Flip if-else:s with a negation (#8063)

crates/eframe/src/web/events.rs

@@ -1114,16 +1114,16 @@ fn get_display_size(resize_observer_entries: &js_sys::Array) -> Result<(u32, u32
     } else if JsValue::from_str("contentBoxSize").js_in(entry.as_ref()) {
         let content_box_size = entry.content_box_size();
         let idx0 = content_box_size.at(0);
-        if !idx0.is_undefined() {
+        if idx0.is_undefined() {
-            let size: web_sys::ResizeObserverSize = idx0.dyn_into()?;
-            width = size.inline_size();
-            height = size.block_size();
-        } else {
             // legacy
             let size = JsValue::clone(content_box_size.as_ref());
             let size: web_sys::ResizeObserverSize = size.dyn_into()?;
             width = size.inline_size();
             height = size.block_size();
+        } else {
+            let size: web_sys::ResizeObserverSize = idx0.dyn_into()?;
+            width = size.inline_size();
+            height = size.block_size();
         }
         if DEBUG_RESIZE {
             log::info!("contentBoxSize {width}x{height}");

crates/egui/src/response.rs

@@ -272,10 +272,10 @@ impl Response {
                 false
             } else if let Some(pos) = pointer_interact_pos {
                 let layer_under_pointer = self.ctx.layer_id_at(pos);
-                if layer_under_pointer != Some(self.layer_id) {
+                if layer_under_pointer == Some(self.layer_id) {
-                    true
-                } else {
                     !self.interact_rect.contains(pos)
+                } else {
+                    true
                 }
             } else {
                 false // clicked without a pointer, weird

crates/egui/src/text_selection/text_cursor_state.rs

@@ -156,13 +156,13 @@ fn select_line_at(text: &str, ccursor: CCursor) -> CCursorRange {
                     let min = ccursor_previous_line(text, ccursor);
                     let max = ccursor_next_line(text, min);
                     CCursorRange::two(min, max)
-                } else if !is_linebreak(char_after_cursor) {
+                } else if is_linebreak(char_after_cursor) {
-                    let max = ccursor_next_line(text, ccursor);
-                    CCursorRange::two(ccursor, max)
-                } else {
                     let min = ccursor_previous_line(text, ccursor);
                     let max = ccursor_next_line(text, ccursor);
                     CCursorRange::two(min, max)
+                } else {
+                    let max = ccursor_next_line(text, ccursor);
+                    CCursorRange::two(ccursor, max)
                 }
             } else {
                 let min = ccursor_previous_line(text, ccursor);

crates/egui/src/widgets/slider.rs

@@ -314,7 +314,7 @@ impl<'a> Slider<'a> {
     /// Default: `0.0` (disabled).
     #[inline]
     pub fn step_by(mut self, step: f64) -> Self {
-        self.step = if step != 0.0 { Some(step) } else { None };
+        self.step = if step == 0.0 { None } else { Some(step) };
         self
     }
 

crates/egui/src/widgets/text_edit/builder.rs

@@ -680,7 +680,9 @@ impl TextEdit<'_> {
                 .wrap_mode(wrap_mode)
                 .allocate(ui);
 
-            allocated.frame = if !custom_frame {
+            allocated.frame = if custom_frame {
+                allocated.frame
+            } else {
                 let visuals = ui.style().interact(&allocated.response);
                 let background_color =
                     background_color.unwrap_or_else(|| ui.visuals().text_edit_bg_color());
@@ -713,8 +715,6 @@ impl TextEdit<'_> {
                     )
                     .outer_margin(Margin::same(-(visuals.expansion as i8)))
                     .stroke(stroke)
-            } else {
-                allocated.frame
             };
 
             allocated.paint(ui)
@@ -1019,7 +1019,9 @@ fn events(
                 }
             }
             Event::Paste(text_to_insert) => {
-                if !text_to_insert.is_empty() {
+                if text_to_insert.is_empty() {
+                    None
+                } else {
                     let mut ccursor = text.delete_selected(&cursor_range);
                     if multiline {
                         text.insert_text_at(&mut ccursor, text_to_insert, char_limit);
@@ -1029,8 +1031,6 @@ fn events(
                     }
 
