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Refactor crop editor into a proper class.

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This commit is contained in:
Aaron van Geffen 2020-10-19 19:59:54 +02:00
parent 909d50efa8
commit fd84e1c9f8
1 changed files with 204 additions and 202 deletions
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406
public/js/crop_editor.js
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@ -1,218 +1,220 @@
function CropEditor(opt) { class CropEditor {
this.opt = opt; constructor(opt) {
this.opt = opt;
this.edit_crop_button = document.createElement("span"); this.edit_crop_button = document.createElement("span");
this.edit_crop_button.className = "btn"; this.edit_crop_button.className = "btn";
this.edit_crop_button.innerHTML = "Edit crop"; this.edit_crop_button.textContent = "Edit crop";
this.edit_crop_button.addEventListener('click', this.show.bind(this)); this.edit_crop_button.addEventListener('click', this.show.bind(this));
this.thumbnail_select = document.getElementById(opt.thumbnail_select_id); this.thumbnail_select = document.getElementById(opt.thumbnail_select_id);
this.thumbnail_select.addEventListener('change', this.toggleCropButton.bind(this)); this.thumbnail_select.addEventListener('change', this.toggleCropButton.bind(this));
this.thumbnail_select.parentNode.insertBefore(this.edit_crop_button, this.thumbnail_select.nextSibling); this.thumbnail_select.parentNode.insertBefore(this.edit_crop_button, this.thumbnail_select.nextSibling);
this.toggleCropButton(); this.toggleCropButton();
}
CropEditor.prototype.buildContainer = function() {
this.container = document.createElement("div");
this.container.id = "crop_editor";
this.position = document.createElement("div");
this.position.className = "crop_position";
this.container.appendChild(this.position);
var source_x_label = document.createTextNode("Source X:");
this.position.appendChild(source_x_label);
this.source_x = document.createElement("input");
this.source_x.addEventListener("keyup", this.positionBoundary.bind(this));
this.position.appendChild(this.source_x);
var source_y_label = document.createTextNode("Source Y:");
this.position.appendChild(source_y_label);
this.source_y = document.createElement("input");
this.source_y.addEventListener("keyup", this.positionBoundary.bind(this));
this.position.appendChild(this.source_y);
var crop_width_label = document.createTextNode("Crop width:");
this.position.appendChild(crop_width_label);
this.crop_width = document.createElement("input");
this.crop_width.addEventListener("keyup", this.positionBoundary.bind(this));
this.position.appendChild(this.crop_width);
var crop_height_label = document.createTextNode("Crop height:");
this.position.appendChild(crop_height_label);
this.crop_height = document.createElement("input");
this.crop_height.addEventListener("keyup", this.positionBoundary.bind(this));
this.position.appendChild(this.crop_height);
this.save_button = document.createElement("span");
this.save_button.className = "btn";
this.save_button.innerHTML = "Save";
this.save_button.addEventListener('click', this.save.bind(this));
this.position.appendChild(this.save_button);
this.abort_button = document.createElement("span");
this.abort_button.className = "btn btn-red";
this.abort_button.innerHTML = "Abort";
this.abort_button.addEventListener('click', this.hide.bind(this));
this.position.appendChild(this.abort_button);
this.image_container = document.createElement("div");
this.image_container.className = "crop_image_container";
this.container.appendChild(this.image_container);
this.crop_boundary = document.createElement("div");
this.crop_boundary.id = "crop_boundary";
this.image_container.appendChild(this.crop_boundary);
this.original_image = document.createElement("img");
this.original_image.id = "original_image";
this.original_image.src = this.opt.original_image_src;
this.image_container.appendChild(this.original_image);
this.parent = document.getElementById(this.opt.editor_container_parent_id);
this.parent.appendChild(this.container);
};
CropEditor.prototype.setInputValues = function() {
var current = this.thumbnail_select.options[this.thumbnail_select.selectedIndex].dataset;
if (typeof current.crop_region === "undefined") {
var source_ratio = this.original_image.naturalWidth / this.original_image.naturalHeight,
crop_ratio = current.crop_width / current.crop_height,
min_dim = Math.min(this.original_image.naturalWidth, this.original_image.naturalHeight);
// Cropping from the centre?
if (current.crop_method === "c") {
// Crop vertically from the centre, using the entire width.
if (source_ratio < crop_ratio) {
this.crop_width.value = this.original_image.naturalWidth;
this.crop_height.value = Math.ceil(this.original_image.naturalWidth / crop_ratio);
this.source_x.value = 0;
this.source_y.value = Math.ceil((this.original_image.naturalHeight - this.crop_height.value) / 2);
}
// Crop horizontally from the centre, using the entire height.
else {
this.crop_width.value = Math.ceil(current.crop_width * this.original_image.naturalHeight / current.crop_height);
this.crop_height.value = this.original_image.naturalHeight;
this.source_x.value = Math.ceil((this.original_image.naturalWidth - this.crop_width.value) / 2);
this.source_y.value = 0;
}
}
// Cropping a top or bottom slice?
else {
// Can we actually take a top or bottom slice from the original image?
if (source_ratio < crop_ratio) {
this.crop_width.value = this.original_image.naturalWidth;
this.crop_height.value = Math.floor(this.original_image.naturalHeight / crop_ratio);
this.source_x.value = "0";
this.source_y.value = current.crop_method.indexOf("t") !== -1 ? "0" : this.original_image.naturalHeight - this.crop_height.value;
}
// Otherwise, take a vertical slice from the centre.
