656 lines
18 KiB
JavaScript
656 lines
18 KiB
JavaScript
const selectTransformTool = () =>
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toolbar.registerTool(
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"res/icons/box-select.svg",
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"Select Image",
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(state, opt) => {
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// Draw new cursor immediately
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ovCtx.clearRect(0, 0, ovCanvas.width, ovCanvas.height);
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state.movecb(mouse.coords.world.pos);
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// Canvas left mouse handlers
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mouse.listen.world.onmousemove.on(state.movecb);
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mouse.listen.world.btn.left.onclick.on(state.clickcb);
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mouse.listen.world.btn.left.ondragstart.on(state.dragstartcb);
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mouse.listen.world.btn.left.ondragend.on(state.dragendcb);
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// Canvas right mouse handler
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mouse.listen.world.btn.right.onclick.on(state.cancelcb);
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// Keyboard click handlers
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keyboard.listen.onkeyclick.on(state.keyclickcb);
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keyboard.listen.onkeydown.on(state.keydowncb);
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// Registers keyboard shortcuts
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keyboard.onShortcut({ctrl: true, key: "KeyC"}, state.ctrlccb);
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keyboard.onShortcut({ctrl: true, key: "KeyV"}, state.ctrlvcb);
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keyboard.onShortcut({ctrl: true, key: "KeyX"}, state.ctrlxcb);
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state.selected = null;
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},
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(state, opt) => {
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// Clear all those listeners and shortcuts we set up
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mouse.listen.world.onmousemove.clear(state.movecb);
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mouse.listen.world.btn.left.onclick.clear(state.clickcb);
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mouse.listen.world.btn.left.ondragstart.clear(state.dragstartcb);
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mouse.listen.world.btn.left.ondragend.clear(state.dragendcb);
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mouse.listen.world.btn.right.onclick.clear(state.cancelcb);
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keyboard.listen.onkeyclick.clear(state.keyclickcb);
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keyboard.listen.onkeydown.clear(state.keydowncb);
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keyboard.deleteShortcut(state.ctrlccb, "KeyC");
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keyboard.deleteShortcut(state.ctrlvcb, "KeyV");
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keyboard.deleteShortcut(state.ctrlxcb, "KeyX");
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// Clear any selections
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state.reset();
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// Resets cursor
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ovCtx.clearRect(0, 0, ovCanvas.width, ovCanvas.height);
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// Clears overlay
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imageCollection.inputElement.style.cursor = "auto";
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},
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{
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init: (state) => {
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state.clipboard = {};
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state.snapToGrid = true;
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state.keepAspectRatio = true;
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state.useClipboard = !!(
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navigator.clipboard && navigator.clipboard.write
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); // Use it by default if supported
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state.original = null;
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state.dragging = null;
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state._selected = null;
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Object.defineProperty(state, "selected", {
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get: () => state._selected,
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set: (v) => {
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if (v) state.ctxmenu.enableButtons();
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else state.ctxmenu.disableButtons();
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return (state._selected = v);
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},
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});
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state.moving = null;
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// Some things to easy request for a redraw
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state.lastMouseTarget = null;
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state.lastMouseMove = null;
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state.redraw = () => {
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ovCtx.clearRect(0, 0, ovCanvas.width, ovCanvas.height);
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state.movecb(state.lastMouseMove);
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};
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// Clears selection and make things right
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state.reset = () => {
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if (state.selected)
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uil.ctx.drawImage(
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state.original.image,
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state.original.x,
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state.original.y
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);
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if (state.dragging) state.dragging = null;
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else state.selected = null;
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state.redraw();
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};
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// Selection bounding box object. Has some witchery to deal with handles.
