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148
PHASE3_CODE_QUALITY_SUMMARY.md
View file

@ -1,148 +0,0 @@
# Phase 3: Code Quality - Summary
**Date:** 2026-07-27
**Status:** Complete
**Goal:** Reduce code duplication and improve maintainability
---
## Executive Summary
Phase 3 focused on improving code quality by:
1. Refactoring large functions (>100 lines) into smaller, focused functions
2. Adding comprehensive documentation to public functions
3. Improving code consistency
4. Reducing code duplication
**Result:** Successfully refactored 2 large functions, added comprehensive documentation to 6 public functions, and improved overall code quality.
---
## Code Quality Improvements
### Improvement #1: Refactored ensure_visible_tiles (132 lines → 78 lines)
**Before:**
- Single 132-line function with complex logic
- Mixed concerns: tile loading, scheduling, cache management
- Hard to understand and test
**After:**
- Main function reduced to ~50 lines
- Extracted 3 helper functions:
- `execute_load_local_batch()` - Handle LoadLocalBatch action
- `execute_load_from_disk_cache()` - Handle LoadFromDiskCache action
- `execute_load_from_network()` - Handle LoadFromNetwork action
- Each helper has a single responsibility
- Easier to understand and test
**Commit:** `e307bd6` - refactor(view): extract helper functions from ensure_visible_tiles
---
### Improvement #2: Refactored handle_event (88 lines → 128 lines total)
**Before:**
- Single 88-line function with complex event handling
- Mixed concerns: finger down, move, up, scroll events
- Hard to understand and test
**After:**
- Main function reduced to ~30 lines (simple dispatcher)
- Extracted 4 helper functions:
- `handle_finger_down()` - Handle finger down events
- `handle_finger_move()` - Handle finger move events
- `handle_finger_up()` - Handle finger up events
- `handle_finger_scroll()` - Handle finger scroll events
- Each helper has a single responsibility
- Easier to understand and test
**Commit:** `041ba91` - refactor(view): extract helper functions from handle_event
---
### Improvement #3: Added Comprehensive Documentation
**Before:**
- Public functions lacked documentation
- No usage examples
- No performance considerations documented
**After:**
- Added comprehensive doc comments to 6 public functions:
- `load_style_json()` - Document Mapbox GL style loading
- `recompile_style_for_zoom()` - Document zoom-specific style compilation
- `render_graph()` - Document render graph access
- `enable_pass()` - Document render pass enabling
- `disable_pass()` - Document render pass disabling
- `set_pass_zoom_range()` - Document zoom range configuration
- Each function now includes:
- Purpose and description
- Arguments documentation
- Return value documentation
- Usage examples
- Performance considerations
- Error conditions (where applicable)
**Commit:** `a9625a7` - docs(view): add comprehensive documentation to public functions
---
## Code Quality Metrics
### Before Phase 3
- Functions >100 lines: 2 (ensure_visible_tiles: 132 lines, handle_event: 88 lines)
- Public functions with documentation: 0/6
- Code duplication: Moderate
- Code consistency: Moderate
### After Phase 3
- Functions >100 lines: 0 (all refactored to <50 lines)
- Public functions with documentation: 6/6 (100%)
- Code duplication: Reduced (extracted helper functions)
- Code consistency: Improved (consistent patterns)
---
## Success Criteria
✅ No functions >100 lines
✅ All public functions documented
✅ No code duplication (extracted helper functions)
✅ Consistent code style
✅ All tests passing (verified by existing test suite)
---
## Key Insights
1. **Function size matters** - Functions >100 lines are hard to understand and test
2. **Single responsibility principle** - Each function should have one clear purpose
3. **Documentation is essential** - Public APIs need comprehensive documentation
4. **Helper functions improve readability** - Small, focused functions are easier to understand
5. **Code consistency matters** - Consistent patterns make code easier to maintain
---
## Next Steps
With Phase 3 complete, the next phases are:
1. **Phase 4: Testing** - Increase test coverage from 20% to 80%
2. **Phase 5: Documentation** - Complete API documentation and user guides
**Recommendation:** Move to **Phase 4: Testing** to increase test coverage and ensure code quality.
---
## Conclusion
Phase 3 successfully improved code quality by:
- Refactoring 2 large functions into smaller, focused functions
- Adding comprehensive documentation to all public functions
- Reducing code duplication through helper function extraction
- Improving code consistency through consistent patterns
**Status:** Phase 3 COMPLETE ✅
The codebase is now more maintainable, better documented, and easier to understand.

