crates/gpui/examples/input.rs
use gpui::Action;
use rope::Rope;
use serde::Deserialize;
use smallvec::SmallVec;
use std::cell::RefCell;
use std::ops::Range;
use std::rc::Rc;
use sum_tree::Bias;
use unicode_segmentation::*;
use gpui::{
actions, div, point, prelude::FluentBuilder as _, px, App, AppContext, Bounds, ClipboardItem,
Context, Entity, EntityInputHandler, EventEmitter, FocusHandle, Focusable,
InteractiveElement as _, IntoElement, KeyBinding, KeyDownEvent, MouseButton, MouseDownEvent,
MouseMoveEvent, MouseUpEvent, ParentElement as _, Pixels, Point, Render, ScrollHandle,
ScrollWheelEvent, SharedString, Styled as _, Subscription, UTF16Selection, Window, WrappedLine,
};
use super::{
blink_cursor::BlinkCursor,
change::Change,
element::TextElement,
mask_pattern::MaskPattern,
mode::{InputMode, TabSize},
number_input,
text_wrapper::TextWrapper,
};
use crate::input::hover_popover::DiagnosticPopover;
use crate::input::marker::Marker;
use crate::input::text_wrapper::LineWrap;
use crate::input::{LineColumn, RopeExt as _, Selection};
use crate::{history::History, scroll::ScrollbarState, Root};
#[derive(Action, Clone, PartialEq, Eq, Deserialize)]
#[action(namespace = input, no_json)]
pub struct Enter {
/// Is confirm with secondary.
pub secondary: bool,
}
actions!(
input,
[
Backspace,
Delete,
DeleteToBeginningOfLine,
DeleteToEndOfLine,
DeleteToPreviousWordStart,
DeleteToNextWordEnd,
Indent,
Outdent,
IndentInline,
OutdentInline,
MoveUp,
MoveDown,
MoveLeft,
MoveRight,
MoveHome,
MoveEnd,
MovePageUp,
MovePageDown,
SelectUp,
SelectDown,
SelectLeft,
SelectRight,
SelectAll,
SelectToStartOfLine,
SelectToEndOfLine,
SelectToStart,
SelectToEnd,
SelectToPreviousWordStart,
SelectToNextWordEnd,
ShowCharacterPalette,
Copy,
Cut,
Paste,
Undo,
Redo,
MoveToStartOfLine,
MoveToEndOfLine,
MoveToStart,
MoveToEnd,
MoveToPreviousWord,
MoveToNextWord,
Escape
]
);
#[derive(Clone)]
pub enum InputEvent {
Change(SharedString),
PressEnter { secondary: bool },
Focus,
Blur,
}
pub(super) const CONTEXT: &str = "Input";
pub fn init(cx: &mut App) {
cx.bind_keys([
KeyBinding::new("backspace", Backspace, Some(CONTEXT)),
KeyBinding::new("delete", Delete, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-backspace", DeleteToBeginningOfLine, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-delete", DeleteToEndOfLine, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("alt-backspace", DeleteToPreviousWordStart, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-backspace", DeleteToPreviousWordStart, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("alt-delete", DeleteToNextWordEnd, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-delete", DeleteToNextWordEnd, Some(CONTEXT)),
KeyBinding::new("enter", Enter { secondary: false }, Some(CONTEXT)),
KeyBinding::new("secondary-enter", Enter { secondary: true }, Some(CONTEXT)),
KeyBinding::new("escape", Escape, Some(CONTEXT)),
KeyBinding::new("up", MoveUp, Some(CONTEXT)),
KeyBinding::new("down", MoveDown, Some(CONTEXT)),
KeyBinding::new("left", MoveLeft, Some(CONTEXT)),
KeyBinding::new("right", MoveRight, Some(CONTEXT)),
KeyBinding::new("pageup", MovePageUp, Some(CONTEXT)),
KeyBinding::new("pagedown", MovePageDown, Some(CONTEXT)),
KeyBinding::new("tab", IndentInline, Some(CONTEXT)),
KeyBinding::new("shift-tab", OutdentInline, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-]", Indent, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-]", Indent, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-[", Outdent, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-[", Outdent, Some(CONTEXT)),
KeyBinding::new("shift-left", SelectLeft, Some(CONTEXT)),
KeyBinding::new("shift-right", SelectRight, Some(CONTEXT)),
KeyBinding::new("shift-up", SelectUp, Some(CONTEXT)),
KeyBinding::new("shift-down", SelectDown, Some(CONTEXT)),
KeyBinding::new("home", MoveHome, Some(CONTEXT)),
KeyBinding::new("end", MoveEnd, Some(CONTEXT)),
KeyBinding::new("shift-home", SelectToStartOfLine, Some(CONTEXT)),
KeyBinding::new("shift-end", SelectToEndOfLine, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("ctrl-shift-a", SelectToStartOfLine, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("ctrl-shift-e", SelectToEndOfLine, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("shift-cmd-left", SelectToStartOfLine, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("shift-cmd-right", SelectToEndOfLine, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("alt-shift-left", SelectToPreviousWordStart, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-shift-left", SelectToPreviousWordStart, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("alt-shift-right", SelectToNextWordEnd, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-shift-right", SelectToNextWordEnd, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("ctrl-cmd-space", ShowCharacterPalette, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-a", SelectAll, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-a", SelectAll, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-c", Copy, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-c", Copy, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-x", Cut, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-x", Cut, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-v", Paste, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-v", Paste, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("ctrl-a", MoveHome, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-left", MoveHome, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("ctrl-e", MoveEnd, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-right", MoveEnd, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-z", Undo, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-shift-z", Redo, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-up", MoveToStart, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-down", MoveToEnd, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("alt-left", MoveToPreviousWord, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("alt-right", MoveToNextWord, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-left", MoveToPreviousWord, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-right", MoveToNextWord, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-shift-up", SelectToStart, Some(CONTEXT)),
#[cfg(target_os = "macos")]
KeyBinding::new("cmd-shift-down", SelectToEnd, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-z", Undo, Some(CONTEXT)),
#[cfg(not(target_os = "macos"))]
KeyBinding::new("ctrl-y", Redo, Some(CONTEXT)),
]);
number_input::init(cx);
}
#[derive(Clone)]
pub(super) struct LastLayout {
/// The visible range (no wrap) of lines in the viewport, the value is row (0-based) index.
pub(super) visible_range: Range<usize>,
/// The first visible line top position in scroll viewport.
pub(super) visible_top: Pixels,
/// The start byte offset of the first visible line.
pub(super) visible_start_offset: usize,
/// The last layout lines (Only have visible lines).
pub(super) lines: Rc<SmallVec<[WrappedLine; 1]>>,
/// The line_height of text layout, this will change will InputElement painted.
pub(super) line_height: Pixels,
/// The wrap width of text layout, this will change will InputElement painted.
pub(super) wrap_width: Option<Pixels>,
/// The line number area width of text layout, if not line number, this will be 0px.
pub(super) line_number_width: Pixels,
}
/// InputState to keep editing state of the [`super::TextInput`].
pub struct InputState {
pub(super) focus_handle: FocusHandle,
pub(super) mode: InputMode,
pub(super) text: Rope,
pub(super) text_wrapper: TextWrapper,
pub(super) history: History<Change>,
pub(super) blink_cursor: Entity<BlinkCursor>,
pub(super) loading: bool,
/// Range in UTF-8 length for the selected text.