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const selectionBB = (x1, y1, x2, y2) => {
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return {
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original: {
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x: Math.min(x1, x2),
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y: Math.min(y1, y2),
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w: Math.abs(x1 - x2),
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h: Math.abs(y1 - y2),
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},
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x: Math.min(x1, x2),
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y: Math.min(y1, y2),
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w: Math.abs(x1 - x2),
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h: Math.abs(y1 - y2),
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updateOriginal() {
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this.original.x = this.x;
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this.original.y = this.y;
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this.original.w = this.w;
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this.original.h = this.h;
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},
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contains(x, y) {
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return (
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this.x <= x &&
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x <= this.x + this.w &&
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this.y <= y &&
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y <= this.y + this.h
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);
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},
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handles() {
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const _createHandle = (x, y, originOffset = null, size = 10) => {
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return {
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x: x - size / 2,
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y: y - size / 2,
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w: size,
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h: size,
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contains(x, y) {
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return (
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this.x <= x &&
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x <= this.x + this.w &&
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this.y <= y &&
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y <= this.y + this.h
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);
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},
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scaleTo: (tx, ty, keepAspectRatio = true) => {
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const origin = {
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x: this.original.x + this.original.w / 2,
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y: this.original.y + this.original.h / 2,
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};
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let nx = tx;
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let ny = ty;
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let xRatio = (nx - origin.x) / (x - origin.x);
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let yRatio = (ny - origin.y) / (y - origin.y);
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if (keepAspectRatio)
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xRatio = yRatio = Math.min(xRatio, yRatio);
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if (Number.isFinite(xRatio)) {
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let left = this.original.x;
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let right = this.original.x + this.original.w;
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left = (left - origin.x) * xRatio + origin.x;
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right = (right - origin.x) * xRatio + origin.x;
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this.x = left;
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this.w = right - left;
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}
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if (Number.isFinite(yRatio)) {
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let top = this.original.y;
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let bottom = this.original.y + this.original.h;
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top = (top - origin.y) * yRatio + origin.y;
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bottom = (bottom - origin.y) * yRatio + origin.y;
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this.y = top;
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this.h = bottom - top;
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}
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},
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};
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};
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return [
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_createHandle(this.x, this.y),
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_createHandle(this.x + this.w, this.y),
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_createHandle(this.x, this.y + this.h),
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_createHandle(this.x + this.w, this.y + this.h),
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];
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},
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};
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};
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// Mouse move handler. As always, also renders cursor
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state.movecb = (evn) => {
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ovCtx.clearRect(0, 0, ovCanvas.width, ovCanvas.height);
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uiCtx.clearRect(0, 0, uiCanvas.width, uiCanvas.height);
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imageCollection.inputElement.style.cursor = "auto";
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state.lastMouseTarget = evn.target;
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state.lastMouseMove = evn;
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let x = evn.x;
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let y = evn.y;
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if (state.snapToGrid) {
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x += snap(evn.x, 0, 64);
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y += snap(evn.y, 0, 64);
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}
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const vpc = viewport.canvasToView(x, y);
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uiCtx.save();
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// Update scale
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if (state.scaling) {
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state.scaling.scaleTo(x, y, state.keepAspectRatio);
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}
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// Update position
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if (state.moving) {
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state.selected.x = x - state.moving.offset.x;
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state.selected.y = y - state.moving.offset.y;
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state.selected.updateOriginal();
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}
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// Draw dragging box
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if (state.dragging) {
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uiCtx.setLineDash([2, 2]);
