feat: fill in error messages if preview fails (#2917)

yazi-adapter/src/image.rs

@@ -1,4 +1,4 @@
-use std::path::{Path, PathBuf};
+use std::path::Path;
 
 use anyhow::Result;
 use image::{DynamicImage, ExtendedColorType, ImageDecoder, ImageEncoder, ImageError, ImageReader, ImageResult, Limits, codecs::{jpeg::JpegEncoder, png::PngEncoder}, imageops::FilterType, metadata::Orientation};
@@ -10,7 +10,7 @@ use crate::Dimension;
 pub struct Image;
 
 impl Image {
-	pub async fn precache(path: &Path, cache: PathBuf) -> Result<()> {
+	pub async fn precache(path: &Path, cache: &Path) -> Result<()> {
 		let (mut img, orientation, icc) = Self::decode_from(path).await?;
 		let (w, h) = Self::flip_size(orientation, (YAZI.preview.max_width, YAZI.preview.max_height));
 

yazi-plugin/preset/plugins/font.lua

@@ -10,13 +10,13 @@ function M:peek(job)
 
 	local ok, err = self:preload(job)
 	if not ok or err then
-		return
+		return ya.preview_widget(job, err)
 	end
 
 	ya.sleep(math.max(0, rt.preview.image_delay / 1000 + start - os.clock()))
 
 	local _, err = ya.image_show(cache, job.area)
-	ya.preview_widget(job, err and ui.Text(err):area(job.area):wrap(ui.Wrap.YES))
+	ya.preview_widget(job, err)
 end
 
 function M:seek() end
@@ -45,10 +45,12 @@ function M:preload(job)
 		"JPG:" .. tostring(cache),
 	}):status()
 
-	if status then
-		return status.success
-	else
+	if not status then
 		return true, Err("Failed to start `magick`, error: %s", err)
+	elseif not status.success then
+		return false, Err("`magick` exited with error code: %s", status.code)
+	else
+		return true
 	end
 end
 

yazi-plugin/preset/plugins/magick.lua

@@ -8,13 +8,13 @@ function M:peek(job)
 
 	local ok, err = self:preload(job)
 	if not ok or err then
-		return
+		return ya.preview_widget(job, err)
 	end
 
 	ya.sleep(math.max(0, rt.preview.image_delay / 1000 + start - os.clock()))
 
 	local _, err = ya.image_show(cache, job.area)
-	ya.preview_widget(job, err and ui.Text(err):area(job.area):wrap(ui.Wrap.YES))
+	ya.preview_widget(job, err)
 end
 
 function M:seek() end
@@ -38,10 +38,12 @@ function M:preload(job)
 		string.format("JPG:%s", cache),
 	}:status()
 
-	if status then
-		return status.success
-	else
+	if not status then
 		return true, Err("Failed to start `magick`, error: %s", err)
+	elseif not status.success then
+		return false, Err("`magick` exited with error code: %s", status.code)
+	else
+		return true
 	end
 end
 

yazi-plugin/preset/plugins/pdf.lua

@@ -8,13 +8,13 @@ function M:peek(job)
 
 	local ok, err = self:preload(job)
 	if not ok or err then
-		return
+		return ya.preview_widget(job, err)
 	end
 
 	ya.sleep(math.max(0, rt.preview.image_delay / 1000 + start - os.clock()))
 
 	local _, err = ya.image_show(cache, job.area)
-	ya.preview_widget(job, err and ui.Text(err):area(job.area):wrap(ui.Wrap.YES))
+	ya.preview_widget(job, err)
 end
 
 function M:seek(job)

yazi-plugin/preset/plugins/svg.lua

@@ -8,13 +8,13 @@ function M:peek(job)
 
 	local ok, err = self:preload(job)
 	if not ok or err then
-		return
+		return ya.preview_widget(job, err)
 	end
 
 	ya.sleep(math.max(0, rt.preview.image_delay / 1000 + start - os.clock()))
 
 	local _, err = ya.image_show(cache, job.area)
-	ya.preview_widget(job, err and ui.Text(err):area(job.area):wrap(ui.Wrap.YES))
+	ya.preview_widget(job, err)
 end
 
 function M:seek() end
@@ -60,10 +60,12 @@ function M:preload(job)
 		end
 	end
 
-	if status then
-		return status.success
-	else
+	if not status then
 		return true, Err("Error while running `resvg`: %s", err)
+	elseif not status.success then
+		return false, Err("`resvg` exited with error code: %s", status.code)
+	else
+		return true
 	end
 end
 

yazi-plugin/preset/plugins/video.lua

@@ -8,13 +8,13 @@ function M:peek(job)
 
 	local ok, err = self:preload(job)
 	if not ok or err then
-		return
+		return ya.preview_widget(job, err)
 	end
 
 	ya.sleep(math.max(0, rt.preview.image_delay / 1000 + start - os.clock()))
 
 	local _, err = ya.image_show(cache, job.area)
-	ya.preview_widget(job, err and ui.Text(err):area(job.area):wrap(ui.Wrap.YES))
+	ya.preview_widget(job, err)
 end
 
 function M:seek(job)
@@ -76,10 +76,12 @@ function M:preload(job)
 		"-y", tostring(cache),
 	}):status()
 
