diff options
Diffstat (limited to 'toolkit/crashreporter/client/app/src/ui/windows/mod.rs')
| -rw-r--r-- | toolkit/crashreporter/client/app/src/ui/windows/mod.rs | 949 |
1 files changed, 949 insertions, 0 deletions
diff --git a/toolkit/crashreporter/client/app/src/ui/windows/mod.rs b/toolkit/crashreporter/client/app/src/ui/windows/mod.rs new file mode 100644 index 0000000000..c2f396b80d --- /dev/null +++ b/toolkit/crashreporter/client/app/src/ui/windows/mod.rs @@ -0,0 +1,949 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +//! A UI using the windows API. +//! +//! This UI contains some edge cases that aren't implemented, for instance: +//! * there are a few cases where specific hierarchies are handled differently (e.g. a Button +//! containing Label, Scroll behavior, etc). +//! * not all controls handle all Property variants (e.g. Checkbox doesn't handle ReadOnly, TextBox +//! doesn't handle Binding, etc). +//! +//! The error handling is also a _little_ fast-and-loose, as many functions return an error value +//! that is acceptable to following logic (though it still would be a good idea to improve this). +//! +//! The rendering treats VBox, HBox, and Scroll as strictly layout-only: they do not create any +//! associated windows, and the layout logic handles their behavior. + +// Our windows-targets doesn't link uxtheme correctly for GetThemeSysFont/GetThemeSysColor. +// This was working in windows-sys 0.48. +#[link(name = "uxtheme", kind = "static")] +extern "C" {} + +use super::model::{self, Application, Element, ElementStyle, TypedElement}; +use crate::data::Property; +use font::Font; +use once_cell::sync::Lazy; +use quit_token::QuitToken; +use std::cell::RefCell; +use std::collections::HashMap; +use std::pin::Pin; +use std::rc::Rc; +use widestring::WideString; +use window::{CustomWindowClass, Window, WindowBuilder}; +use windows_sys::Win32::{ + Foundation::{HINSTANCE, HWND, LPARAM, LRESULT, RECT, WPARAM}, + Graphics::Gdi, + System::{LibraryLoader::GetModuleHandleW, SystemServices, Threading::GetCurrentThreadId}, + UI::{Controls, Input::KeyboardAndMouse, Shell, WindowsAndMessaging as win}, +}; + +macro_rules! success { + ( nonzero $e:expr ) => {{ + let value = $e; + assert_ne!(value, 0); + value + }}; + ( lasterror $e:expr ) => {{ + unsafe { windows_sys::Win32::Foundation::SetLastError(0) }; + let value = $e; + assert!(value != 0 || windows_sys::Win32::Foundation::GetLastError() == 0); + value + }}; + ( hresult $e:expr ) => { + assert_eq!($e, windows_sys::Win32::Foundation::S_OK); + }; + ( pointer $e:expr ) => {{ + let ptr = $e; + assert_ne!(ptr, 0); + ptr + }}; +} + +mod font; +mod gdi; +mod layout; +mod quit_token; +mod twoway; +mod widestring; +mod window; + +/// A Windows API UI implementation. +pub struct UI { + thread_id: u32, +} + +/// Custom user messages. +#[repr(u32)] +enum UserMessage { + Invoke = win::WM_USER, +} + +fn get_invoke(msg: &win::MSG) -> Option<Box<model::InvokeFn>> { + if msg.message == UserMessage::Invoke as u32 { + Some(unsafe { Box::from_raw(msg.lParam as *mut model::InvokeFn) }) + } else { + None + } +} + +impl UI { + pub fn run_loop(&self, app: Application) { + // Initialize common controls. + { + let icc = Controls::INITCOMMONCONTROLSEX { + dwSize: std::mem::size_of::<Controls::INITCOMMONCONTROLSEX>() as _, + // Buttons, edit controls, and static controls are all included in 'standard'. + dwICC: Controls::ICC_STANDARD_CLASSES | Controls::ICC_PROGRESS_CLASS, + }; + success!