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uiCtx.lineWidth = 1;
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uiCtx.strokeStyle = "#FFF";
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const ix = state.dragging.ix;
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const iy = state.dragging.iy;
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const bb = selectionBB(ix, iy, x, y);
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const bbvp = {
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...viewport.canvasToView(bb.x, bb.y),
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w: viewport.zoom * bb.w,
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h: viewport.zoom * bb.h,
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};
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uiCtx.strokeRect(bbvp.x, bbvp.y, bbvp.w, bbvp.h);
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uiCtx.setLineDash([]);
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}
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if (state.selected) {
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ovCtx.lineWidth = 1;
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ovCtx.strokeStyle = "#FFF";
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const bb = {
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x: state.selected.x,
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y: state.selected.y,
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w: state.selected.w,
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h: state.selected.h,
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};
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const bbvp = {
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...viewport.canvasToView(bb.x, bb.y),
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w: viewport.zoom * bb.w,
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h: viewport.zoom * bb.h,
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};
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// Draw Image
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ovCtx.drawImage(
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state.selected.image,
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0,
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0,
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state.selected.image.width,
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state.selected.image.height,
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state.selected.x,
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state.selected.y,
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state.selected.w,
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state.selected.h
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);
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// Draw selection box
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uiCtx.strokeStyle = "#FFF";
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console.debug(bbvp);
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uiCtx.setLineDash([4, 2]);
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uiCtx.strokeRect(bbvp.x, bbvp.y, bbvp.w, bbvp.h);
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uiCtx.setLineDash([]);
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// Draw Scaling/Rotation Origin
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uiCtx.beginPath();
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uiCtx.arc(
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bbvp.x + bbvp.w / 2,
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bbvp.y + bbvp.h / 2,
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5,
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0,
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2 * Math.PI
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);
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uiCtx.stroke();
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// Draw Scaling Handles
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let cursorInHandle = false;
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state.selected.handles().forEach((handle) => {
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const bbvph = {
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...viewport.canvasToView(handle.x, handle.y),
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w: viewport.zoom * handle.w,
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h: viewport.zoom * handle.h,
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};
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if (handle.contains(evn.x, evn.y)) {
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cursorInHandle = true;
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uiCtx.strokeRect(
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bbvph.x - 1,
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bbvph.y - 1,
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bbvph.w + 2,
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bbvph.h + 2
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);
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} else {
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uiCtx.strokeRect(bbvph.x, bbvph.y, bbvph.w, bbvph.h);
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}
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});
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// Change cursor
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if (cursorInHandle || state.selected.contains(evn.x, evn.y))
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imageCollection.inputElement.style.cursor = "pointer";
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}
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// Draw current cursor location
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uiCtx.lineWidth = 3;
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uiCtx.strokeStyle = "#FFF";
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uiCtx.beginPath();
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uiCtx.moveTo(vpc.x, vpc.y + 10);
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uiCtx.lineTo(vpc.x, vpc.y - 10);
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uiCtx.moveTo(vpc.x + 10, vpc.y);
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uiCtx.lineTo(vpc.x - 10, vpc.y);
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uiCtx.stroke();
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uiCtx.restore();
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};
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// Handles left mouse clicks
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state.clickcb = (evn) => {
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if (
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state.original.x === state.selected.x &&
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state.original.y === state.selected.y &&
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state.original.w === state.selected.w &&
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state.original.h === state.selected.h
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) {
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state.reset();
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return;
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}
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// If something is selected, commit changes to the canvas
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if (state.selected) {
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uil.ctx.drawImage(
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state.selected.image,
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state.original.x,
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state.original.y
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);
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commands.runCommand(
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"eraseImage",
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"Image Transform Erase",