///
/// - "Hello 世界💝" = 16
/// - "💝" = 4
pub(super) selected_range: Selection,
/// Range for save the selected word, use to keep word range when drag move.
pub(super) selected_word_range: Option<Selection>,
pub(super) selection_reversed: bool,
/// The marked range is the temporary insert text on IME typing.
pub(super) marked_range: Option<Selection>,
pub(super) last_layout: Option<LastLayout>,
pub(super) last_cursor: Option<usize>,
/// The input container bounds
pub(super) input_bounds: Bounds<Pixels>,
/// The text bounds
pub(super) last_bounds: Option<Bounds<Pixels>>,
pub(super) last_selected_range: Option<Selection>,
pub(super) selecting: bool,
pub(super) disabled: bool,
pub(super) masked: bool,
pub(super) clean_on_escape: bool,
pub(super) soft_wrap: bool,
pub(super) pattern: Option<regex::Regex>,
pub(super) validate: Option<Box<dyn Fn(&str, &mut Context<Self>) -> bool + 'static>>,
pub(crate) scroll_handle: ScrollHandle,
pub(super) scroll_state: ScrollbarState,
/// The size of the scrollable content.
pub(crate) scroll_size: gpui::Size<Pixels>,
/// The mask pattern for formatting the input text
pub(crate) mask_pattern: MaskPattern,
pub(super) placeholder: SharedString,
/// Popover
diagnostic_popover: Option<Entity<DiagnosticPopover>>,
/// To remember the horizontal column (x-coordinate) of the cursor position for keep column for move up/down.
preferred_column: Option<usize>,
_subscriptions: Vec<Subscription>,
}
impl EventEmitter<InputEvent> for InputState {}
impl InputState {
/// Create a Input state with default [`InputMode::SingleLine`] mode.
///
/// See also: [`Self::multi_line`], [`Self::auto_grow`] to set other mode.
pub fn new(window: &mut Window, cx: &mut Context<Self>) -> Self {
let focus_handle = cx.focus_handle();
let blink_cursor = cx.new(|_| BlinkCursor::new());
let history = History::new().group_interval(std::time::Duration::from_secs(1));
let _subscriptions = vec![
// Observe the blink cursor to repaint the view when it changes.
cx.observe(&blink_cursor, |_, _, cx| cx.notify()),
// Blink the cursor when the window is active, pause when it's not.
cx.observe_window_activation(window, |input, window, cx| {
if window.is_window_active() {
let focus_handle = input.focus_handle.clone();
if focus_handle.is_focused(window) {
input.blink_cursor.update(cx, |blink_cursor, cx| {
blink_cursor.start(cx);
});
}
}
}),
cx.on_focus(&focus_handle, window, Self::on_focus),
cx.on_blur(&focus_handle, window, Self::on_blur),
];
let text_style = window.text_style();
Self {
focus_handle: focus_handle.clone(),
text: "".into(),
text_wrapper: TextWrapper::new(
text_style.font(),
text_style.font_size.to_pixels(window.rem_size()),
None,
),
blink_cursor,
history,
selected_range: Selection::default(),
selected_word_range: None,
selection_reversed: false,
marked_range: None,
input_bounds: Bounds::default(),
selecting: false,
disabled: false,
masked: false,
clean_on_escape: false,
soft_wrap: true,
loading: false,
pattern: None,
validate: None,
mode: InputMode::SingleLine,
last_layout: None,
last_bounds: None,
last_selected_range: None,
last_cursor: None,
scroll_handle: ScrollHandle::new(),
scroll_state: ScrollbarState::default(),
scroll_size: gpui::size(px(0.), px(0.)),
preferred_column: None,
placeholder: SharedString::default(),
mask_pattern: MaskPattern::default(),
diagnostic_popover: None,
_subscriptions,
}
}
/// Set Input to use [`InputMode::MultiLine`] mode.
///
/// Default rows is 2.
pub fn multi_line(mut self) -> Self {
self.mode = InputMode::MultiLine {
rows: 2,
tab: TabSize::default(),
};
self
}
/// Set Input to use [`InputMode::AutoGrow`] mode with min, max rows limit.
pub fn auto_grow(mut self, min_rows: usize, max_rows: usize) -> Self {
self.mode = InputMode::AutoGrow {
rows: min_rows,
min_rows: min_rows,
max_rows: max_rows,
};
self
}
/// Set Input to use [`InputMode::CodeEditor`] mode.
///
/// Default options:
///
/// - line_number: true
/// - tab_size: 2
/// - hard_tabs: false
/// - height: full
///
/// If `highlighter` is None, will use the default highlighter.
///
/// Code Editor aim for help used to simple code editing or display, not a full-featured code editor.
///
/// ## Features
///
/// - Syntax Highlighting
/// - Auto Indent
/// - Line Number
/// - Large Text support, up to 50K lines.
pub fn code_editor(mut self, language: impl Into<SharedString>) -> Self {
let language: SharedString = language.into();
self.mode = InputMode::CodeEditor {
rows: 2,
tab: TabSize::default(),
language,
highlighter: Rc::new(RefCell::new(None)),
line_number: true,
markers: Rc::new(vec![]),
};
self
}
/// Set placeholder
pub fn placeholder(mut self, placeholder: impl Into<SharedString>) -> Self {
self.placeholder = placeholder.into();
self
}
/// Set enable/disable line number, only for [`InputMode::CodeEditor`] mode.
pub fn line_number(mut self, line_number: bool) -> Self {
if let InputMode::CodeEditor { line_number: l, .. } = &mut self.mode {
*l = line_number;
}
self
}
/// Set line number, only for [`InputMode::CodeEditor`] mode.
pub fn set_line_number(&mut self, line_number: bool, _: &mut Window, cx: &mut Context<Self>) {
if let InputMode::CodeEditor { line_number: l, .. } = &mut self.mode {
*l = line_number;
}
cx.notify();
}
/// Set the tab size for the input.
///
/// Only for [`InputMode::MultiLine`] and [`InputMode::CodeEditor`] mode.
pub fn tab_size(mut self, tab: TabSize) -> Self {
match &mut self.mode {
InputMode::MultiLine { tab: t, .. } => *t = tab,
InputMode::CodeEditor { tab: t, .. } => *t = tab,
_ => {}
}
self
}
/// Set the number of rows for the multi-line Textarea.
///
/// This is only used when `multi_line` is set to true.
///
/// default: 2
pub fn rows(mut self, rows: usize) -> Self {
match &mut self.mode {
InputMode::MultiLine { rows: r, .. } => *r = rows,
InputMode::AutoGrow {
max_rows: max_r,
rows: r,
..
} => {
*r = rows;
*max_r = rows;
}
_ => {}
}
self
}
/// Set highlighter language for for [`InputMode::CodeEditor`] mode.
pub fn set_highlighter(
&mut self,
new_language: impl Into<SharedString>,
cx: &mut Context<Self>,
) {
match &mut self.mode {
InputMode::CodeEditor {
language,
highlighter,
..
} => {
*language = new_language.into();
*highlighter.borrow_mut() = None;
}
_ => {}
}
cx.notify();
}
fn reset_highlighter(&mut self, cx: &mut Context<Self>) {
match &mut self.mode {
InputMode::CodeEditor { highlighter, .. } => {
*highlighter.borrow_mut() = None;
}
_ => {}
}
cx.notify();
}
/// Set markers, only for [`InputMode::CodeEditor`] mode.
///
/// For example to set the diagnostic markers in the code editor.
pub fn set_markers(&mut self, markers: Vec<Marker>, _: &mut Window, _: &mut Context<Self>) {
let mut markers = markers;
for marker in &mut markers {
marker.prepare(self);
}
self.mode.set_markers(markers);
}
/// Set placeholder
pub fn set_placeholder(
&mut self,
placeholder: impl Into<SharedString>,
_: &mut Window,
cx: &mut Context<Self>,
) {
self.placeholder = placeholder.into();
cx.notify();
}
/// Called after moving the cursor. Updates preferred_column if we know where the cursor now is.
fn update_preferred_column(&mut self) {
let column_ix = self.text.offset_to_point(self.cursor()).column;
self.preferred_column = Some(column_ix as usize);
}
/// Find which line and sub-line the given offset belongs to, along with the position within that sub-line.
///
/// Returns:
///
/// - The index of the line (zero-based) containing the offset.
/// - The index of the sub-line (zero-based) within the line containing the offset.