(nonzero unsafe { Controls::InitCommonControlsEx(&icc) }); + } + + // Enable font smoothing (per + // https://learn.microsoft.com/en-us/windows/win32/gdi/cleartype-antialiasing ). + unsafe { + // We don't check for failure on these, they are best-effort. + win::SystemParametersInfoW( + win::SPI_SETFONTSMOOTHING, + 1, + std::ptr::null_mut(), + win::SPIF_UPDATEINIFILE | win::SPIF_SENDCHANGE, + ); + win::SystemParametersInfoW( + win::SPI_SETFONTSMOOTHINGTYPE, + 0, + win::FE_FONTSMOOTHINGCLEARTYPE as _, + win::SPIF_UPDATEINIFILE | win::SPIF_SENDCHANGE, + ); + } + + // Enable correct layout direction. + if unsafe { win::SetProcessDefaultLayout(if app.rtl { Gdi::LAYOUT_RTL } else { 0 }) } == 0 { + log::warn!("failed to set process layout direction"); + } + + let module: HINSTANCE = unsafe { GetModuleHandleW(std::ptr::null()) }; + + // Register custom classes. + AppWindow::register(module).expect("failed to register AppWindow window class"); + + { + // The quit token is cloned for each top-level window and dropped at the end of this + // scope. + let quit_token = QuitToken::new(); + + for window in app.windows { + let name = WideString::new(window.element_type.title.as_str()); + let w = top_level_window( + module, + AppWindow::new( + WindowRenderer::new(module, window.element_type, &window.style), + Some(quit_token.clone()), + ), + &name, + &window.style, + ); + + unsafe { win::ShowWindow(w.handle, win::SW_NORMAL) }; + unsafe { Gdi::UpdateWindow(w.handle) }; + } + } + + // Run the event loop. + let mut msg = unsafe { std::mem::zeroed::<win::MSG>() }; + while unsafe { win::GetMessageW(&mut msg, 0, 0, 0) } > 0 { + if let Some(f) = get_invoke(&msg) { + f(); + continue; + } + + unsafe { + // IsDialogMessageW is necessary to handle niceties like tab navigation + if win::IsDialogMessageW(win::GetAncestor(msg.hwnd, win::GA_ROOT), &mut msg) == 0 { + win::TranslateMessage(&msg); + win::DispatchMessageW(&msg); + } + } + } + + // Flush queue to properly drop late invokes (this is a very unlikely case) + while unsafe { win::PeekMessageW(&mut msg, 0, 0, 0, win::PM_REMOVE) } > 0 { + if let Some(f) = get_invoke(&msg) { + drop(f); + } + } + } + + pub fn invoke(&self, f: model::InvokeFn) { + let ptr: *mut model::InvokeFn = Box::into_raw(Box::new(f)); + if unsafe { + win::PostThreadMessageW(self.thread_id, UserMessage::Invoke as u32, 0, ptr as _) + } == 0 + { + let _ = unsafe { Box::from_raw(ptr) }; + log::warn!("failed to invoke function on thread message queue"); + } + } +} + +impl Default for UI { + fn default() -> Self { + UI { + thread_id: unsafe { GetCurrentThreadId() }, + } + } +} + +/// A reference to an Element. +#[derive(PartialEq, Eq, Hash, Clone, Copy)] +struct ElementRef(*const Element); + +impl ElementRef { + pub fn new(element: &Element) -> Self { + ElementRef(element as *const Element) + } + + /// # Safety + /// You must ensure the reference is still valid. + pub unsafe fn get(&self) -> &Element { + &*self.0 + } +} + +// Equivalent of win32 HIWORD macro +fn hiword(v: u32) -> u16 { + (v >> 16) as u16 +} + +// Equivalent of win32 LOWORD macro +fn loword(v: u32) -> u16 { + v as u16 +} + +// Equivalent of win32 MAKELONG macro +fn makelong(low: u16, high: u16) -> u32 { + (high as u32) << 16 | low as u32 +} + +fn top_level_window<W: window::WindowClass + window::WindowData>( + module: HINSTANCE, + class: W, + title: &WideString, + style: &ElementStyle, +) -> Window<W> { + class + .builder(module) + .name(title) + .style(win::WS_OVERLAPPEDWINDOW) + .pos(win::CW_USEDEFAULT, win::CW_USEDEFAULT) + .size( + style + .horizontal_size_request + .and_then(|i| i.try_into().ok()) + .unwrap_or(win::CW_USEDEFAULT), + style + .vertical_size_request + .and_then(|i| i.try_into().ok()) + .unwrap_or(win::CW_USEDEFAULT), + ) + .create() +} + +window::basic_window_classes! { + /// Static