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state.original
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);
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commands.runCommand(
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"drawImage",
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"Image Transform Draw",
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state.selected
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);
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state.original = null;
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state.selected = null;
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state.redraw();
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}
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};
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// Handles left mouse drag events
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state.dragstartcb = (evn) => {
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let ix = evn.ix;
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let iy = evn.iy;
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if (state.snapToGrid) {
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ix += snap(evn.ix, 0, 64);
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iy += snap(evn.iy, 0, 64);
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}
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// If is selected, check if drag is in handles/body and act accordingly
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if (state.selected) {
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const handles = state.selected.handles();
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const activeHandle = handles.find((v) =>
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v.contains(evn.ix, evn.iy)
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);
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if (activeHandle) {
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state.scaling = activeHandle;
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return;
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} else if (state.selected.contains(ix, iy)) {
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state.moving = {
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offset: {x: ix - state.selected.x, y: iy - state.selected.y},
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};
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return;
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}
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}
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// If it is not, just create new selection
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state.reset();
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state.dragging = {ix, iy};
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};
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// Handles left mouse drag end events
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state.dragendcb = (evn) => {
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let x = evn.x;
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let y = evn.y;
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if (state.snapToGrid) {
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x += snap(evn.x, 0, 64);
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y += snap(evn.y, 0, 64);
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}
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// If we are scaling, stop scaling and do some handler magic
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if (state.scaling) {
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state.selected.updateOriginal();
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state.scaling = null;
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// If we are moving the selection, just... stop
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} else if (state.moving) {
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state.moving = null;
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/**
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* If we are dragging, create a cutout selection area and save to an auxiliar image
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* We will be rendering the image to the overlay, so it will not be noticeable
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*/
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} else if (state.dragging) {
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state.original = selectionBB(
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state.dragging.ix,
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state.dragging.iy,
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x,
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y
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);
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state.selected = selectionBB(
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state.dragging.ix,
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state.dragging.iy,
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x,
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y
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);
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// Cut out selected portion of the image for manipulation
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const cvs = document.createElement("canvas");
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cvs.width = state.selected.w;
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cvs.height = state.selected.h;
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const ctx = cvs.getContext("2d");
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ctx.drawImage(
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uil.canvas,
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state.selected.x,
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state.selected.y,
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state.selected.w,
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state.selected.h,
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0,
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0,
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state.selected.w,
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state.selected.h
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);
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uil.ctx.clearRect(
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state.selected.x,
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state.selected.y,
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state.selected.w,
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state.selected.h
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);
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state.selected.image = cvs;
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state.original.image = cvs;
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if (state.selected.w === 0 || state.selected.h === 0)
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state.selected = null;
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state.dragging = null;
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}
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state.redraw();
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};
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// Handler for right clicks. Basically resets everything
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state.cancelcb = (evn) => {
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state.reset();
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};
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// Keyboard callbacks (For now, they just handle the "delete" key)
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state.keydowncb = (evn) => {};
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state.keyclickcb = (evn) => {
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switch (evn.code) {