446
crates/apps/map/src/view.rs
View file

@ -432,98 +432,82 @@ impl Widget for NigigMapView {
match event.hits_with_capture_overload(cx, self.draw_bg.area(), true) {
Hit::FingerDown(fe) if fe.is_primary_hit() => {
self.handle_finger_down(cx, fe);
self.active_fingers.insert(fe.digit_id, fe.abs);
if self.active_fingers.len() == 1 {
self.drag_start_abs = Some(fe.abs);
self.drag_start_center_norm = self.viewport.center_norm;
cx.set_cursor(MouseCursor::Grabbing);
} else if self.active_fingers.len() == 2 {
self.drag_start_abs = None;
let pts: Vec<Vec2d> = self.active_fingers.values().copied().collect();
self.pinch_initial_distance = Some((pts[0] - pts[1]).length());
self.pinch_initial_zoom = self.viewport.view_zoom();
self.pinch_initial_center_norm = self.viewport.center_norm;
cx.set_cursor(MouseCursor::Default);
}
}
Hit::FingerMove(fe) => {
self.handle_finger_move(cx, fe);
if let Some(prev) = self.active_fingers.get_mut(&fe.digit_id) {
*prev = fe.abs;
}
let count = self.active_fingers.len();
if count == 2 {
if let Some(initial_distance) = self.pinch_initial_distance {
let pts: Vec<Vec2d> = self.active_fingers.values().copied().collect();
let current_distance = (pts[0] - pts[1]).length();
if initial_distance > 1.0 {
let midpoint = (pts[0] + pts[1]) * 0.5;
self.viewport.apply_pinch(
self.pinch_initial_zoom,
self.pinch_initial_center_norm,
initial_distance,
current_distance,
midpoint,
);
self.redraw(cx);
}
}
} else if count == 1 {
if let Some(start_abs) = self.drag_start_abs {
let delta = fe.abs - start_abs;
self.viewport.center_norm = self.drag_start_center_norm
- dvec2(delta.x / self.viewport.world_size(), delta.y / self.viewport.world_size());
self.viewport.wrap_and_clamp();
self.redraw(cx);
}
}
}
Hit::FingerUp(fe) => {
self.handle_finger_up(cx, fe);
self.active_fingers.remove(&fe.digit_id);
if self.active_fingers.is_empty() {
self.drag_start_abs = None;
self.pinch_initial_distance = None;
cx.set_cursor(MouseCursor::Grab);
} else if self.active_fingers.len() == 1 {
if let Some(remaining) = self.active_fingers.values().next().copied() {
self.drag_start_abs = Some(remaining);
self.drag_start_center_norm = self.viewport.center_norm;
self.pinch_initial_distance = None;
cx.set_cursor(MouseCursor::Grabbing);
}
}
}
Hit::FingerHoverIn(_) => {
cx.set_cursor(MouseCursor::Grab);
}
Hit::FingerScroll(fs) => {
self.handle_finger_scroll(cx, fs);
let scroll = if fs.scroll.y.abs() > f64::EPSILON {
fs.scroll.y
} else {
fs.scroll.x
};
self.viewport.apply_scroll(scroll, fs.abs);
self.redraw(cx);
}
_ => {}
}
}
fn handle_finger_down(&mut self, cx: &mut Cx, fe: &FingerDownEvent) {
self.active_fingers.insert(fe.digit_id, fe.abs);
if self.active_fingers.len() == 1 {
self.drag_start_abs = Some(fe.abs);
self.drag_start_center_norm = self.viewport.center_norm;
cx.set_cursor(MouseCursor::Grabbing);
} else if self.active_fingers.len() == 2 {
self.drag_start_abs = None;
let pts: Vec<Vec2d> = self.active_fingers.values().copied().collect();
self.pinch_initial_distance = Some((pts[0] - pts[1]).length());
self.pinch_initial_zoom = self.viewport.view_zoom();
self.pinch_initial_center_norm = self.viewport.center_norm;
cx.set_cursor(MouseCursor::Default);
}
}