control (text, image, etc) class. + struct Static => "STATIC"; + + /// Button control class. + struct Button => "BUTTON"; + + /// Edit control class. + struct Edit => "EDIT"; + + /// Progress control class. + struct Progress => "msctls_progress32"; +} + +/// A top-level application window. +/// +/// This is used for the main window and modal windows. +struct AppWindow { + renderer: WindowRenderer, + _quit_token: Option<QuitToken>, +} + +impl AppWindow { + pub fn new(renderer: WindowRenderer, quit_token: Option<QuitToken>) -> Self { + AppWindow { + renderer, + _quit_token: quit_token, + } + } +} + +impl window::WindowClass for AppWindow { + fn class_name() -> WideString { + WideString::new("App Window") + } +} + +impl CustomWindowClass for AppWindow { + fn icon() -> win::HICON { + static ICON: Lazy<win::HICON> = Lazy::new(|| unsafe { + // If CreateIconFromResource fails it returns NULL, which is fine (a default icon will be + // used). + win::CreateIconFromResource( + // We take advantage of the fact that since Windows Vista, an RT_ICON resource entry + // can simply be a PNG image. + super::icon::PNG_DATA.as_ptr(), + super::icon::PNG_DATA.len() as u32, + true.into(), + // The 0x00030000 constant isn't available anywhere; the docs basically say to just + // pass it... + 0x00030000, + ) + }); + + *ICON + } + + fn message( + data: &RefCell<Self>, + hwnd: HWND, + umsg: u32, + wparam: WPARAM, + lparam: LPARAM, + ) -> Option<LRESULT> { + let me = data.borrow(); + let model = me.renderer.model(); + match umsg { + win::WM_CREATE => { + if let Some(close) = &model.close { + close.subscribe(move |&()| unsafe { + win::SendMessageW(hwnd, win::WM_CLOSE, 0, 0); + }); + } + + let mut renderer = me.renderer.child_renderer(hwnd); + if let Some(child) = &model.content { + renderer.render_child(child); + } + + drop(model); + let children = std::mem::take(&mut me.renderer.model_mut().children); + for child in children { + renderer.render_window(child); + } + } + win::WM_CLOSE => { + if model.modal { + // Modal windows should hide themselves rather than closing/destroying. + unsafe { win::ShowWindow(hwnd, win::SW_HIDE) }; + return Some(0); + } + } + win::WM_SHOWWINDOW => { + if model.modal { + // Modal windows should disable/enable their parent as they are shown/hid, + // respectively. + let shown = wparam != 0; + unsafe { + KeyboardAndMouse::EnableWindow( + win::GetWindow(hwnd, win::GW_OWNER), + (!shown).into(), + ) + }; + return Some(0); + } + } + win::WM_GETMINMAXINFO => { + let minmaxinfo = unsafe { (lparam as *mut win::MINMAXINFO).as_mut().unwrap() }; + minmaxinfo.ptMinTrackSize.x = me.renderer.min_size.0.try_into().unwrap(); + minmaxinfo.ptMinTrackSize.y = me.renderer.min_size.1.try_into().unwrap(); + return Some(0); + } + win::WM_SIZE => { + // When resized, recompute the layout. + let width = loword(lparam as _) as u32; + let height = hiword(lparam as _) as u32; + + if let Some(child) = &model.content { + me.renderer.layout(child, width, height); + unsafe { Gdi::UpdateWindow(hwnd) }; + } + return Some(0); + } + win::WM_GETFONT => return Some(**me.renderer.font() as _), + win::WM_COMMAND => { + let child = lparam as HWND; + let windows = me.renderer.windows.borrow(); + if let Some(&element) = windows.reverse().get(&child) { + // # Safety + // The ElementRefs all pertain to the model stored in the renderer. + let element = unsafe { element.get() }; + // Handle button presses. + use model::ElementType::*; + match &element.element_type { + Button(model::Button { click, .. }) => { + let code = hiword(wparam as _) as u32; + if code == win::BN_CLICKED { + click.fire(&()); + return Some(0); + } + } + Checkbox(model::Checkbox { checked, .. }) => { + let code = hiword(wparam as _) as u32; + if code == win::BN_CLICKED { + let check_state = + unsafe { win::SendMessageW(child, win::BM_GETCHECK, 0, 0) }; + if let Property::Binding(s) = checked { + *s.borrow_mut() = check_state == Controls::BST_CHECKED as isize; + } + return Some(0); + } + } + _ => (), + } + } + } + _ => (), + } + None + } +} + +/// State used while creating and updating windows. +struct WindowRenderer { + // We wrap with an Rc to get weak references in property callbacks (like that of + // `ElementStyle::visible`). + inner: Rc<WindowRendererInner>, +} + +impl std::ops::Deref for WindowRenderer { + type Target = WindowRendererInner; + + fn deref(&self) -> &Self::Target { + &self.inner + } +} + +struct WindowRendererInner { + pub module: HINSTANCE, + /// The model is pinned and boxed to ensure that references in `windows` remain valid. + /// + /// We need to keep the model around so we can correctly perform layout as the window size + /// changes. Unfortunately the win32 API doesn't have any nice ways to automatically perform + /// layout. + pub model: RefCell<Pin<Box<model::Window>>>, + pub min_size: (u32, u32), + /// Mapping between model elements and windows. + /// + /// Element references pertain to elements in `model`. + pub windows: RefCell<twoway::TwoWay<ElementRef, HWND>>, + pub font: Font, + pub bold_font: Font, +} + +impl WindowRenderer { + pub fn new(module: HINSTANCE, model: model::Window, style: &model::ElementStyle) -> Self { + WindowRenderer { + inner: Rc::new(WindowRendererInner { + module, + model: RefCell::new(Box::pin(model)), + min_size: ( + style.horizontal_size_request.unwrap_or(0), + style.vertical_size_request.unwrap_or(0), + ), + windows: Default::default(), + font: Font::caption(), + bold_font: Font::caption_bold().unwrap_or_else(Font::caption), + }), + } + } + + pub fn child_renderer(&self, window: HWND) -> WindowChildRenderer { + WindowChildRenderer { + renderer: &self.inner, + window, + child_id: 0, + scroll: false, + } + } + + pub fn layout(&self, element: &Element, max_width: u32, max_height: u32) { + layout::Layout::new(self.inner.windows.borrow().forward()) + .layout(element, max_width, max_height); + } + + pub fn model(&self) -> std::cell::Ref<'_, model::Window> { + std::cell::Ref::map(self.inner.model.borrow(), |b| &**b) + } + + pub fn model_mut(&self) -> std::cell::RefMut<'_, model::Window> { + std::cell::RefMut::map(self.inner.model.borrow_mut(), |b| &mut **b) + } + + pub fn font(&self) -> &Font { + &self.inner.font + } +} + +struct WindowChildRenderer<'a> { + renderer: &'a Rc<WindowRendererInner>, + window: HWND, + child_id: i32, + scroll: bool, +} + +impl<'a> WindowChildRenderer<'a> { + fn add_child<W: window::WindowClass>(&mut self, class: W) -> WindowBuilder<W> { + let builder = class + .builder(self.renderer.module) + .style(win::WS_CHILD | win::WS_VISIBLE) + .parent(self.window) + .child_id(self.child_id); + self.child_id += 1; + builder + } + + fn add_window<W: window::WindowClass>(&mut self, class: W) -> WindowBuilder<W> { + class + .builder(self.renderer.module) + .style(win::WS_OVERLAPPEDWINDOW) + .pos(win::CW_USEDEFAULT, win::CW_USEDEFAULT) + .parent(self.window) + } + + fn render_window(&mut self, model: TypedElement<model::Window>) -> Window { + let name = WideString::new(model.element_type.title.as_str()); + let style = model.style; + let w = self + .add_window(AppWindow::new( + WindowRenderer::new(self.renderer.module, model.element_type, &style), + None, + )) + .size( + style + .horizontal_size_request + .and_then(|i| i.try_into().ok()) + .unwrap_or(win::CW_USEDEFAULT), + style + .vertical_size_request + .and_then(|i| i.try_into().ok()) + .unwrap_or(win::CW_USEDEFAULT), + ) + .name(&name) + .create(); + + enabled_property(&style.enabled, w.handle); + + let hwnd = w.handle; + let set_visible = move |visible| unsafe { + win::ShowWindow(hwnd, if visible { win::SW_SHOW } else { win::SW_HIDE }); + }; + + match &style.visible { + Property::Static(false) => set_visible(false), + Property::Binding(s) => { + s.on_change(move |v| set_visible(*v)); + if !