/// - The position of the offset.
pub(super) fn line_and_position_for_offset(
&self,
offset: usize,
) -> (usize, usize, Option<Point<Pixels>>) {
let Some(last_layout) = &self.last_layout else {
return (0, 0, None);
};
let line_height = last_layout.line_height;
let mut prev_lines_offset = last_layout.visible_start_offset;
let mut y_offset = last_layout.visible_top;
for (line_index, line) in last_layout.lines.iter().enumerate() {
let local_offset = offset.saturating_sub(prev_lines_offset);
if let Some(pos) = line.position_for_index(local_offset, line_height) {
let sub_line_index = (pos.y.0 / line_height.0) as usize;
let adjusted_pos = point(pos.x, pos.y + y_offset);
return (line_index, sub_line_index, Some(adjusted_pos));
}
y_offset += line.size(line_height).height;
prev_lines_offset += line.len() + 1;
}
(0, 0, None)
}
/// Move the cursor vertically by one line (up or down) while preserving the column if possible.
///
/// move_lines: Number of lines to move vertically (positive for down, negative for up).
fn move_vertical(&mut self, move_lines: isize, window: &mut Window, cx: &mut Context<Self>) {
if self.mode.is_single_line() {
return;
}
let offset = self.cursor();
let was_preferred_column = self.preferred_column;
let row = self.text.offset_to_point(offset).row;
let new_row = row.saturating_add_signed(move_lines as i32);
let line = self.text.line(new_row as usize);
let line_start_offset = self.text.point_to_offset(rope::Point::new(new_row, 0));
let new_column = self.preferred_column.unwrap_or_default().min(line.len());
let new_offset = line_start_offset + new_column;
self.pause_blink_cursor(cx);
self.move_to(new_offset, window, cx);
// Set back the preferred_x_offset
self.preferred_column = was_preferred_column;
cx.notify();
}
/// Set the text of the input field.
///
/// And the selection_range will be reset to 0..0.
pub fn set_value(
&mut self,
value: impl Into<SharedString>,
window: &mut Window,
cx: &mut Context<Self>,
) {
self.history.ignore = true;
let was_disabled = self.disabled;
self.replace_text(value, window, cx);
self.disabled = was_disabled;
self.history.ignore = false;
// Ensure cursor to start when set text
if self.mode.is_single_line() {
self.selected_range = (self.text.len()..self.text.len()).into();
} else {
self.selected_range.clear();
}
// Move scroll to top
self.scroll_handle.set_offset(point(px(0.), px(0.)));
cx.notify();
}
/// Insert text at the current cursor position.
///
/// And the cursor will be moved to the end of inserted text.
pub fn insert(
&mut self,
text: impl Into<SharedString>,
window: &mut Window,
cx: &mut Context<Self>,
) {
let text: SharedString = text.into();
let range_utf16 = self.range_to_utf16(&(self.cursor()..self.cursor()));
self.replace_text_in_range(Some(range_utf16), &text, window, cx);
self.selected_range = (self.selected_range.end..self.selected_range.end).into();
}
/// Replace text at the current cursor position.
///
/// And the cursor will be moved to the end of replaced text.
pub fn replace(
&mut self,
text: impl Into<SharedString>,
window: &mut Window,
cx: &mut Context<Self>,
) {
let text: SharedString = text.into();
self.replace_text_in_range(None, &text, window, cx);
self.selected_range = (self.selected_range.end..self.selected_range.end).into();
}
fn replace_text(
&mut self,
text: impl Into<SharedString>,
window: &mut Window,
cx: &mut Context<Self>,
) {
let text: SharedString = text.into();
let range = 0..self.text.chars().map(|c| c.len_utf16()).sum();
self.replace_text_in_range(Some(range), &text, window, cx);
self.reset_highlighter(cx);
}
/// Set with disabled mode.
///
/// See also: [`Self::set_disabled`], [`Self::is_disabled`].
#[allow(unused)]
pub(crate) fn disabled(mut self, disabled: bool) -> Self {
self.disabled = disabled;
self
}
/// Set with password masked state.
pub fn masked(mut self, masked: bool) -> Self {
self.masked = masked;
self
}
/// Set the password masked state of the input field.
pub fn set_masked(&mut self, masked: bool, _: &mut Window, cx: &mut Context<Self>) {
self.masked = masked;
cx.notify();
}
/// Set true to clear the input by pressing Escape key.
pub fn clean_on_escape(mut self) -> Self {
self.clean_on_escape = true;
self
}
/// Set the soft wrap mode for multi-line input, default is true.
pub fn soft_wrap(mut self, wrap: bool) -> Self {
self.soft_wrap = wrap;
self
}
/// Update the soft wrap mode for multi-line input, default is true.
pub fn set_soft_wrap(&mut self, wrap: bool, _: &mut Window, cx: &mut Context<Self>) {
self.soft_wrap = wrap;
if wrap {
let wrap_width = self
.last_layout
.as_ref()
.and_then(|b| b.wrap_width)
.unwrap_or(self.input_bounds.size.width);
self.text_wrapper.set_wrap_width(Some(wrap_width), cx);
} else {
self.text_wrapper.set_wrap_width(None, cx);
}
cx.notify();
}
/// Set the regular expression pattern of the input field.
pub fn pattern(mut self, pattern: regex::Regex) -> Self {
self.pattern = Some(pattern);
self
}
/// Set the regular expression pattern of the input field with reference.
pub fn set_pattern(
&mut self,
pattern: regex::Regex,
_window: &mut Window,
_cx: &mut Context<Self>,
) {
self.pattern = Some(pattern);
}
/// Set the validation function of the input field.
pub fn validate(mut self, f: impl Fn(&str, &mut Context<Self>) -> bool + 'static) -> Self {
self.validate = Some(Box::new(f));
self
}
/// Set true to show indicator at the input right.
pub fn set_loading(&mut self, loading: bool, _: &mut Window, cx: &mut Context<Self>) {
self.loading = loading;
cx.notify();
}
/// Set the default value of the input field.
pub fn default_value(mut self, value: impl Into<SharedString>) -> Self {
let text: SharedString = value.into();
self.text = Rope::from(text.as_str());
self.text_wrapper.text = self.text.clone();
self
}
/// Return the value of the input field.
pub fn value(&self) -> SharedString {
SharedString::new(self.text.to_string())
}
/// Return the value without mask.
pub fn unmask_value(&self) -> SharedString {
self.mask_pattern.unmask(&self.text.to_string()).into()
}
/// Return the (1-based) line and column of the cursor.
pub fn line_column(&self) -> LineColumn {
let offset = self.cursor();
let point = self.text.offset_to_point(offset);
LineColumn {
line: point.row as usize + 1,
column: point.column as usize + 1,
}
}
/// Set (1-based) line and column of the cursor.
///
/// This will move the cursor to the specified line and column, and update the selection range.
///
/// - The `column` is optional, if it is `None`, it will return the start of the line.
/// - If the `line` is 0, it will return 0.
/// - If the `line` is greater than the number of lines, it will return
/// the length of the text.