-	if status then
-		return status.success
-	else
+	if not status then
 		return true, Err("Failed to start `ffmpeg`, error: %s", err)
+	elseif not status.success then
+		return false, Err("`ffmpeg` exited with error code: %s", status.code)
+	else
+		return true
 	end
 end
 

yazi-plugin/src/elements/area.rs

@@ -50,6 +50,10 @@ impl Area {
 	}
 }
 
+impl From<Rect> for Area {
+	fn from(rect: Rect) -> Self { Self::Rect(rect) }
+}
+
 impl TryFrom<AnyUserData> for Area {
 	type Error = mlua::Error;
 

yazi-plugin/src/elements/renderable.rs

@@ -1,8 +1,10 @@
 use std::any::TypeId;
 
 use mlua::{AnyUserData, ExternalError};
+use yazi_binding::Error;
 
 use super::{Bar, Border, Clear, Gauge, Line, List, Table, Text};
+use crate::elements::Rect;
 
 #[derive(Clone, Debug)]
 pub enum Renderable {
@@ -35,10 +37,10 @@ impl Renderable {
 	}
 }
 
-impl TryFrom<AnyUserData> for Renderable {
+impl TryFrom<&AnyUserData> for Renderable {
 	type Error = mlua::Error;
 
-	fn try_from(ud: AnyUserData) -> Result<Self, Self::Error> {
+	fn try_from(ud: &AnyUserData) -> Result<Self, Self::Error> {
 		Ok(match ud.type_id() {
 			Some(t) if t == TypeId::of::<Line>() => Self::Line(ud.take()?),
 			Some(t) if t == TypeId::of::<Text>() => Self::Text(ud.take()?),
@@ -52,3 +54,20 @@ impl TryFrom<AnyUserData> for Renderable {
 		})
 	}
 }
+
+impl TryFrom<AnyUserData> for Renderable {
+	type Error = mlua::Error;
+
+	fn try_from(ud: AnyUserData) -> Result<Self, Self::Error> { Self::try_from(&ud) }
+}
+
+impl From<(Rect, Error)> for Renderable {
+	fn from((area, error): (Rect, Error)) -> Self {
+		Self::Text(Text {
+			area: area.into(),
+			inner: error.into_string().into(),
+			wrap: ratatui::widgets::Wrap { trim: false }.into(),
+			..Default::default()
+		})
+	}
+}

yazi-plugin/src/elements/wrap.rs

@@ -18,6 +18,10 @@ impl Wrap {
 	}
 }
 
+impl From<ratatui::widgets::Wrap> for Wrap {
+	fn from(value: ratatui::widgets::Wrap) -> Self { Self(Some(value)) }
+}
+
 impl From<PreviewWrap> for Wrap {
 	fn from(value: PreviewWrap) -> Self {
 		Self(match value {

yazi-plugin/src/utils/image.rs

@@ -25,8 +25,11 @@ impl Utils {
 	}
 
 	pub(super) fn image_precache(lua: &Lua) -> mlua::Result<Function> {
-		lua.create_async_function(|_, (src, dist): (UrlRef, UrlRef)| async move {
-			Ok(Image::precache(&src, dist.to_path_buf()).await.is_ok())
+		lua.create_async_function(|lua, (src, dist): (UrlRef, UrlRef)| async move {
+			match Image::precache(&src, &dist).await {
+				Ok(()) => true.into_lua_multi(&lua),
+				Err(e) => (false, Error::Custom(e.to_string().into())).into_lua_multi(&lua),
+			}
 		})
 	}
 }

yazi-plugin/src/utils/preview.rs

@@ -1,4 +1,5 @@
 use mlua::{AnyUserData, ExternalError, Function, IntoLuaMulti, Lua, Table, Value};
+use yazi_binding::Error;
 use yazi_config::YAZI;
 use yazi_macro::emit;
 use yazi_shared::{errors::PeekError, event::Cmd};
@@ -69,7 +70,16 @@ impl Utils {
 					.sequence_values::<AnyUserData>()
 					.map(|ud| ud.and_then(Renderable::try_from))
 					.collect::<mlua::Result<_>>()?,
-				Value::UserData(ud) => vec![Renderable::try_from(ud)?],
+				Value::UserData(ud) => match Renderable::try_from(&ud) {
+					Ok(r) => vec![r],
+					Err(e) => {
+						if let Ok(err) = ud.take::<Error>() {
+							vec![(lock.area, err).into()]
+						} else {
+							Err(e)?
+						}
+					}
+				},
 				_ => Err("preview widget must be a renderable element or a table of them".into_lua_err())?,
 			};