*s.borrow() { + set_visible(false); + } + } + _ => (), + } + + w.generic() + } + + fn render_child(&mut self, element: &Element) { + if let Some(mut window) = self.render_element_type(&element.element_type) { + window.set_default_font(&self.renderer.font); + + // Store the element to handle mapping. + self.renderer + .windows + .borrow_mut() + .insert(ElementRef::new(element), window.handle); + + enabled_property(&element.style.enabled, window.handle); + } + + // Handle visibility properties. + match &element.style.visible { + Property::Static(false) => { + set_visibility(element, false, self.renderer.windows.borrow().forward()) + } + Property::Binding(s) => { + let weak_renderer = Rc::downgrade(self.renderer); + let element_ref = ElementRef::new(element); + let parent = self.window; + s.on_change(move |visible| { + let Some(renderer) = weak_renderer.upgrade() else { + return; + }; + // # Safety + // ElementRefs are valid as long as the renderer is (and we have a strong + // reference to it). + let element = unsafe { element_ref.get() }; + set_visibility(element, *visible, renderer.windows.borrow().forward()); + // Send WM_SIZE so that the parent recomputes the layout. + unsafe { + let mut rect = std::mem::zeroed::<RECT>(); + win::GetClientRect(parent, &mut rect); + win::SendMessageW( + parent, + win::WM_SIZE, + 0, + makelong( + (rect.right - rect.left) as u16, + (rect.bottom - rect.top) as u16, + ) as isize, + ); + } + }); + if !*s.borrow() { + set_visibility(element, false, self.renderer.windows.borrow().forward()); + } + } + _ => (), + } + } + + fn render_element_type(&mut self, element_type: &model::ElementType) -> Option<Window> { + use model::ElementType as ET; + match element_type { + ET::Label(model::Label { text, bold }) => { + let mut window = match text { + Property::Static(text) => { + let text = WideString::new(text.as_str()); + self.add_child(Static) + .name(&text) + .add_style(SystemServices::SS_LEFT | SystemServices::SS_NOPREFIX) + .create() + } + Property::Binding(b) => { + let text = WideString::new(b.borrow().as_str()); + let window = self + .add_child(Static) + .name(&text) + .add_style(SystemServices::SS_LEFT | SystemServices::SS_NOPREFIX) + .create(); + let handle = window.handle; + b.on_change(move |text| { + let text = WideString::new(text.as_str()); + unsafe { win::SetWindowTextW(handle, text.pcwstr()) }; + }); + window + } + Property::ReadOnly(_) => { + unimplemented!("ReadOnly property not supported for Label::text") + } + }; + if *bold { + window.set_font(&self.renderer.bold_font); + } + Some(window.generic()) + } + ET::TextBox(model::TextBox { + placeholder, + content, + editable, + }) => { + let scroll = self.scroll; + let window = self + .add_child(Edit) + .add_style( + (win::ES_LEFT + | win::ES_MULTILINE + | win::ES_WANTRETURN + | if *editable { 0 } else { win::ES_READONLY }) + as u32 + | win::WS_BORDER + | win::WS_TABSTOP + | if scroll { win::WS_VSCROLL } else { 0 }, + ) + .create(); + + fn to_control_text(s: &str) -> String { + s.replace("\n", "\r\n") + } + + fn from_control_text(s: &str) -> String { + s.replace("\r\n", "\n") + } + + struct SubClassData { + placeholder: Option<WideString>, + } + + // EM_SETCUEBANNER doesn't work with multiline edit controls (for no particular + // reason?), so we have to draw it ourselves. + unsafe extern "system" fn subclass_proc( + hwnd: HWND, + msg: u32, + wparam: WPARAM, + lparam: LPARAM, + _uidsubclass: usize, + dw_ref_data: usize, + ) -> LRESULT { + let ret = Shell::DefSubclassProc(hwnd, msg, wparam, lparam); + if msg == win::WM_PAINT + && KeyboardAndMouse::GetFocus() != hwnd + && win::GetWindowTextLengthW(hwnd) == 0 + { + let data = (dw_ref_data as *const SubClassData).as_ref().unwrap(); + if let Some(placeholder) = &data.placeholder { + let mut rect = std::mem::zeroed::<RECT>(); + win::GetClientRect(hwnd, &mut rect); + Gdi::InflateRect(&mut rect, -2, -2); + + let dc = gdi::DC::new(hwnd).expect("failed to create GDI DC"); + dc.with_object_selected( + win::SendMessageW(hwnd, win::WM_GETFONT, 0, 0) as _, + |hdc| { + Gdi::SetTextColor( + hdc, + Controls::GetThemeSysColor(0, Gdi::COLOR_GRAYTEXT), + ); + Gdi::SetBkMode(hdc, Gdi::TRANSPARENT as i32); + success!(nonzero Gdi::DrawTextW( + hdc, + placeholder.pcwstr(), + -1, + &mut rect, + Gdi::DT_LEFT | Gdi::DT_TOP | Gdi::DT_WORDBREAK, + )); + }, + ) + .expect("failed to select font gdi object"); + } + } + + // Multiline edit controls capture the tab key. We want it to work as usual in + // the dialog (focusing the next input control). + if msg == win::WM_GETDLGCODE && wparam == KeyboardAndMouse::VK_TAB as usize { + return 0; + } + + if msg == win::WM_DESTROY { + drop(unsafe { Box::from_raw(dw_ref_data as *mut SubClassData) }); + } + return ret; + } + + let subclassdata = Box::into_raw(Box::new(SubClassData { + placeholder: placeholder + .as_ref() + .map(|s| WideString::new(to_control_text(s))), + })); + + unsafe { + Shell::SetWindowSubclass( + window.handle, + Some(subclass_proc), + 0, + subclassdata as _, + ); + } + + // Set up content property. + match content { + Property::ReadOnly(od) => { + let handle = window.handle; + od.register(move |target| { + // GetWindowText requires the buffer be large enough for the terminating + // null character (otherwise it truncates the string), but + // GetWindowTextLength returns the length without the null character, so we + // add 1. + let length = unsafe { win::GetWindowTextLengthW(handle) } + 1; + let mut buf = vec![0u16; length as usize]; + unsafe { win::GetWindowTextW(handle, buf.as_mut_ptr(), length) }; + buf.pop(); // null character; `String` doesn't want that + *target = from_control_text(&String::from_utf16_lossy(&buf)); + }); + } + Property::Static(s) => { + let text = WideString::new(to_control_text(s)); + unsafe { win::SetWindowTextW(window.handle, text.pcwstr()) }; + } + Property::Binding(b) => { + let handle = window.handle; + b.on_change(move |text| { + let text = WideString::new(to_control_text(text.as_str())); + unsafe { win::SetWindowTextW(handle, text.pcwstr()) }; + }); + let text = WideString::new(to_control_text(b.borrow().as_str())); + unsafe { win::SetWindowTextW(window.handle, text.pcwstr()) }; + } + } + Some(window.generic()) + } + ET::Scroll(model::Scroll { content }) => { + if let Some(content) = content { + // Scrolling is implemented in a cooperative, non-universal way right now. + self.scroll = true; + self.render_child(content); + self.scroll = false; + } + None + } + ET::Button(model::Button { content, .. }) => { + if let Some(ET::Label(model::Label { + text: Property::Static(text), + .. + })) = content.as_ref().map(|e| &e.element_type) + { + let text = WideString::new(text); + + let window = self + .add_child(Button) + .add_style(win::BS_PUSHBUTTON as u32 | win::WS_TABSTOP) + .name(&text) + .create(); + Some(window.generic()) + } else { + None + } + } + ET::Checkbox(model::Checkbox { checked, label }) => { + let label = label.as_ref().map(WideString::new); + let mut builder = self + .add_child(Button) + .add_style((win::BS_AUTOCHECKBOX | win::BS_MULTILINE) as u32 | win::WS_TABSTOP); + if let Some(label) = &label { + builder = builder.name(label); + } + let window = builder.create(); + + fn set_check(handle: HWND, value: bool) { + unsafe { + win::SendMessageW( + handle, + win::BM_SETCHECK, + if value { + Controls::BST_CHECKED + } else { + Controls::BST_UNCHECKED + } as usize, + 0, + ); + } + } + + match checked { + Property::Static(checked) => set_check(window.handle, *checked), + Property::Binding(s) => { + let handle = window.handle; + s.on_change(move |v| { + set_check(handle, *v); + }); + set_check(window.handle, *s.borrow()); + } + _ => unimplemented!("ReadOnly properties not supported for Checkbox"), + } + + Some(window.generic()) + } + ET::Progress(model::Progress { amount }) => { + let window = self + .add_child(Progress) + .add_style(Controls::PBS_MARQUEE) + .create(); + + fn set_amount(handle: HWND, value: Option<f32>) { + match value { + None => unsafe { + win::SendMessageW(handle, Controls::PBM_SETMARQUEE, 1, 0); + }, + Some(v) => unsafe { + win::SendMessageW(handle, Controls::PBM_SETMARQUEE, 0, 0); + win::SendMessageW( + handle, + Controls::PBM_SETPOS, + (v.clamp(0f32, 1f32) * 100f32) as usize, + 0, + ); + }, + } + } + + match amount { + Property::Static(v) => set_amount(window.handle, *v), + Property::Binding(s) => { + let handle = window.handle; + s.on_change(move |v| set_amount(handle, *v)); + set_amount(window.handle, *s.borrow()); + } + _ => unimplemented!("ReadOnly properties not supported for Progress"), + } + + Some(window.generic()) + } + // VBox/HBox are virtual, their behaviors are implemented entirely in the renderer layout. + // No need for additional windows. + ET::VBox(model::VBox { items, .. }) => { + for item in items { + self.render_child(item); + } + None + } + ET::HBox(model::HBox { items, .. }) => { + for item in items { + self.render_child(item); + } + None + } + } + } +} + +/// Handle the enabled property. +/// +/// This function assumes the default state of the window is enabled. +fn enabled_property(enabled: &Property<bool>, window: HWND) { + match enabled { + Property::Static(false) => unsafe { + KeyboardAndMouse::EnableWindow(window, false.into()); + }, + Property::Binding(s) => { + let handle = window; + s.on_change(move |enabled| { + unsafe { KeyboardAndMouse::EnableWindow(handle, (*enabled).into()) }; + }); + if !*s.borrow() { + unsafe { KeyboardAndMouse::EnableWindow(window, false.into()) }; + } + } + _ => (), + } +} + +/// Set the visibility of the given element. This recurses down the element tree and hides children +/// as necessary. +fn set_visibility(element: &Element, visible: bool, windows: &HashMap<ElementRef, HWND>) { + if let Some(&hwnd) = windows.get(&ElementRef::new(element)) { + unsafe { + win::ShowWindow(hwnd, if visible { win::SW_SHOW } else { win::SW_HIDE }); + } + } else { + match &element.element_type { + model::ElementType::VBox(model::VBox { items, .. }) => { + for item in items { + set_visibility(item, visible, windows); + } + } + model::ElementType::HBox(model::HBox { items, .. }) => { + for item in items { + set_visibility(item, visible, windows); + } + } + model::ElementType::Scroll(model::Scroll { + content: Some(content), + }) => { + set_visibility(&*content, visible, windows); + } + _ => (), + } + } +} |