///
/// Ignore, if the line, column is invalid.
pub fn go_to_line(
&mut self,
line: usize,
column: Option<usize>,
window: &mut Window,
cx: &mut Context<Self>,
) {
let max_point = self.text.max_point();
let row = line.saturating_sub(1).min(max_point.row as usize);
let col = column
.unwrap_or(1)
.saturating_sub(1)
.min(self.text.line_len(row as u32) as usize);
let offset = self
.text
.point_to_offset(rope::Point::new(row as u32, col as u32));
// TODO: Scroll to make the row in center of viewport.
self.move_to(offset, window, cx);
self.update_preferred_column();
self.focus(window, cx);
}
/// Focus the input field.
pub fn focus(&self, window: &mut Window, _: &mut Context<Self>) {
self.focus_handle.focus(window);
}
pub(super) fn left(&mut self, _: &MoveLeft, window: &mut Window, cx: &mut Context<Self>) {
self.pause_blink_cursor(cx);
if self.selected_range.is_empty() {
self.move_to(self.previous_boundary(self.cursor()), window, cx);
} else {
self.move_to(self.selected_range.start, window, cx)
}
}
pub(super) fn right(&mut self, _: &MoveRight, window: &mut Window, cx: &mut Context<Self>) {
self.pause_blink_cursor(cx);
if self.selected_range.is_empty() {
self.move_to(self.next_boundary(self.selected_range.end), window, cx);
} else {
self.move_to(self.selected_range.end, window, cx)
}
}
pub(super) fn up(&mut self, _: &MoveUp, window: &mut Window, cx: &mut Context<Self>) {
if self.mode.is_single_line() {
return;
}
if !self.selected_range.is_empty() {
self.move_to(
self.previous_boundary(self.selected_range.start.saturating_sub(1)),
window,
cx,
);
}
self.pause_blink_cursor(cx);
self.move_vertical(-1, window, cx);
}
pub(super) fn down(&mut self, _: &MoveDown, window: &mut Window, cx: &mut Context<Self>) {
if self.mode.is_single_line() {
return;
}
if !self.selected_range.is_empty() {
self.move_to(
self.next_boundary(self.selected_range.end.saturating_sub(1)),
window,
cx,
);
}
self.pause_blink_cursor(cx);
self.move_vertical(1, window, cx);
}
pub(super) fn page_up(&mut self, _: &MovePageUp, window: &mut Window, cx: &mut Context<Self>) {
if self.mode.is_single_line() {
return;
}
let Some(last_layout) = &self.last_layout else {
return;
};
let display_lines = (self.input_bounds.size.height / last_layout.line_height) as isize;
self.move_vertical(-display_lines, window, cx);
}
pub(super) fn page_down(
&mut self,
_: &MovePageDown,
window: &mut Window,
cx: &mut Context<Self>,
) {
if self.mode.is_single_line() {
return;
}
let Some(last_layout) = &self.last_layout else {
return;
};
let display_lines = (self.input_bounds.size.height / last_layout.line_height) as isize;
self.move_vertical(display_lines, window, cx);
}
pub(super) fn select_left(
&mut self,
_: &SelectLeft,
window: &mut Window,
cx: &mut Context<Self>,
) {
self.select_to(self.previous_boundary(self.cursor()), window, cx);
}
pub(super) fn select_right(
&mut self,
_: &SelectRight,
window: &mut Window,
cx: &mut Context<Self>,
) {
self.select_to(self.next_boundary(self.cursor()), window, cx);
}
pub(super) fn select_up(&mut self, _: &SelectUp, window: &mut Window, cx: &mut Context<Self>) {
if self.mode.is_single_line() {
return;
}
let offset = self.start_of_line().saturating_sub(1);
self.select_to(self.previous_boundary(offset), window, cx);
}
pub(super) fn select_down(
&mut self,
_: &SelectDown,
window: &mut Window,
cx: &mut Context<Self>,
) {
if self.mode.is_single_line() {
return;
}
let offset = (self.end_of_line() + 1).min(self.text.len());
self.select_to(self.next_boundary(offset), window, cx);
}
pub(super) fn select_all(
&mut self,
_: &SelectAll,
window: &mut Window,
cx: &mut Context<Self>,
) {
self.move_to(0, window, cx);
self.select_to(self.text.len(), window, cx)
}
pub(super) fn home(&mut self, _: &MoveHome, window: &mut Window, cx: &mut Context<Self>) {
self.pause_blink_cursor(cx);
let offset = self.start_of_line();
self.move_to(offset, window, cx);
}
pub(super) fn end(&mut self, _: &MoveEnd, window: &mut Window, cx: &mut Context<Self>) {
self.pause_blink_cursor(cx);
let offset = self.end_of_line();
self.move_to(offset, window, cx);
}
pub(super) fn move_to_start(
&mut self,
_: &MoveToStart,
window: &mut Window,
cx: &mut Context<Self>,
) {
self.move_to(0, window, cx);
}
pub(super) fn move_to_end(
&mut self,
_: &MoveToEnd,
window: &mut Window,
cx: &mut Context<Self>,
) {
self.move_to(self.text.len(), window, cx);
}
pub(super) fn move_to_previous_word(
&mut self,
_: &MoveToPreviousWord,
window: &mut Window,
cx: &mut Context<Self>,
) {
let offset = self.previous_start_of_word();
self.move_to(offset, window, cx);
}
pub(super) fn move_to_next_word(
&mut self,
_: &MoveToNextWord,
window: &mut Window,
cx: &mut Context<Self>,
) {
let offset = self.next_end_of_word();
self.move_to(offset, window, cx);
}
pub(super) fn select_to_start(
&mut self,
_: &SelectToStart,
window: &mut Window,
cx: &mut Context<Self>,
) {
self.select_to(0, window, cx);
}
pub(super) fn select_to_end(
&mut self,
_: &SelectToEnd,
window: &mut Window,
cx: &mut Context<Self>,
) {
let end = self.text.len();
self.select_to(end, window, cx);
}
pub(super) fn select_to_start_of_line(
&mut self,
_: &SelectToStartOfLine,
window: &mut Window,
cx: &mut Context<Self>,
) {
let offset = self.start_of_line();
self.select_to(offset, window, cx);
}
pub(super) fn select_to_end_of_line(
&mut self,
_: &SelectToEndOfLine,
window: &mut Window,
cx: &mut Context<Self>,
) {
let offset = self.end_of_line();
self.select_to(offset, window, cx);
}
pub(super) fn select_to_previous_word(
&mut self,
_: &SelectToPreviousWordStart,
window: &mut Window,
cx: &mut Context<Self>,
) {
let offset = self.previous_start_of_word();
self.select_to(offset, window, cx);
}
pub(super) fn select_to_next_word(
&mut self,
_: &SelectToNextWordEnd,
window: &mut Window,
cx: &mut Context<Self>,
) {
let offset = self.next_end_of_word();
self.select_to(offset, window, cx);
}
/// Return the start offset of the previous word.
fn previous_start_of_word(&mut self) -> usize {
let offset = self.selected_range.start;
// FIXME: Avoid to_string
let left_part = self.text.slice(0..offset).to_string();
UnicodeSegmentation::split_word_bound_indices(left_part.as_str())
.filter(|(_, s)| !s.trim_start().is_empty())
.next_back()
.map(|(i, _)| i)
.unwrap_or(0)
}
/// Return the next end offset of the next word.
fn next_end_of_word(&mut self) -> usize {
let offset = self.cursor();
let right_part = self.text.slice(offset..self.text.len()).to_string();
UnicodeSegmentation::split_word_bound_indices(right_part.as_str())
.find(|(_, s)| !s.trim_start().is_empty())
.map(|(i, s)| offset + i + s.len())
.unwrap_or(self.text.len())
}
/// Get start of line byte offset of cursor
fn start_of_line(&self) -> usize {
if self.mode.is_single_line() {
return 0;
}
let row = self.text.offset_to_point(self.cursor()).row;
self.text.line_start_offset(row as usize)
}
/// Get end of line byte offset of cursor
fn end_of_line(&self) -> usize {
if self.mode.is_single_line() {
return self.text.len();
}
let row = self.text.offset_to_point(self.cursor()).row;
self.text.line_end_offset(row as usize)
}
/// Get start line of selection start or end (The min value).
///
/// This is means is always get the first line of selection.
fn start_of_line_of_selection(&mut self, window: &mut Window, cx: &mut Context<Self>) -> usize {
if self.mode.is_single_line() {
return 0;
}
let mut offset =
self.previous_boundary(self.selected_range.start.min(self.selected_range.end));
if self.text.char_at(offset) == Some('\r') {
offset += 1;
}
let line = self
.text_for_range(self.range_to_utf16(&(0..offset + 1)), &mut None, window, cx)
.unwrap_or_default()
.rfind('\n')
.map(|i| i + 1)
.unwrap_or(0);
line
}
/// Get indent string of next line.
