[Feat] add has_background config to control visibility of background component (#110)

* [Feat] add has_background config for control visiblity of background
component

* [Feat] add default has_background config

generator/src/components/background.rs

@@ -2,7 +2,10 @@ use tiny_skia::{
     Color, GradientStop, LinearGradient, Paint, Pixmap, Point, Rect, SpreadMode, Transform,
 };
 
-use crate::color::{is_valid_hex_color, RgbaColor};
+use crate::{
+    color::{is_valid_hex_color, RgbaColor},
+    edges::padding::Padding,
+};
 
 use super::interface::{
     component::{Component, ComponentContext, RenderParams},
@@ -12,11 +15,15 @@ use super::interface::{
 
 pub struct Background {
     children: Vec<Box<dyn Component>>,
+    has_background: bool,
 }
 
 impl Background {
-    pub fn from_children(children: Vec<Box<dyn Component>>) -> Background {
-        Background { children }
+    pub fn new(has_background: bool, children: Vec<Box<dyn Component>>) -> Background {
+        Background {
+            children,
+            has_background,
+        }
     }
 }
 
@@ -26,7 +33,22 @@ impl Component for Background {
     }
 
     fn style(&self) -> RawComponentStyle {
-        RawComponentStyle::default().align(ComponentAlign::Column)
+        let style = RawComponentStyle::default().align(ComponentAlign::Column);
+
+        if self.has_background {
+            return style.padding(Padding {
+                top: 82.,
+                left: 122.,
+                right: 122.,
+                bottom: 82.,
+            });
+        }
+
+        return style;
+    }
+
+    fn self_render_condition(&self) -> bool {
+        self.has_background
     }
 
     fn draw_self(

generator/src/components/code_block.rs

@@ -1,9 +1,4 @@
-use crate::edges::margin::Margin;
-
-use super::interface::{
-    component::Component,
-    style::{RawComponentStyle, Style},
-};
+use super::interface::component::Component;
 
 pub struct CodeBlock {
     children: Vec<Box<dyn Component>>,
@@ -13,13 +8,6 @@ impl Component for CodeBlock {
     fn children(&self) -> &Vec<Box<dyn Component>> {
         &self.children
     }
-
-    fn style(&self) -> RawComponentStyle {
-        Style::default().margin(Margin {
-            top: 10.,
-            ..Margin::default()
-        })
-    }
 }
 
 impl CodeBlock {

generator/src/components/container.rs

@@ -1,11 +1,9 @@
 use tiny_skia::Pixmap;
 
-use crate::edges::padding::Padding;
-
 use super::interface::{
     component::{Component, ComponentContext, ComponentRenderParams},
     render_error::Result,
-    style::{RawComponentStyle, Style},
+    style::Style,
 };
 
 pub struct Container {
@@ -16,15 +14,6 @@ impl Component for Container {
     fn children(&self) -> &Vec<Box<dyn Component>> {
         &self.children
     }
-
-    fn style(&self) -> RawComponentStyle {
-        Style::default().padding(Padding {
-            top: 82.,
-            left: 122.,
-            right: 122.,
-            bottom: 82.,
-        })
-    }
 }
 
 impl Container {

generator/src/components/editor/mac_title_bar.rs

@@ -1,9 +1,12 @@
 use tiny_skia::{Color, FillRule, Paint, PathBuilder, Transform};
 
-use crate::components::interface::{
-    component::{Component, ComponentContext, RenderParams},
-    render_error,
-    style::{ComponentStyle, RawComponentStyle, Size, Style},
+use crate::{
+    components::interface::{
+        component::{Component, ComponentContext, RenderParams},
+        render_error,
+        style::{ComponentStyle, RawComponentStyle, Size, Style},
+    },
+    edges::margin::Margin,
 };
 
 pub struct MacTitleBar {
@@ -20,7 +23,12 @@ impl Component for MacTitleBar {
     fn style(&self) -> RawComponentStyle {
         let demeter = self.radius * 2.;
 
-        Style::default().size(Size::Num(demeter + 2. * 25.), Size::Num(demeter))
+        Style::default()
+            .size(Size::Num(demeter + 2. * 25.), Size::Num(demeter))
+            .margin(Margin {
+                bottom: 10.,
+                ..Margin::default()
+            })
     }
 
     fn render_condition(&self) -> bool {

generator/src/components/interface/component.rs

@@ -60,10 +60,16 @@ pub trait Component {
         render_params.clone()
     }
 
+    // The render_condition determines whether the component should be rendered or not
     fn render_condition(&self) -> bool {
         true
     }
 
