1 files changed, 142 insertions, 0 deletions
diff --git a/src/view/MapView.ts b/src/view/MapView.ts
new file mode 100644
index 0000000..b366d28
--- /dev/null
+++ b/src/view/MapView.ts
@@ -0,0 +1,142 @@
+'use strict';
+
+
+import * as util from '../util';
+import EntityPosition from '../model/EntityPosition';
+import MapData from '../model/MapData';
+
+
+const tileSize = 32;
+
+const body = document.getElementsByTagName('body')[0];
+
+
+function loadImage(url: string): Promise<HTMLImageElement> {
+        return new Promise(function(resolve, reject) {
+                var img = new Image();
+                img.addEventListener('load', () => { resolve(img); });
+                img.addEventListener('error', () => { reject(Error('Failed to load ' + url)); });
+                img.src = url;
+        });
+}
+
+function loadImages(imgs: {[key: string]: string}): Promise<{[key: string]: HTMLImageElement}> {
+        return util.mapPromises(_.mapValues(imgs, loadImage));
+}
+
+function loadTiles(tiles: {[key: string]: {file: string}}): Promise<{[key: string]: HTMLImageElement}> {
+        return loadImages(_.mapValues(tiles, (t) => `resources/sprite/tile/${t.file}.png`));
+}
+
+function loadEntities(entities: EntityPosition[]): Promise<{[key: string]: HTMLImageElement}> {
+        var p: {[key: string]: Promise<HTMLImageElement>} = {};
+
+        entities.forEach(e => {
+                p[e.entity.name] = loadImage(`resources/sprite/entity/${e.entity.name}.png`);
+        });
+
+        return util.mapPromises(p);
+}
+
+
+export default class MapView {
+        redrawPending: boolean = false;
+
+        canvas: HTMLCanvasElement;
+        ctx: CanvasRenderingContext2D;
+
+        tiles: {[key: string]: HTMLImageElement};
+        entitySprites: {[key: string]: HTMLImageElement};
+
+        constructor(private map: MapData, private entities: {[key: string]: EntityPosition}) {
+                this.canvas = document.createElement('canvas');
+                this.canvas.style.position = 'absolute';
+                body.appendChild(this.canvas);
+
+                this.ctx = this.canvas.getContext('2d');
+
+                window.addEventListener('resize', () => this.setSize());
+                this.setSize();
+
+                var tilesReady = loadTiles(map.tiles).then((tiles) => {
+                        this.tiles = tiles;
+                });
+
+                var entitiesReady = loadEntities(this.getEntities()).then((entities) => {
+                        this.entitySprites = entities;
+                });
+
+                Promise.all([tilesReady, entitiesReady]).then(() => {
+                        this.redraw();
+                });
+        }
+
+        getEntities(): EntityPosition[] {
+                return _.valuesIn<EntityPosition>(this.entities);
+        }
+
+        setSize() {
+                var e = document.documentElement;
+                this.canvas.width = window.innerWidth || e.clientWidth || body.clientWidth;
+                this.canvas.height = window.innerHeight || e.clientHeight || body.clientHeight;
+
+                this.redraw()
+        }
+
+        drawTile(x: number, y: number, tile: HTMLImageElement) {
+                if (!tile)
+                        return;
+
+                this.ctx.drawImage(tile, x, y);
+        }
+
+        drawEntity(e: EntityPosition) {
+                var sprite = this.entitySprites[e.entity.name];
+                if (!sprite)
+                        return;
+
+                this.ctx.drawImage(
+                        sprite,
+                        e.direction*tileSize, 0,
+                        tileSize, tileSize,
+                        e.position.x*tileSize, e.position.y*tileSize,
+                        tileSize, tileSize
+                );
+        }
+
+        draw() {
+                this.redrawPending = false;
+
+                this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
+
+                if (!this.tiles || !this.entitySprites)
+                        return;
+
+                this.map.layers.forEach((layer) => {
+                        let y = 0;
+
+                        layer.forEach((row) => {
+                                let x = 0;
+
+                                for (let tile in row) {
+                                        this.drawTile(x, y, this.tiles[row[tile]]);
+                                        x += tileSize;
+                                }
+
+                                y += tileSize;
+                        });
+                });
+
+                this.getEntities().forEach(e => {
+                        this.drawEntity(e);
+                });
+        }
+
+        redraw() {
+                if (this.redrawPending)
+                        return;
+
+                this.redrawPending = true;
+                window.requestAnimationFrame(() => this.draw());
+        }
+}