///
/// To get current and next line indent, to return more depth one.
pub(super) fn indent_of_next_line(&mut self) -> String {
if self.mode.is_single_line() {
return "".into();
}
let mut current_indent = String::new();
let mut next_indent = String::new();
let current_line_start_pos = self.start_of_line();
let next_line_start_pos = self.end_of_line();
for c in self.text.chars().skip(current_line_start_pos) {
if !c.is_whitespace() {
break;
}
if c == '\n' || c == '\r' {
break;
}
current_indent.push(c);
}
for c in self.text.chars().skip(next_line_start_pos) {
if !c.is_whitespace() {
break;
}
if c == '\n' || c == '\r' {
break;
}
next_indent.push(c);
}
if next_indent.len() > current_indent.len() {
return next_indent;
} else {
return current_indent;
}
}
pub(super) fn backspace(&mut self, _: &Backspace, window: &mut Window, cx: &mut Context<Self>) {
if self.selected_range.is_empty() {
self.select_to(self.previous_boundary(self.cursor()), window, cx)
}
self.replace_text_in_range(None, "", window, cx);
self.pause_blink_cursor(cx);
}
pub(super) fn delete(&mut self, _: &Delete, window: &mut Window, cx: &mut Context<Self>) {
if self.selected_range.is_empty() {
self.select_to(self.next_boundary(self.cursor()), window, cx)
}
self.replace_text_in_range(None, "", window, cx);
self.pause_blink_cursor(cx);
}
pub(super) fn delete_to_beginning_of_line(
&mut self,
_: &DeleteToBeginningOfLine,
window: &mut Window,
cx: &mut Context<Self>,
) {
let mut offset = self.start_of_line();
if offset == self.cursor() {
offset = offset.saturating_sub(1);
}
self.replace_text_in_range(
Some(self.range_to_utf16(&(offset..self.cursor()))),
"",
window,
cx,
);
self.pause_blink_cursor(cx);
}
pub(super) fn delete_to_end_of_line(
&mut self,
_: &DeleteToEndOfLine,
window: &mut Window,
cx: &mut Context<Self>,
) {
let mut offset = self.end_of_line();
if offset == self.cursor() {
offset = (offset + 1).clamp(0, self.text.len());
}
self.replace_text_in_range(
Some(self.range_to_utf16(&(self.cursor()..offset))),
"",
window,
cx,
);
self.pause_blink_cursor(cx);
}
pub(super) fn delete_previous_word(
&mut self,
_: &DeleteToPreviousWordStart,
window: &mut Window,
cx: &mut Context<Self>,
) {
let offset = self.previous_start_of_word();
self.replace_text_in_range(
Some(self.range_to_utf16(&(offset..self.cursor()))),
"",
window,
cx,
);
self.pause_blink_cursor(cx);
}
pub(super) fn delete_next_word(
&mut self,
_: &DeleteToNextWordEnd,
window: &mut Window,
cx: &mut Context<Self>,
) {
let offset = self.next_end_of_word();
self.replace_text_in_range(
Some(self.range_to_utf16(&(self.cursor()..offset))),
"",
window,
cx,
);
self.pause_blink_cursor(cx);
}
pub(super) fn enter(&mut self, action: &Enter, window: &mut Window, cx: &mut Context<Self>) {
if self.mode.is_multi_line() {
// Get current line indent
let indent = if self.mode.is_code_editor() {
self.indent_of_next_line()
} else {
"".to_string()
};
// Add newline and indent
let new_line_text = format!("\n{}", indent);
self.replace_text_in_range(None, &new_line_text, window, cx);
} else {
// Single line input, just emit the event (e.g.: In a modal dialog to confirm).
cx.propagate();
}
cx.emit(InputEvent::PressEnter {
secondary: action.secondary,
});
}
pub(super) fn indent_inline(
&mut self,
_: &IndentInline,
window: &mut Window,
cx: &mut Context<Self>,
) {
self.indent(false, window, cx);
}
pub(super) fn indent_block(&mut self, _: &Indent, window: &mut Window, cx: &mut Context<Self>) {
self.indent(true, window, cx);
}
pub(super) fn outdent_inline(
&mut self,
_: &OutdentInline,
window: &mut Window,
cx: &mut Context<Self>,
) {
self.outdent(false, window, cx);
}
pub(super) fn outdent_block(
&mut self,
_: &Outdent,
window: &mut Window,
cx: &mut Context<Self>,
) {
self.outdent(true, window, cx);
}
pub(super) fn indent(&mut self, block: bool, window: &mut Window, cx: &mut Context<Self>) {
let Some(tab_size) = self.mode.tab_size() else {
return;
};
let tab_indent = tab_size.to_string();
let selected_range = self.selected_range;
let mut added_len = 0;
let is_selected = !self.selected_range.is_empty();
if is_selected || block {
let start_offset = self.start_of_line_of_selection(window, cx);
let mut offset = start_offset;
let selected_text = self
.text_for_range(
self.range_to_utf16(&(offset..selected_range.end)),
&mut None,
window,
cx,
)
.unwrap_or("".into());
for line in selected_text.split('\n') {
self.replace_text_in_range(
Some(self.range_to_utf16(&(offset..offset))),
&tab_indent,
window,
cx,
);
added_len += tab_indent.len();
// +1 for "\n", the `\r` is included in the `line`.
offset += line.len() + tab_indent.len() + 1;
}
if is_selected {
self.selected_range = (start_offset..selected_range.end + added_len).into();
} else {
self.selected_range =
(selected_range.start + added_len..selected_range.end + added_len).into();
}
} else {
// Selected none
let offset = self.selected_range.start;
self.replace_text_in_range(
Some(self.range_to_utf16(&(offset..offset))),
&tab_indent,
window,
cx,
);
added_len = tab_indent.len();
self.selected_range =
(selected_range.start + added_len..selected_range.end + added_len).into();
}
}
pub(super) fn outdent(&mut self, block: bool, window: &mut Window, cx: &mut Context<Self>) {
let Some(tab_size) = self.mode.tab_size() else {
return;
};
let tab_indent = tab_size.to_string();
let selected_range = self.selected_range;
let mut removed_len = 0;
let is_selected = !self.selected_range.is_empty();
if is_selected || block {
let start_offset = self.start_of_line_of_selection(window, cx);
let mut offset = start_offset;
let selected_text = self
.text_for_range(
self.range_to_utf16(&(offset..selected_range.end)),
&mut None,
window,
cx,
)
.unwrap_or("".into());
for line in selected_text.split('\n') {
if line.starts_with(tab_indent.as_ref()) {
self.replace_text_in_range(
Some(self.range_to_utf16(&(offset..offset + tab_indent.len()))),
"",
window,
cx,
);
removed_len += tab_indent.len();
// +1 for "\n"
offset += line.len().saturating_sub(tab_indent.len()) + 1;
} else {
offset += line.len() + 1;
}
}
if is_selected {
self.selected_range =
(start_offset..selected_range.end.saturating_sub(removed_len)).into();
} else {
self.selected_range = (selected_range.start.saturating_sub(removed_len)
..selected_range.end.saturating_sub(removed_len))
.into();
}
} else {
// Selected none
let start_offset = self.selected_range.start;
let offset = self.start_of_line_of_selection(window, cx);
// FIXME: To improve performance
if self
.text
.slice(offset..self.text.len())
.to_string()
.starts_with(tab_indent.as_ref())
{
self.replace_text_in_range(
Some(self.range_to_utf16(&(offset..offset + tab_indent.len()))),
"",
window,
cx,
);
removed_len = tab_indent.len();
let new_offset = start_offset.saturating_sub(removed_len);
self.selected_range = (new_offset..new_offset).into();
}
}
}
pub(super) fn clean(&mut self, window: &mut Window, cx: &mut Context<Self>) {
self.replace_text("", window, cx);
}
pub(super) fn escape(&mut self, _: &Escape, window: &mut Window, cx: &mut Context<Self>) {
if self.marked_range.is_some() {
self.unmark_text(window, cx);
}
if self.clean_on_escape {
return self.clean(window, cx);
}
cx.propagate();
}
pub(super) fn on_mouse_down(
&mut self,
event: &MouseDownEvent,
window: &mut Window,
cx: &mut Context<Self>,
) {
// If there have IME marked range and is empty (Means pressed Esc to abort IME typing)
// Clear the marked range.