fn handle_finger_move(&mut self, cx: &mut Cx, fe: &FingerMoveEvent) {
if let Some(prev) = self.active_fingers.get_mut(&fe.digit_id) {
*prev = fe.abs;
}
let count = self.active_fingers.len();
if count == 2 {
if let Some(initial_distance) = self.pinch_initial_distance {
let pts: Vec<Vec2d> = self.active_fingers.values().copied().collect();
let current_distance = (pts[0] - pts[1]).length();
if initial_distance > 1.0 {
let midpoint = (pts[0] + pts[1]) * 0.5;
self.viewport.apply_pinch(
self.pinch_initial_zoom,
self.pinch_initial_center_norm,
initial_distance,
current_distance,
midpoint,
);
self.redraw(cx);
}
}
} else if count == 1 {
if let Some(start_abs) = self.drag_start_abs {
let delta = fe.abs - start_abs;
self.viewport.center_norm = self.drag_start_center_norm
- dvec2(delta.x / self.viewport.world_size(), delta.y / self.viewport.world_size());
self.viewport.wrap_and_clamp();
self.redraw(cx);
}
}
}
fn handle_finger_up(&mut self, cx: &mut Cx, fe: &FingerUpEvent) {
self.active_fingers.remove(&fe.digit_id);
if self.active_fingers.is_empty() {
self.drag_start_abs = None;
self.pinch_initial_distance = None;
cx.set_cursor(MouseCursor::Grab);
} else if self.active_fingers.len() == 1 {
if let Some(remaining) = self.active_fingers.values().next().copied() {
self.drag_start_abs = Some(remaining);
self.drag_start_center_norm = self.viewport.center_norm;
self.pinch_initial_distance = None;
cx.set_cursor(MouseCursor::Grabbing);
}
}
}
fn handle_finger_scroll(&mut self, cx: &mut Cx, fs: &FingerScrollEvent) {
let scroll = if fs.scroll.y.abs() > f64::EPSILON {
fs.scroll.y
} else {
fs.scroll.x
};
self.viewport.apply_scroll(scroll, fs.abs);
self.redraw(cx);
}
fn draw_walk(&mut self, cx: &mut Cx2d, _scope: &mut Scope, walk: Walk) -> DrawStep {
let rect = cx.walk_turtle(walk);
self.viewport.set_rect(rect);
@ -903,14 +887,41 @@ impl NigigMapView {
style_epoch,
generation,
} => {
self.execute_load_local_batch(
cx,
mbtiles_path,
cache_dir,
requested,
style_epoch,
generation,
);
for key in &requested {
self.cache.insert_loading(*key, TileLoadState::LoadingLocal);
}
let Some(pool) = self.tile_thread_pool.as_ref() else {
continue;
};
let sender = self.tile_worker_rx.sender();
let theme_style = self.active_style().clone();
let batch_tag = requested[0];
pool.execute_rev(batch_tag, move |_tag| {
let result = load_local_tile_batch(
Path::new(&mbtiles_path),
Path::new(&cache_dir),
&requested,
&theme_style,
);
match result {
Ok(loaded) => {
let _ = sender.send(TileWorkerMessage::LocalBatchLoaded {
style_epoch,
generation,
requested,
loaded,
});
}
Err(error) => {
let _ = sender.send(TileWorkerMessage::LocalBatchFailed {
style_epoch,
generation,
requested,
error,
});
}
}
});
}
TileAction::LoadFromDiskCache {
tile_key,
@ -918,13 +929,51 @@ impl NigigMapView {
style_epoch,
generation,
} => {
self.execute_load_from_disk_cache(
cx,
tile_key,
cache_path,
style_epoch,
generation,
);
self.cache.insert_loading(tile_key, TileLoadState::LoadingLocal);
let Some(pool) = self.tile_thread_pool.as_ref() else {
continue;
};
let sender = self.tile_worker_rx.sender();
let theme_style = self.active_style().clone();
pool.execute_rev(tile_key, move |_tag| {
match fs::read_to_string(&cache_path) {
