A.Olokhtonov
2 months ago
12 changed files with 177 additions and 127 deletions
@ -0,0 +1,35 @@
@@ -0,0 +1,35 @@
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const config = { |
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ws_url: `wss://${window.location.host}/ws/`, |
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ping_url: `https://${window.location.host}/api/ping`, |
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image_url: `https://${window.location.host}/images/`, |
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sync_timeout: 1000, |
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ws_reconnect_timeout: 2000, |
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brush_preview_timeout: 1000, |
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second_finger_timeout: 500, |
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buffer_first_touchmoves: 5, |
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debug_print: false, |
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zoom_delta: 0.05, |
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min_zoom_level: -250, |
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max_zoom_level: 100, |
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initial_offline_timeout: 1000, |
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default_color: 0x00, |
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default_width: 8, |
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bytes_per_instance: 4 * 2 + 4, // axy, stroke_id
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bytes_per_stroke: 2 * 3 + 2, // r, g, b, width
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initial_static_bytes: 4096 * 16, |
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initial_dynamic_bytes: 4096, |
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initial_wasm_bytes: 4096, |
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stroke_texture_size: 1024, // means no more than 1024^2 = 1M strokes in total (this is a LOT. HMH blackboard has like 80K)
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dynamic_stroke_texture_size: 128, // means no more than 128^2 = 16K dynamic strokes at once
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ui_texture_size: 16, |
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bvh_fullnode_depth: 5, |
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pattern_fadeout_min: 0.3, |
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pattern_fadeout_max: 0.75, |
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min_pressure: 50, |
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benchmark: { |
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zoom_level: -75, |
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offset: { x: 425, y: -1195 }, |
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frames: 500, |
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}, |
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}; |
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@ -0,0 +1,103 @@
@@ -0,0 +1,103 @@
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function undo(state, context, event, options) { |
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let need_draw = false; |
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// Remove effect of latest own event, in a way that is recoverable
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// Iterate back to front to find the _latest_ event
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for (let i = state.events.length - 1; i >=0; --i) { |
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const other_event = state.events[i]; |
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let skipped = false; |
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// Users can only undo their own, undeleted (not already undone) events
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if (other_event.user_id === event.user_id && !other_event.deleted) { |
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// All "persistent" events (those that are pushed using SYN messages) should be handled here
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// "Transient" events are by design droppable, and should not be undone, nor saved in state.events at all
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switch (other_event.type) { |
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case EVENT.STROKE: { |
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other_event.deleted = true; |
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if (other_event.bvh_node && !options.skip_bvh) { |
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bvh_delete_stroke(state, other_event); |
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} |
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need_draw = true; |
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break; |
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} |
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case EVENT.UNDO: { |
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// do not undo an undo, we are not Notepad
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skipped = true; |
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break; |
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} |
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case EVENT.IMAGE: { |
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other_event.deleted = true; |
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const image = get_image(context, other_event.image_id); |
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if (image !== null) { |
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image.deleted = true; |
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} |
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need_draw = true; |
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break; |
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} |
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case EVENT.IMAGE_MOVE: { |
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other_event.deleted = true; |
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const image = get_image(context, other_event.image_id); |
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if (image !== null) { |
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image.move_head -= 2; |
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image.at.x = image.move_history[image.move_head - 2]; |
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image.at.y = image.move_history[image.move_head - 1]; |
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need_draw = true; |
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} else { |
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console.warning('Undo image move for a non-existent image'); |
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} |
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break; |
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} |
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case EVENT.IMAGE_SCALE: { |
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other_event.deleted = true; |
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const image = get_image(context, other_event.image_id); |
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if (image !== null) { |
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image.scale_head -= 4; |
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// NEXT: merge move and scale. Otherwise we can't know
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// that there have been move events inbetween scale
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image.at.x = image.scale_history[image.scale_head - 4]; |
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image.at.y = image.scale_history[image.scale_head - 3]; |
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image.width = image.scale_history[image.scale_head - 2]; |
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image.height = image.scale_history[image.scale_head - 1]; |
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need_draw = true; |
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} else { |
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console.warning('Undo image scale for a non-existent image'); |
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} |
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break; |
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} |
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case EVENT.ERASER: { |
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other_event.deleted = true; |
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const stroke = state.events[other_event.stroke_id]; |
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stroke.deleted = false; |
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if (!options.skip_bvh) { |
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bvh_undelete_stroke(state, stroke); |
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} |
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need_draw = true; |
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break; |
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} |
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default: { |
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console.error('cant undo event type', other_event.type); |
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break; |
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} |
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} |
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if (!skipped) { |
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break; |
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} |
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} |
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} |
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return need_draw; |
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} |
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function redo() { |
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console.log('TODO'); |
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} |
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