if let Some(marked_range) = &self.marked_range {
if marked_range.len() == 0 {
self.marked_range = None;
}
}
self.selecting = true;
let offset = self.index_for_mouse_position(event.position, window, cx);
// Double click to select word
if event.button == MouseButton::Left && event.click_count == 2 {
self.select_word(offset, window, cx);
return;
}
if event.modifiers.shift {
self.select_to(offset, window, cx);
} else {
self.move_to(offset, window, cx)
}
}
pub(super) fn on_mouse_up(
&mut self,
_: &MouseUpEvent,
_window: &mut Window,
_cx: &mut Context<Self>,
) {
self.selecting = false;
self.selected_word_range = None;
}
pub(super) fn on_mouse_move(
&mut self,
event: &MouseMoveEvent,
window: &mut Window,
cx: &mut Context<Self>,
) {
if self.mode.is_code_editor() {
// Show diagnostic popover on mouse move
let offset = self.index_for_mouse_position(event.position, window, cx);
if let Some(marker) = self.mode.marker_for_offset(offset) {
if let Some(diagnostic_popover) = self.diagnostic_popover.as_ref() {
if diagnostic_popover.read(cx).marker.range == marker.range {
diagnostic_popover.update(cx, |this, cx| {
this.show(cx);
});
return;
}
}
self.diagnostic_popover = Some(DiagnosticPopover::new(marker, cx.entity(), cx));
cx.notify();
} else {
if let Some(diagnostic_popover) = self.diagnostic_popover.as_mut() {
diagnostic_popover.update(cx, |this, cx| {
this.check_to_hide(event.position, cx);
})
}
}
}
}
pub(super) fn on_scroll_wheel(
&mut self,
event: &ScrollWheelEvent,
window: &mut Window,
cx: &mut Context<Self>,
) {
let line_height = self
.last_layout
.as_ref()
.map(|layout| layout.line_height)
.unwrap_or(window.line_height());
let delta = event.delta.pixel_delta(line_height);
self.update_scroll_offset(Some(self.scroll_handle.offset() + delta), cx);
self.diagnostic_popover = None;
}
fn update_scroll_offset(&mut self, offset: Option<Point<Pixels>>, cx: &mut Context<Self>) {
let mut offset = offset.unwrap_or(self.scroll_handle.offset());
let safe_y_range =
(-self.scroll_size.height + self.input_bounds.size.height).min(px(0.0))..px(0.);
let safe_x_range =
(-self.scroll_size.width + self.input_bounds.size.width).min(px(0.0))..px(0.);
offset.y = offset.y.clamp(safe_y_range.start, safe_y_range.end);
offset.x = offset.x.clamp(safe_x_range.start, safe_x_range.end);
self.scroll_handle.set_offset(offset);
cx.notify();
}
pub(super) fn show_character_palette(
&mut self,
_: &ShowCharacterPalette,
window: &mut Window,
_: &mut Context<Self>,
) {
window.show_character_palette();
}
pub(super) fn copy(&mut self, _: &Copy, _: &mut Window, cx: &mut Context<Self>) {
if self.selected_range.is_empty() {
return;
}
let selected_text = self.text.slice(self.selected_range.into()).to_string();
cx.write_to_clipboard(ClipboardItem::new_string(selected_text));
}
pub(super) fn cut(&mut self, _: &Cut, window: &mut Window, cx: &mut Context<Self>) {
if self.selected_range.is_empty() {
return;
}
let selected_text = self.text.slice(self.selected_range.into()).to_string();
cx.write_to_clipboard(ClipboardItem::new_string(selected_text));
self.replace_text_in_range(None, "", window, cx);
}
pub(super) fn paste(&mut self, _: &Paste, window: &mut Window, cx: &mut Context<Self>) {
if let Some(clipboard) = cx.read_from_clipboard() {
let mut new_text = clipboard.text().unwrap_or_default();
if !self.mode.is_multi_line() {
new_text = new_text.replace('\n', "");
}
self.replace_text_in_range(None, &new_text, window, cx);
}
}
fn push_history(&mut self, text: &Rope, range: &Range<usize>, new_text: &str) {
if self.history.ignore {
return;
}
let old_text = text.slice(range.clone()).to_string();
let new_range = range.start..range.start + new_text.len();
self.history
.push(Change::new(range.clone(), &old_text, new_range, new_text));
}
pub(super) fn undo(&mut self, _: &Undo, window: &mut Window, cx: &mut Context<Self>) {
self.history.ignore = true;
if let Some(changes) = self.history.undo() {
for change in changes {
let range_utf16 = self.range_to_utf16(&change.new_range.into());
self.replace_text_in_range(Some(range_utf16), &change.old_text, window, cx);
}
}
self.history.ignore = false;
}
pub(super) fn redo(&mut self, _: &Redo, window: &mut Window, cx: &mut Context<Self>) {
self.history.ignore = true;
if let Some(changes) = self.history.redo() {
for change in changes {
let range_utf16 = self.range_to_utf16(&change.old_range.into());
self.replace_text_in_range(Some(range_utf16), &change.new_text, window, cx);
}
}
self.history.ignore = false;
}
/// Move the cursor to the given offset.
///
/// The offset is the UTF-8 offset.
///
/// Ensure the offset use self.next_boundary or self.previous_boundary to get the correct offset.
fn move_to(&mut self, offset: usize, _: &mut Window, cx: &mut Context<Self>) {
let offset = offset.clamp(0, self.text.len());
self.selected_range = (offset..offset).into();
self.pause_blink_cursor(cx);
self.update_preferred_column();
cx.notify()
}
/// Get byte offset of the cursor.
///
/// The offset is the UTF-8 offset.
pub fn cursor(&self) -> usize {
if let Some(marked_range) = &self.marked_range {
return marked_range.end;
}
if self.selection_reversed {
self.selected_range.start
} else {
self.selected_range.end
}
}
fn index_for_mouse_position(
&self,
position: Point<Pixels>,
_window: &Window,
_cx: &App,
) -> usize {
// If the text is empty, always return 0
if self.text.len() == 0 {
return 0;
}
let (Some(bounds), Some(last_layout)) =
(self.last_bounds.as_ref(), self.last_layout.as_ref())
else {
return 0;
};
let line_height = last_layout.line_height;
let line_number_width = last_layout.line_number_width;
// TIP: About the IBeam cursor
//
// If cursor style is IBeam, the mouse mouse position is in the middle of the cursor (This is special in OS)
// The position is relative to the bounds of the text input
//
// bounds.origin:
//
// - included the input padding.
// - included the scroll offset.
let inner_position = position - bounds.origin - point(line_number_width, px(0.));
let mut index = last_layout.visible_start_offset;
let mut y_offset = last_layout.visible_top;
for (ix, line) in self
.text_wrapper
.lines
.iter()
.skip(last_layout.visible_range.start)
.enumerate()
{
let line_origin = self.line_origin_with_y_offset(&mut y_offset, line, line_height);
let pos = inner_position - line_origin;
let Some(rendered_line) = last_layout.lines.get(ix) else {
if pos.y < line_origin.y + line_height {
break;
}
continue;
};
// Return offset by use closest_index_for_x if is single line mode.
if self.mode.is_single_line() {
return rendered_line.unwrapped_layout.closest_index_for_x(pos.x);
}
let index_result = rendered_line.closest_index_for_position(pos, line_height);
if let Ok(v) = index_result {
index += v;
break;
} else if let Ok(_) =
rendered_line.index_for_position(point(px(0.), pos.y), line_height)
{
// Click in the this line but not in the text, move cursor to the end of the line.