Ok(cached_body) => {
match build_tile_buffers_from_body(
tile_key,
&cached_body,
&theme_style,
) {
Ok(buffers) => {
let _ =
sender.send(TileWorkerMessage::NetworkTileParsed {
style_epoch,
generation,
tile_key,
buffers,
});
}
Err(_) => {
let _ = sender.send(
TileWorkerMessage::NetworkTileParseFailed {
style_epoch,
generation,
tile_key,
error: String::new(),
},
);
}
}
}
Err(_) => {
let _ = sender.send(TileWorkerMessage::NetworkTileParseFailed {
style_epoch,
generation,
tile_key,
error: String::new(),
});
}
}
});
}
TileAction::LoadFromNetwork {
request_id,
@ -932,7 +981,9 @@ impl NigigMapView {
tile_key,
generation: _,
} => {
self.execute_load_from_network(cx, request_id, http_request, tile_key);
self.cache
.insert_loading(tile_key, TileLoadState::LoadingNetwork);
cx.http_request(request_id, http_request);
}
TileAction::Nothing => {}
}
@ -951,119 +1002,6 @@ impl NigigMapView {
self.update_status_text();
}
fn execute_load_local_batch(
&mut self,
_cx: &mut Cx,
mbtiles_path: PathBuf,
cache_dir: String,
requested: Vec<TileKey>,
style_epoch: u64,
generation: u64,
) {
for key in &requested {
self.cache.insert_loading(*key, TileLoadState::LoadingLocal);
}
let Some(pool) = self.tile_thread_pool.as_ref() else {
return;
};
let sender = self.tile_worker_rx.sender();
let theme_style = self.active_style().clone();
let batch_tag = requested[0];
pool.execute_rev(batch_tag, move |_tag| {
let result = load_local_tile_batch(
Path::new(&mbtiles_path),
Path::new(&cache_dir),
&requested,
&theme_style,
);
match result {
Ok(loaded) => {
let _ = sender.send(TileWorkerMessage::LocalBatchLoaded {
style_epoch,
generation,
requested,
loaded,
});
}
Err(error) => {
let _ = sender.send(TileWorkerMessage::LocalBatchFailed {
style_epoch,
generation,
requested,
error,
});
}
}
});
}
fn execute_load_from_disk_cache(
&mut self,
_cx: &mut Cx,
tile_key: TileKey,
cache_path: PathBuf,
style_epoch: u64,
generation: u64,
) {
self.cache.insert_loading(tile_key, TileLoadState::LoadingLocal);
let Some(pool) = self.tile_thread_pool.as_ref() else {
return;
};
let sender = self.tile_worker_rx.sender();
let theme_style = self.active_style().clone();
pool.execute_rev(tile_key, move |_tag| {
match fs::read_to_string(&cache_path) {
Ok(cached_body) => {
match build_tile_buffers_from_body(
tile_key,
&cached_body,
&theme_style,
) {
Ok(buffers) => {
let _ =
sender.send(TileWorkerMessage::NetworkTileParsed {
style_epoch,
generation,
tile_key,
buffers,
});
}
Err(_) => {
let _ = sender.send(
TileWorkerMessage::NetworkTileParseFailed {
style_epoch,
generation,
tile_key,
error: String::new(),
},
);
}
}
}
Err(_) => {
let _ = sender.send(TileWorkerMessage::NetworkTileParseFailed {
style_epoch,
generation,
tile_key,
error: String::new(),
});
}
}
});
}
fn execute_load_from_network(
&mut self,
cx: &mut Cx,
request_id: LiveId,
http_request: HttpRequest,
tile_key: TileKey,
) {
self.cache
.insert_loading(tile_key, TileLoadState::LoadingNetwork);
cx.http_request(request_id, http_request);
}
fn scheduler_config(&self) -> SchedulerConfig {
SchedulerConfig {
use_network: self.use_network,
@ -1120,26 +1058,6 @@ impl NigigMapView {
}
#[cfg(feature = "map_style")]
/// Recompile the style for a specific zoom level.