                     Some(CCursorRange::one(ccursor))
-                } else {
-                    None
                 }
             }
             Event::Text(text_to_insert) => {

crates/egui_demo_app/src/wrap_app.rs

@@ -466,10 +466,10 @@ impl WrapApp {
                 for file in &i.raw.hovered_files {
                     if let Some(path) = &file.path {
                         write!(text, "\n{}", path.display()).ok();
-                    } else if !file.mime.is_empty() {
+                    } else if file.mime.is_empty() {
-                        write!(text, "\n{}", file.mime).ok();
-                    } else {
                         text += "\n???";
+                    } else {
+                        write!(text, "\n{}", file.mime).ok();
                     }
                 }
                 text
@@ -505,10 +505,10 @@ impl WrapApp {
                     for file in &self.dropped_files {
                         let mut info = if let Some(path) = &file.path {
                             path.display().to_string()
-                        } else if !file.name.is_empty() {
+                        } else if file.name.is_empty() {
-                            file.name.clone()
-                        } else {
                             "???".to_owned()
+                        } else {
+                            file.name.clone()
                         };
 
                         let mut additional_info = vec![];

crates/epaint/src/stats.rs

@@ -135,10 +135,10 @@ impl AllocInfo {
                 what,
                 self.megabytes()
             )
-        } else if self.element_size != ElementSize::Heterogenous {
+        } else if self.element_size == ElementSize::Heterogenous {
             format!(
                 "{:6} {:16}  {}     {:3} allocations",
-                self.num_elements(),
+                "",
                 what,
                 self.megabytes(),
                 self.num_allocs()
@@ -146,7 +146,7 @@ impl AllocInfo {
         } else {
             format!(
                 "{:6} {:16}  {}     {:3} allocations",
-                "",
+                self.num_elements(),
                 what,
                 self.megabytes(),
                 self.num_allocs()

examples/file_dialog/src/main.rs

@@ -50,10 +50,10 @@ impl eframe::App for MyApp {
                     for file in &self.dropped_files {
                         let mut info = if let Some(path) = &file.path {
                             path.display().to_string()
-                        } else if !file.name.is_empty() {
+                        } else if file.name.is_empty() {
-                            file.name.clone()
-                        } else {
                             "???".to_owned()
+                        } else {
+                            file.name.clone()
                         };
 
                         let mut additional_info = vec![];
@@ -95,10 +95,10 @@ fn preview_files_being_dropped(ctx: &egui::Context) {
             for file in &i.raw.hovered_files {
                 if let Some(path) = &file.path {
                     write!(text, "\n{}", path.display()).ok();
-                } else if !file.mime.is_empty() {
+                } else if file.mime.is_empty() {
-                    write!(text, "\n{}", file.mime).ok();
-                } else {
                     text += "\n???";
+                } else {
+                    write!(text, "\n{}", file.mime).ok();
                 }
             }
             text

tests/test_viewports/src/main.rs

@@ -416,16 +416,7 @@ fn drag_source<R>(
 ) -> InnerResponse<R> {
     let is_being_dragged = ui.ctx().is_being_dragged(id);
 
-    if !is_being_dragged {
+    if is_being_dragged {
-        let res = ui.scope(body);
-
-        // Check for drags:
-        let response = ui.interact(res.response.rect, id, egui::Sense::drag());
-        if response.hovered() {
-            ui.set_cursor_icon(egui::CursorIcon::Grab);
-        }
-        res
-    } else {
         ui.set_cursor_icon(egui::CursorIcon::Grabbing);
 
         // Paint the body to a new layer:
@@ -440,6 +431,15 @@ fn drag_source<R>(
             );
         }
 
+        res
+    } else {
+        let res = ui.scope(body);
+
+        // Check for drags:
+        let response = ui.interact(res.response.rect, id, egui::Sense::drag());
+        if response.hovered() {
+            ui.set_cursor_icon(egui::CursorIcon::Grab);
+        }
         res
     }
 }