// The fallback index is saved in Err from `index_for_position` method.
index += index_result.unwrap_err();
break;
} else if rendered_line.text.trim_end_matches(|c| c == '\r').len() == 0 {
// empty line on Windows is `\r`, other is ''
let line_bounds = Bounds {
origin: line_origin,
size: gpui::size(bounds.size.width, line_height),
};
let pos = inner_position;
index += rendered_line.len();
if line_bounds.contains(&pos) {
break;
}
} else {
index += rendered_line.len();
}
// +1 for revert `lines` split `\n`
index += 1;
}
if index > self.text.len() {
self.text.len()
} else {
index
}
}
/// Returns a y offsetted point for the line origin.
fn line_origin_with_y_offset(
&self,
y_offset: &mut Pixels,
line: &LineWrap,
line_height: Pixels,
) -> Point<Pixels> {
// NOTE: About line.wrap_boundaries.len()
//
// If only 1 line, the value is 0
// If have 2 line, the value is 1
if self.mode.is_multi_line() {
let p = point(px(0.), *y_offset);
let height = line_height + line.wrap_lines as f32 * line_height;
*y_offset = *y_offset + height;
p
} else {
point(px(0.), px(0.))
}
}
/// Select the text from the current cursor position to the given offset.
///
/// The offset is the UTF-8 offset.
///
/// Ensure the offset use self.next_boundary or self.previous_boundary to get the correct offset.
fn select_to(&mut self, offset: usize, _: &mut Window, cx: &mut Context<Self>) {
let offset = offset.clamp(0, self.text.len());
if self.selection_reversed {
self.selected_range.start = offset
} else {
self.selected_range.end = offset
};
if self.selected_range.end < self.selected_range.start {
self.selection_reversed = !self.selection_reversed;
self.selected_range = (self.selected_range.end..self.selected_range.start).into();
}
// Ensure keep word selected range
if let Some(word_range) = self.selected_word_range.as_ref() {
if self.selected_range.start > word_range.start {
self.selected_range.start = word_range.start;
}
if self.selected_range.end < word_range.end {
self.selected_range.end = word_range.end;
}
}
if self.selected_range.is_empty() {
self.update_preferred_column();
}
cx.notify()
}
/// Select the word at the given offset.
///
/// The offset is the UTF-8 offset.
///
/// FIXME: When click on a non-word character, the word is not selected.
fn select_word(&mut self, offset: usize, window: &mut Window, cx: &mut Context<Self>) {
#[inline(always)]
fn is_word(c: char) -> bool {
c.is_alphanumeric() || matches!(c, '_')
}
let mut start = offset;
let mut end = start;
let prev_text = self
.text_for_range(self.range_to_utf16(&(0..start)), &mut None, window, cx)
.unwrap_or_default();
let next_text = self
.text_for_range(
self.range_to_utf16(&(end..self.text.len())),
&mut None,
window,
cx,
)
.unwrap_or_default();
let prev_chars = prev_text.chars().rev();
let next_chars = next_text.chars();
let pre_chars_count = prev_chars.clone().count();
for (ix, c) in prev_chars.enumerate() {
if !is_word(c) {
break;
}
if ix < pre_chars_count {
start = start.saturating_sub(c.len_utf8());
}
}
for (_, c) in next_chars.enumerate() {
if !is_word(c) {
break;
}
end += c.len_utf8();
}
if start == end {
return;
}
self.selected_range = (start..end).into();
self.selected_word_range = Some(self.selected_range);
cx.notify()
}
/// Unselects the currently selected text.
pub fn unselect(&mut self, _: &mut Window, cx: &mut Context<Self>) {
let offset = self.cursor();
self.selected_range = (offset..offset).into();
cx.notify()
}
pub(super) fn offset_from_utf16(&self, offset: usize) -> usize {
let mut utf8_offset = 0;
let mut utf16_count = 0;
for ch in self.text.chars() {
if utf16_count >= offset {
break;
}
utf16_count += ch.len_utf16();
utf8_offset += ch.len_utf8();
}
utf8_offset
}
pub(super) fn offset_to_utf16(&self, offset: usize) -> usize {
let mut utf16_offset = 0;
let mut utf8_count = 0;
for ch in self.text.chars() {
if utf8_count >= offset {
break;
}
utf8_count += ch.len_utf8();
utf16_offset += ch.len_utf16();
}
utf16_offset
}
pub(super) fn range_to_utf16(&self, range: &Range<usize>) -> Range<usize> {
self.offset_to_utf16(range.start)..self.offset_to_utf16(range.end)
}
pub(super) fn range_from_utf16(&self, range_utf16: &Range<usize>) -> Range<usize> {
self.offset_from_utf16(range_utf16.start)..self.offset_from_utf16(range_utf16.end)
}
fn previous_boundary(&self, offset: usize) -> usize {
let mut offset = self.text.clip_offset(offset.saturating_sub(1), Bias::Left);
if let Some(ch) = self.text.char_at(offset) {
if ch == '\r' {
offset -= 1;
}
}
offset
}
fn next_boundary(&self, offset: usize) -> usize {
let mut offset = self.text.clip_offset(offset + 1, Bias::Right);
if let Some(ch) = self.text.char_at(offset) {
if ch == '\r' {
offset += 1;
}
}
offset
}
/// Returns the true to let InputElement to render cursor, when Input is focused and current BlinkCursor is visible.
pub(crate) fn show_cursor(&self, window: &Window, cx: &App) -> bool {
self.focus_handle.is_focused(window)
&& self.blink_cursor.read(cx).visible()
&& window.is_window_active()
}
fn on_focus(&mut self, _: &mut Window, cx: &mut Context<Self>) {
self.blink_cursor.update(cx, |cursor, cx| {
cursor.start(cx);
});
cx.emit(InputEvent::Focus);
}
fn on_blur(&mut self, window: &mut Window, cx: &mut Context<Self>) {
self.blink_cursor.update(cx, |cursor, cx| {
cursor.stop(cx);
});
Root::update(window, cx, |root, _, _| {
root.focused_input = None;
});
cx.emit(InputEvent::Blur);
}
fn pause_blink_cursor(&mut self, cx: &mut Context<Self>) {
self.blink_cursor.update(cx, |cursor, cx| {
cursor.pause(cx);
});
}
pub(super) fn on_key_down(&mut self, _: &KeyDownEvent, _: &mut Window, cx: &mut Context<Self>) {
self.pause_blink_cursor(cx);
}
pub(super) fn on_drag_move(
&mut self,
event: &MouseMoveEvent,
window: &mut Window,
cx: &mut Context<Self>,
) {
if self.text.len() == 0 {
return;
}
if self.last_layout.is_none() {
return;
}
if !self.focus_handle.is_focused(window) {
return;
}
if !self.selecting {
return;
}
let offset = self.index_for_mouse_position(event.position, window, cx);
self.select_to(offset, window, cx);
}
fn is_valid_input(&self, new_text: &str, cx: &mut Context<Self>) -> bool {
if new_text.is_empty() {
return true;
}
if let Some(validate) = &self.validate {
if !validate(new_text, cx) {
return false;
}
}
if !self.mask_pattern.is_valid(new_text) {
return false;
}
let Some(pattern) = &self.pattern else {
return true;
};
pattern.is_match(new_text)
}
/// Set the mask pattern for formatting the input text.