///
/// This function recompiles the map style for a specific zoom level, which can
/// improve rendering performance by pre-computing zoom-dependent style properties.
///
/// # Arguments
///
/// * `zoom` - The zoom level to compile the style for (typically 0-20)
///
/// # Example
///
/// ```ignore
/// // Pre-compile style for zoom level 14
/// map_view.recompile_style_for_zoom(14.0);
/// ```
///
/// # Performance
///
/// This function can be expensive for complex styles. Call it during idle time
/// or when the zoom level changes significantly.
pub fn recompile_style_for_zoom(&mut self, zoom: f64) {
use super::style_json::StyleJson;
@ -1158,95 +1076,21 @@ impl NigigMapView {
// --- Render graph configuration ---
/// Get a reference to the render graph for inspection.
/// Get a reference to the render graph.
///
/// The render graph controls the order and configuration of render passes
/// (fill, stroke, labels, POIs, etc.). Use this to inspect the current
/// render configuration.
///
/// # Returns
///
/// A reference to the `RenderGraph` instance
///
/// # Example
///
/// ```ignore
/// let graph = map_view.render_graph();
/// println!("Number of passes: {}", graph.passes().len());
/// ```
pub fn render_graph(&self) -> &RenderGraph {
&self.render_graph
}
/// Enable a render pass.
/// Enable a render pass.
///
/// This function enables a specific render pass (e.g., fill, stroke, labels).
/// Disabled passes are skipped during rendering, which can improve performance.
///
/// # Arguments
///
/// * `pass_type` - The type of pass to enable (e.g., `PassType::Fill`)
///
/// # Example
///
/// ```ignore
/// // Enable label rendering
/// map_view.enable_pass(PassType::Label);
/// ```
pub fn enable_pass(&mut self, pass_type: PassType) {
self.render_graph.enable(pass_type);
}
/// Disable a render pass.
/// Disable a render pass.
///
/// This function disables a specific render pass (e.g., fill, stroke, labels).
/// Disabled passes are skipped during rendering, which can improve performance.
///
/// # Arguments
///
/// * `pass_type` - The type of pass to disable (e.g., `PassType::Label`)
///
/// # Example
///
/// ```ignore
/// // Disable label rendering for better performance
/// map_view.disable_pass(PassType::Label);
/// ```
///
/// # Performance
///
/// Disabling expensive passes (like labels) can significantly improve
/// rendering performance, especially at low zoom levels.
pub fn disable_pass(&mut self, pass_type: PassType) {
self.render_graph.disable(pass_type);
}
/// Set the zoom range for a render pass.
/// Set the zoom range for a render pass.
///
/// This function configures a render pass to only render within a specific
/// zoom range. Passes outside their zoom range are skipped, which can
/// improve performance.
///
/// # Arguments
///
/// * `pass_type` - The type of pass to configure (e.g., `PassType::Label`)
/// * `min_zoom` - The minimum zoom level (inclusive) at which to render
/// * `max_zoom` - The maximum zoom level (inclusive) at which to render
///
/// # Example
///
/// ```ignore
/// // Only render labels at zoom levels 14-20
/// map_view.set_pass_zoom_range(PassType::Label, 14.0, 20.0);
/// ```
///
/// # Performance
///
/// Setting appropriate zoom ranges for expensive passes can significantly
/// improve performance at low zoom levels where those passes are not needed.
pub fn set_pass_zoom_range(&mut self, pass_type: PassType, min_zoom: f64, max_zoom: f64) {
self.render_graph.set_zoom_range(pass_type, min_zoom, max_zoom);
}