+    // The difference with render_condition is that self_render_condition still renders childrens
+    fn self_render_condition(&self) -> bool {
+        true
+    }
+
     fn draw_self(
         &self,
         _pixmap: &mut Pixmap,
@@ -87,7 +93,19 @@ pub trait Component {
     }
 
     fn parsed_style(&self) -> Style<f32> {
-        let style = self.style();
+        // If render_condition return false, the whole component shouldn't rendered,
+        // includes its children
+        if !self.render_condition() {
+            return ComponentStyle::default();
+        }
+
+        // If self_render_condition return false, the component shouldn't rendered,
+        // so the corresponding style should be cleared
+        let style = if self.self_render_condition() {
+            self.style()
+        } else {
+            RawComponentStyle::default()
+        };
         let (width, height) = self.get_dynamic_wh();
         let width = self.parse_size(style.width, width)
             + style.padding.horizontal()
@@ -121,12 +139,19 @@ pub trait Component {
         let render_params = self.initialize(
             &component_render_params.parse_into_render_params_with_style(
                 parent_style.clone(),
-                sibling_style,
+                sibling_style.clone(),
                 style.clone(),
             ),
         );
 
-        self.draw_self(pixmap, context, &render_params, &style, &parent_style)?;
+        // Render nothing on paint if render_condition return false
+        if !self.render_condition() {
+            return Ok(render_params.clone());
+        }
+
+        if self.self_render_condition() {
+            self.draw_self(pixmap, context, &render_params, &style, &parent_style)?;
+        }
 
         let children = self.children();
         let mut sibling_render_params = RenderParams {
@@ -136,10 +161,6 @@ pub trait Component {
         let mut sibling_style = ComponentStyle::default();
 
         for child in children {
-            if !child.render_condition() {
-                continue;
-            }
-
             sibling_render_params = child.draw(
                 pixmap,
                 context,

generator/src/components/interface/style.rs

@@ -1,6 +1,6 @@
 use crate::edges::{margin::Margin, padding::Padding};
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub enum ComponentAlign {
     Row,
     Column,
@@ -11,7 +11,7 @@ pub enum Size {
     Num(f32),
 }
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct Style<T> {
     pub width: T,
     pub height: T,

generator/src/components/watermark.rs

@@ -25,28 +25,26 @@ impl Component for Watermark {
     ) -> render_error::Result<()> {
         let params = &context.take_snapshot_params;
 
-        if &params.watermark != "" {
-            let attrs = Attrs::new().family(Family::Name(
-                &context.take_snapshot_params.watermark_font_family,
-            ));
+        let attrs = Attrs::new().family(Family::Name(
+            &context.take_snapshot_params.watermark_font_family,
+        ));
 
-            FontRenderer::new(
-                20.,
-                20.,
-                context.scale_factor,
-                &context.take_snapshot_params.fonts_folder,
-            )
-            .draw_line(
-                0.,
-                render_params.y,
-                pixmap.width() as f32,
-                pixmap.height() as f32,
-                &params.watermark,
-                attrs,
-                Some(Align::Center),
-                pixmap,
-            );
-        }
+        FontRenderer::new(
+            20.,
+            20.,
+            context.scale_factor,
+            &context.take_snapshot_params.fonts_folder,
+        )
+        .draw_line(
+            0.,
+            render_params.y,
+            pixmap.width() as f32,
+            pixmap.height() as f32,
+            &params.watermark,
+            attrs,
+            Some(Align::Center),
+            pixmap,
+        );
 
         Ok(())
     }
@@ -55,6 +53,10 @@ impl Component for Watermark {
         &self.children
     }
 
+    fn render_condition(&self) -> bool {
+        self.value != ""
+    }
+
     fn style(&self) -> RawComponentStyle {
         let default_style = RawComponentStyle::default();
 

generator/src/config.rs

@@ -30,6 +30,7 @@ pub struct TakeSnapshotParams {
     pub highlight_start_line_number: Option<usize>,
     pub highlight_end_line_number: Option<usize>,
     pub min_width: Option<f32>,
+    pub has_background: bool,
 }
 
 impl FromObject for TakeSnapshotParams {

generator/src/copy.rs

@@ -5,6 +5,8 @@ use arboard::{Clipboard, ImageData};
 
 use nvim_oxi::Result;
 