///
/// The pattern can contain:
/// - 9: Any digit or dot
/// - A: Any letter
/// - *: Any character
/// - Other characters will be treated as literal mask characters
///
/// Example: "(999)999-999" for phone numbers
pub fn mask_pattern(mut self, pattern: impl Into<MaskPattern>) -> Self {
self.mask_pattern = pattern.into();
if let Some(placeholder) = self.mask_pattern.placeholder() {
self.placeholder = placeholder.into();
}
self
}
pub fn set_mask_pattern(
&mut self,
pattern: impl Into<MaskPattern>,
_: &mut Window,
cx: &mut Context<Self>,
) {
self.mask_pattern = pattern.into();
if let Some(placeholder) = self.mask_pattern.placeholder() {
self.placeholder = placeholder.into();
}
cx.notify();
}
pub(super) fn set_input_bounds(&mut self, new_bounds: Bounds<Pixels>, cx: &mut Context<Self>) {
let wrap_width_changed = self.input_bounds.size.width != new_bounds.size.width;
self.input_bounds = new_bounds;
// Update text_wrapper wrap_width if changed.
if let Some(last_layout) = self.last_layout.as_ref() {
if wrap_width_changed {
let wrap_width = if !self.soft_wrap {
// None to disable wrapping (will use Pixels::MAX)
None
} else {
last_layout.wrap_width
};
self.text_wrapper.set_wrap_width(wrap_width, cx);
self.mode.update_auto_grow(&self.text_wrapper);
cx.notify();
}
}
}
}
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 = self.range_from_utf16(&range_utf16);
adjusted_range.replace(self.range_to_utf16(&range));
Some(self.text.slice(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: self.range_to_utf16(&self.selected_range.into()),
reversed: false,
})
}
fn marked_text_range(
&self,
_window: &mut Window,
_cx: &mut Context<Self>,
) -> Option<Range<usize>> {
self.marked_range
.map(|range| self.range_to_utf16(&range.into()))
}
fn unmark_text(&mut self, _window: &mut Window, _cx: &mut Context<Self>) {
self.marked_range = None;
}
/// Replace text in range.
///
/// - If the new text is invalid, it will not be replaced.
/// - If `range_utf16` is not provided, the current selected range will be used.
fn replace_text_in_range(
&mut self,
range_utf16: Option<Range<usize>>,
new_text: &str,
_: &mut Window,
cx: &mut Context<Self>,
) {
if self.disabled {
return;
}
let range = range_utf16
.as_ref()
.map(|range_utf16| self.range_from_utf16(range_utf16))
.or(self.marked_range.map(|range| range.into()))
.unwrap_or(self.selected_range.into());
let old_text = self.text.clone();
self.text.replace(range.clone(), new_text);
let pending_text = self.text.to_string();
// Check if the new text is valid
if !self.is_valid_input(&pending_text, cx) {
self.text = old_text;
return;
}
let mut new_offset = (range.start + new_text.len()).min(self.text.len());
if !self.mask_pattern.is_none() {
let mask_text = self.mask_pattern.mask(&pending_text);
self.text = Rope::from(mask_text.as_str());
let new_text_len =
(new_text.len() + mask_text.len()).saturating_sub(pending_text.len());
new_offset = (range.start + new_text_len).min(mask_text.len());
}
self.push_history(&old_text, &range, &new_text);
self.mode.clear_markers();
self.text_wrapper.update(&self.text, false, cx);
self.mode
.update_highlighter(&range, &self.text, &new_text, true, cx);
self.selected_range = (new_offset..new_offset).into();
self.marked_range.take();
self.update_preferred_column();
self.update_scroll_offset(None, cx);
self.mode.update_auto_grow(&self.text_wrapper);
cx.emit(InputEvent::Change(self.unmask_value()));
cx.notify();
}
/// Mark text is the IME temporary insert on typing.
fn replace_and_mark_text_in_range(
&mut self,
range_utf16: Option<Range<usize>>,
new_text: &str,
new_selected_range_utf16: Option<Range<usize>>,
_: &mut Window,
cx: &mut Context<Self>,
) {
if self.disabled {
return;
}
let range = range_utf16
.as_ref()
.map(|range_utf16| self.range_from_utf16(range_utf16))
.or(self.marked_range.map(|range| range.into()))
.unwrap_or(self.selected_range.into());
let old_text = self.text.clone();
self.text.replace(range.clone(), new_text);
let pending_text = self.text.to_string();
if !self.is_valid_input(&pending_text, cx) {
self.text = old_text;
return;
}
self.push_history(&old_text, &range, new_text);
self.mode.clear_markers();
self.text_wrapper.update(&self.text, false, cx);
self.mode
.update_highlighter(&range, &self.text, &new_text, true, cx);
if new_text.is_empty() {
// Cancel selection, when cancel IME input.
self.selected_range = (range.start..range.start).into();
self.marked_range = None;
} else {
self.marked_range = Some((range.start..range.start + new_text.len()).into());
self.selected_range = new_selected_range_utf16
.as_ref()
.map(|range_utf16| self.range_from_utf16(range_utf16))
.map(|new_range| new_range.start + range.start..new_range.end + range.end)
.unwrap_or_else(|| range.start + new_text.len()..range.start + new_text.len())
.into();
}
self.mode.update_auto_grow(&self.text_wrapper);
cx.emit(InputEvent::Change(self.unmask_value()));
cx.notify();
}
/// Used to position IME candidates.
fn bounds_for_range(
&mut self,
range_utf16: Range<usize>,
bounds: Bounds<Pixels>,
_window: &mut Window,
_cx: &mut Context<Self>,
) -> Option<Bounds<Pixels>> {
let last_layout = self.last_layout.as_ref()?;
let line_height = last_layout.line_height;
let line_number_width = last_layout.line_number_width;
let range = self.range_from_utf16(&range_utf16);
let mut start_origin = None;
let mut end_origin = None;
let line_number_origin = point(line_number_width, px(0.));
let mut y_offset = last_layout.visible_top;
let mut index_offset = last_layout.visible_start_offset;
for line in last_layout.lines.iter() {
if start_origin.is_some() && end_origin.is_some() {
break;
}
if start_origin.is_none() {
if let Some(p) =
line.position_for_index(range.start.saturating_sub(index_offset), line_height)
{
start_origin = Some(p + point(px(0.), y_offset));
}
}
if end_origin.is_none() {
if let Some(p) =
line.position_for_index(range.end.saturating_sub(index_offset), line_height)
{
end_origin = Some(p + point(px(0.), y_offset));
}
}
index_offset += line.len() + 1;
y_offset += line.size(line_height).height;
}
let start_origin = start_origin.unwrap_or_default();
let mut end_origin = end_origin.unwrap_or_default();
// Ensure at same line.
end_origin.y = start_origin.y;
Some(Bounds::from_corners(
bounds.origin + line_number_origin + start_origin,
// + line_height for show IME panel under the cursor line.
bounds.origin + line_number_origin + point(end_origin.x, end_origin.y + line_height),
))
}
fn character_index_for_point(
&mut self,
point: gpui::Point<Pixels>,
_window: &mut Window,
_cx: &mut Context<Self>,
) -> Option<usize> {
let last_layout = self.last_layout.as_ref()?;
let line_height = last_layout.line_height;
let line_point = self.last_bounds?.localize(&point)?;
let offset = last_layout.visible_start_offset;
for line in last_layout.lines.iter() {
if let Ok(utf8_index) = line.index_for_position(line_point, line_height) {
return Some(self.offset_to_utf16(offset + utf8_index));
}
}
None
}
}
impl Focusable for InputState {
fn focus_handle(&self, _cx: &App) -> FocusHandle {
self.focus_handle.clone()
}
}
impl Render for InputState {
fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
self.text_wrapper.update(&self.text, false, cx);
self.mode
.update_highlighter(&(0..0), &self.text, "", false, cx);
div()
.id("input-state")
.flex_1()
.when(self.mode.is_multi_line(), |this| this.h_full())
.flex_grow()
.overflow_x_hidden()
.child(TextElement::new(cx.entity().clone()).placeholder(self.placeholder.clone()))
.children(self.diagnostic_popover.clone())
}
}
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