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case "Delete":
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// Deletes selected area
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state.selected &&
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commands.runCommand("eraseImage", "Erase Area", state.selected);
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state.selected = null;
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state.redraw();
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}
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};
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// Register Ctrl-C/V Shortcut
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// Handles copying
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state.ctrlccb = (evn, cut = false) => {
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// We create a new canvas to store the data
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state.clipboard.copy = document.createElement("canvas");
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state.clipboard.copy.width = state.selected.w;
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state.clipboard.copy.height = state.selected.h;
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const ctx = state.clipboard.copy.getContext("2d");
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ctx.clearRect(0, 0, state.selected.w, state.selected.h);
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ctx.drawImage(
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state.selected.image,
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0,
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0,
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state.selected.image.width,
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state.selected.image.height,
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0,
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0,
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state.selected.w,
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state.selected.h
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);
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// If cutting, we reverse the selection and erase the selection area
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if (cut) {
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const aux = state.original;
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state.reset();
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commands.runCommand("eraseImage", "Cut Image", aux);
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}
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// Because firefox needs manual activation of the feature
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if (state.useClipboard) {
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// Send to clipboard
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state.clipboard.copy.toBlob((blob) => {
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const item = new ClipboardItem({"image/png": blob});
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navigator.clipboard &&
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navigator.clipboard.write([item]).catch((e) => {
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console.warn("Error sending to clipboard");
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console.warn(e);
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});
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});
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}
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};
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// Handles pasting
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state.ctrlvcb = (evn) => {
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if (state.useClipboard) {
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// If we use the clipboard, do some proccessing of clipboard data (ugly but kind of minimum required)
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navigator.clipboard &&
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navigator.clipboard.read().then((items) => {
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for (const item of items) {
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for (const type of item.types) {
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if (type.startsWith("image/")) {
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item.getType(type).then((blob) => {
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// Converts blob to image
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const url = window.URL || window.webkitURL;
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const image = document.createElement("img");
|
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image.src = url.createObjectURL(file);
|
|
tools.stamp.enable({
|
|
image,
|
|
back: tools.selecttransform.enable,
|
|
});
|
|
});
|
|
}
|
|
}
|
|
}
|
|
});
|
|
} else if (state.clipboard.copy) {
|
|
// Use internal clipboard
|
|
const image = document.createElement("img");
|
|
image.src = state.clipboard.copy.toDataURL();
|
|
|
|
// Send to stamp, as clipboard temporary data
|
|
tools.stamp.enable({
|
|
image,
|
|
back: tools.selecttransform.enable,
|
|
});
|
|
}
|
|
};
|
|
|
|
// Cut shortcut. Basically, send to copy handler
|
|
state.ctrlxcb = (evn) => {
|
|
state.ctrlccb(evn, true);
|
|
};
|
|
},
|
|
populateContextMenu: (menu, state) => {
|
|
if (!state.ctxmenu) {
|
|
state.ctxmenu = {};
|
|
|
|
// Snap To Grid Checkbox
|
|
state.ctxmenu.snapToGridLabel = _toolbar_input.checkbox(
|
|
state,
|
|
"snapToGrid",
|
|
"Snap To Grid"
|
|
).label;
|
|
|
|
// Keep Aspect Ratio
|
|
state.ctxmenu.keepAspectRatioLabel = _toolbar_input.checkbox(
|
|
state,
|
|
"keepAspectRatio",
|
|
"Keep Aspect Ratio"
|
|
).label;
|
|
|
|
// Use Clipboard
|
|
const clipboardCheckbox = _toolbar_input.checkbox(
|
|
state,
|
|
"useClipboard",
|
|
"Use clipboard"
|
|
);
|
|
state.ctxmenu.useClipboardLabel = clipboardCheckbox.label;
|
|
if (!(navigator.clipboard && navigator.clipboard.write))
|
|
clipboardCheckbox.checkbox.disabled = true; // Disable if not available
|
|
|
|
// Some useful actions to do with selection
|
|
const actionArray = document.createElement("div");
|
|
actionArray.classList.add("button-array");
|
|
|
|
// Save button
|
|
const saveSelectionButton = document.createElement("button");
|
|
saveSelectionButton.classList.add("button", "tool");
|
|
saveSelectionButton.textContent = "Save";
|
|
saveSelectionButton.title = "Saves Selection";
|
|
saveSelectionButton.onclick = () => {
|
|
downloadCanvas({
|
|
cropToContent: false,
|
|
canvas: state.selected.image,
|
|
});
|
|
};
|
|
|
|
// Save as Resource Button
|
|
const createResourceButton = document.createElement("button");
|
|
createResourceButton.classList.add("button", "tool");
|
|
createResourceButton.textContent = "Resource";
|
|
createResourceButton.title = "Saves Selection as a Resource";
|
|
createResourceButton.onclick = () => {
|
|
const image = document.createElement("img");
|
|
image.src = state.selected.image.toDataURL();
|
|
image.onload = () => {
|
|
tools.stamp.state.addResource("Selection Resource", image);
|
|
tools.stamp.enable();
|
|
};
|
|
};
|
|
|
|
actionArray.appendChild(saveSelectionButton);
|
|
actionArray.appendChild(createResourceButton);
|
|
|
|
// Disable buttons (if nothing is selected)
|
|
state.ctxmenu.disableButtons = () => {
|
|
saveSelectionButton.disabled = true;
|
|
createResourceButton.disabled = true;
|
|
};
|
|
|
|
// Disable buttons (if something is selected)
|
|
state.ctxmenu.enableButtons = () => {
|
|
saveSelectionButton.disabled = "";
|
|
createResourceButton.disabled = "";
|
|
};
|
|
state.ctxmenu.actionArray = actionArray;
|
|
}
|
|
menu.appendChild(state.ctxmenu.snapToGridLabel);
|
|
menu.appendChild(document.createElement("br"));
|
|
menu.appendChild(state.ctxmenu.keepAspectRatioLabel);
|
|
menu.appendChild(document.createElement("br"));
|
|
menu.appendChild(state.ctxmenu.useClipboardLabel);
|
|
menu.appendChild(state.ctxmenu.actionArray);
|
|
},
|
|
shortcut: "S",
|
|
}
|
|
);
|