+// The function will be called as FFI on Lua side
+#[allow(dead_code)]
 pub fn copy_into_clipboard(config: TakeSnapshotParams) -> Result<()> {
     let pixmap = take_snapshot(config.clone())?;
     let premultplied_colors = pixmap.pixels();

generator/src/edges/margin.rs

@@ -1,6 +1,6 @@
 use super::edge::Edge;
 
-#[derive(Clone, Default)]
+#[derive(Clone, Default, Debug)]
 pub struct Margin {
     pub left: f32,
     pub right: f32,

generator/src/edges/padding.rs

@@ -1,6 +1,6 @@
 use super::edge::Edge;
 
-#[derive(Clone, Default)]
+#[derive(Clone, Default, Debug)]
 pub struct Padding {
     pub left: f32,
     pub right: f32,

generator/src/save.rs

@@ -1,6 +1,8 @@
 use crate::{config::TakeSnapshotParams, path::parse_save_path, snapshot::take_snapshot};
 use nvim_oxi::{lua::Error::RuntimeError, Error, Result};
 
+// The function will be called as FFI on Lua side
+#[allow(dead_code)]
 pub fn save_snapshot(config: TakeSnapshotParams) -> Result<()> {
     match &config.save_path {
         Some(path) => {

generator/src/snapshot.rs

@@ -26,35 +26,45 @@ pub fn take_snapshot(params: TakeSnapshotParams) -> render_error::Result<Pixmap>
         scale_factor: SCALE_FACTOR,
         take_snapshot_params: Arc::new(params.clone()),
     };
-    let pixmap = Container::from_children(vec![Box::new(Background::from_children(vec![
-        Box::new(Rect::new(
-            16.,
-            params.min_width,
-            vec![
-                Box::new(MacTitleBar::from_radius(8., params.mac_window_bar)),
-                Box::new(Breadcrumbs::from_path(
-                    params.file_path,
-                    15.,
-                    params.breadcrumbs_separator,
-                    params.has_breadcrumbs,
-                )),
-                Box::new(CodeBlock::from_children(vec![
-                    Box::new(HighlightCodeBlock::from_line_number(
-                        params.highlight_start_line_number,
-                        params.highlight_end_line_number,
-                        LINE_HEIGHT,
+    // If background is disabled, should hidden watermark component
+    // If watermark text is equal to "", the watermark component is hidden
+    let watermark = if params.has_background {
+        params.watermark
+    } else {
+        "".to_string()
+    };
+    let pixmap = Container::from_children(vec![Box::new(Background::new(
+        params.has_background,
+        vec![
+            Box::new(Rect::new(
+                16.,
+                params.min_width,
+                vec![
+                    Box::new(MacTitleBar::from_radius(8., params.mac_window_bar)),
+                    Box::new(Breadcrumbs::from_path(
+                        params.file_path,
+                        15.,
+                        params.breadcrumbs_separator,
+                        params.has_breadcrumbs,
                     )),
-                    Box::new(LineNumber::new(
-                        &params.code,
-                        params.start_line_number,
-                        LINE_HEIGHT,
-                    )),
-                    Box::new(Code::new(params.code, LINE_HEIGHT, 15.)),
-                ])),
-            ],
-        )),
-        Box::new(Watermark::new(params.watermark)),
-    ]))])
+                    Box::new(CodeBlock::from_children(vec![
+                        Box::new(HighlightCodeBlock::from_line_number(
+                            params.highlight_start_line_number,
+                            params.highlight_end_line_number,
+                            LINE_HEIGHT,
+                        )),
+                        Box::new(LineNumber::new(
+                            &params.code,
+                            params.start_line_number,
+                            LINE_HEIGHT,
+                        )),
+                        Box::new(Code::new(params.code, LINE_HEIGHT, 15.)),
+                    ])),
+                ],
+            )),
+            Box::new(Watermark::new(watermark)),
+        ],
+    ))])
     .draw_root(&context)?;
 
     Ok(pixmap)

lua/codesnap/config.lua

@@ -49,6 +49,7 @@ function config_module.get_config(extension)
     theme = "base16-onedark",
     file_path = static.config.has_breadcrumbs and get_file_path(static.config.show_workspace) or "",
     start_line_number = static.config.has_line_number and start_line_number or nil,
+    has_background = true,
   }, static.config)
 
   config.save_path = parse_save_path(config.save_path)