Jan Pochyla
2 years ago
committed by
matejcik
parent
a7a305d34d
commit
a3c79bf4f7
@ -0,0 +1,32 @@
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use crate::ui::{
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display::{self, Color},
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geometry::Rect,
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};
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pub struct Pad {
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area: Rect,
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color: Color,
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clear: bool,
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}
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impl Pad {
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pub fn with_background(area: Rect, color: Color) -> Self {
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Self {
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area,
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color,
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clear: false,
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}
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}
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pub fn clear(&mut self) {
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self.clear = true;
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}
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pub fn paint(&mut self) {
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if self.clear {
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self.clear = false;
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display::rect(self.area, self.color);
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}
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}
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}
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@ -0,0 +1,132 @@
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use crate::ui::{
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component::{
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text::layout::{LayoutFit, TextNoOp},
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Component, ComponentExt, Event, EventCtx, FormattedText, Pad,
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},
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display,
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geometry::Rect,
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};
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use super::{
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page::{Page, PageMsg},
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theme,
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};
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pub struct Paginated<T> {
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page: Page<T>,
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pad: Pad,
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fade_after_next_paint: Option<i32>,
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}
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impl<T> Paginated<T>
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where
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T: Paginate,
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{
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pub fn new(area: Rect, mut content: T) -> Self {
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let active_page = 0;
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let page_count = content.page_count();
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Self {
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page: Page::new(area, content, page_count, active_page),
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pad: Pad::with_background(area, theme::BG),
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fade_after_next_paint: None,
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}
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}
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}
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impl<T> Component for Paginated<T>
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where
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T: Paginate,
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T: Component,
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{
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type Msg = T::Msg;
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fn event(&mut self, ctx: &mut EventCtx, event: Event) -> Option<Self::Msg> {
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self.page.event(ctx, event).and_then(|msg| match msg {
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PageMsg::Content(c) => Some(c),
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PageMsg::ChangePage(page) => {
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self.fade_after_next_paint = Some(theme::BACKLIGHT_NORMAL);
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self.page.inner_mut().change_page(page);
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self.page.inner_mut().request_complete_repaint(ctx);
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self.pad.clear();
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None
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}
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})
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}
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fn paint(&mut self) {
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self.pad.paint();
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self.page.paint();
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if let Some(val) = self.fade_after_next_paint.take() {
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display::fade_backlight(val);
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}
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}
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}
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#[cfg(feature = "ui_debug")]
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impl<T> crate::trace::Trace for Paginated<T>
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where
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T: crate::trace::Trace,
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{
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fn trace(&self, t: &mut dyn crate::trace::Tracer) {
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self.page.trace(t);
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}
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}
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pub trait Paginate {
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fn page_count(&mut self) -> usize;
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fn change_page(&mut self, active_page: usize);
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}
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impl<F, T> Paginate for FormattedText<F, T>
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where
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F: AsRef<[u8]>,
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T: AsRef<[u8]>,
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{
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fn page_count(&mut self) -> usize {
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let mut page_count = 1; // There's always at least one page.
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let mut char_offset = 0;
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loop {
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let fit = self.layout_content(&mut TextNoOp);
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match fit {
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LayoutFit::Fitting { .. } => {
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break; // TODO: We should consider if there's more content
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// to render.
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}
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LayoutFit::OutOfBounds { processed_chars } => {
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page_count += 1;
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char_offset += processed_chars;
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self.set_char_offset(char_offset);
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}
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}
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}
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// Reset the char offset back to the beginning.
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self.set_char_offset(0);
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page_count
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}
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fn change_page(&mut self, to_page: usize) {
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let mut active_page = 0;
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let mut char_offset = 0;
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// Make sure we're starting from the beginning.
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self.set_char_offset(char_offset);
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while active_page < to_page {
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let fit = self.layout_content(&mut TextNoOp);
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match fit {
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LayoutFit::Fitting { .. } => {
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break; // TODO: We should consider if there's more content
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// to render.
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}
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LayoutFit::OutOfBounds { processed_chars } => {
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active_page += 1;
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char_offset += processed_chars;
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self.set_char_offset(char_offset);
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}
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}
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}
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}
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}
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