else {
this.crop_width.value = Math.floor(this.original_image.naturalHeight * crop_ratio);
this.crop_height.value = this.original_image.naturalHeight;
this.source_x.value = Math.floor((this.original_image.naturalWidth - this.crop_width.value) / 2);
this.source_y.value = "0";
}
}
} else {
var region = current.crop_region.split(',');
this.crop_width.value = region[0];
this.crop_height.value = region[1];
this.source_x.value = region[2];
this.source_y.value = region[3];
}
};
CropEditor.prototype.showContainer = function() {
this.container.style.display = "block";
this.setInputValues();
this.positionBoundary();
}
CropEditor.prototype.save = function() {
var current = this.thumbnail_select.options[this.thumbnail_select.selectedIndex].dataset;
var payload = {
thumb_width: current.crop_width,
thumb_height: current.crop_height,
crop_method: current.crop_method,
crop_width: this.crop_width.value,
crop_height: this.crop_height.value,
source_x: this.source_x.value,
source_y: this.source_y.value
};
var req = HttpRequest("post", this.opt.submitUrl + "?id=" + this.opt.asset_id + "&updatethumb",
"data=" + encodeURIComponent(JSON.stringify(payload)), function(response) {
this.opt.after_save(response);
this.hide();
}.bind(this));
};
CropEditor.prototype.show = function() {
if (typeof this.container === "undefined") {
this.buildContainer();
} }
// Defer showing and positioning until image is loaded. buildContainer() {
// !!! TODO: add a spinner in the mean time? this.container = document.createElement("div");
if (this.original_image.naturalWidth > 0) { this.container.id = "crop_editor";
this.showContainer();
} else { this.position = document.createElement("div");
this.original_image.addEventListener("load", function() { this.position.className = "crop_position";
this.container.appendChild(this.position);
let source_x_label = document.createTextNode("Source X:");
this.position.appendChild(source_x_label);
this.source_x = document.createElement("input");
this.source_x.addEventListener("keyup", this.positionBoundary.bind(this));
this.position.appendChild(this.source_x);
let source_y_label = document.createTextNode("Source Y:");
this.position.appendChild(source_y_label);
this.source_y = document.createElement("input");
this.source_y.addEventListener("keyup", this.positionBoundary.bind(this));
this.position.appendChild(this.source_y);
let crop_width_label = document.createTextNode("Crop width:");
this.position.appendChild(crop_width_label);
this.crop_width = document.createElement("input");
this.crop_width.addEventListener("keyup", this.positionBoundary.bind(this));
this.position.appendChild(this.crop_width);
let crop_height_label = document.createTextNode("Crop height:");
this.position.appendChild(crop_height_label);
this.crop_height = document.createElement("input");
this.crop_height.addEventListener("keyup", this.positionBoundary.bind(this));
this.position.appendChild(this.crop_height);
this.save_button = document.createElement("span");
this.save_button.className = "btn";
this.save_button.textContent = "Save";
this.save_button.addEventListener('click', this.save.bind(this));
this.position.appendChild(this.save_button);
this.abort_button = document.createElement("span");
this.abort_button.className = "btn btn-red";
this.abort_button.textContent = "Abort";
this.abort_button.addEventListener('click', this.hide.bind(this));
this.position.appendChild(this.abort_button);
this.image_container = document.createElement("div");
this.image_container.className = "crop_image_container";
this.container.appendChild(this.image_container);
this.crop_boundary = document.createElement("div");
this.crop_boundary.id = "crop_boundary";
this.image_container.appendChild(this.crop_boundary);
this.original_image = document.createElement("img");
this.original_image.id = "original_image";
this.original_image.src = this.opt.original_image_src;
this.image_container.appendChild(this.original_image);
this.parent = document.getElementById(this.opt.editor_container_parent_id);
this.parent.appendChild(this.container);
}
setInputValues() {
let current = this.thumbnail_select.options[this.thumbnail_select.selectedIndex].dataset;
if (typeof current.crop_region === "undefined") {
let source_ratio = this.original_image.naturalWidth / this.original_image.naturalHeight,
crop_ratio = current.crop_width / current.crop_height,
min_dim = Math.min(this.original_image.naturalWidth, this.original_image.naturalHeight);
// Cropping from the centre?
if (current.crop_method === "c") {
// Crop vertically from the centre, using the entire width.
if (source_ratio < crop_ratio) {
this.crop_width.value = this.original_image.naturalWidth;
this.crop_height.value = Math.ceil(this.original_image.naturalWidth / crop_ratio);
this.source_x.value = 0;
this.source_y.value = Math.ceil((this.original_image.naturalHeight - this.crop_height.value) / 2);
}
// Crop horizontally from the centre, using the entire height.
else {
this.crop_width.value = Math.ceil(current.crop_width * this.original_image.naturalHeight / current.crop_height);
this.crop_height.value = this.original_image.naturalHeight;
this.source_x.value = Math.ceil((this.original_image.naturalWidth - this.crop_width.value) / 2);
this.source_y.value = 0;
}
}
// Cropping a top or bottom slice?
else {
// Can we actually take a top or bottom slice from the original image?
if (source_ratio < crop_ratio) {
this.crop_width.value = this.original_image.naturalWidth;
this.crop_height.value = Math.floor(this.original_image.naturalHeight / crop_ratio);
this.source_x.value = "0";
this.source_y.value = current.crop_method.indexOf("t") !== -1 ? "0" : this.original_image.naturalHeight - this.crop_height.value;
}
// Otherwise, take a vertical slice from the centre.
else {
this.crop_width.value = Math.floor(this.original_image.naturalHeight * crop_ratio);
this.crop_height.value = this.original_image.naturalHeight;
this.source_x.value = Math.floor((this.original_image.naturalWidth - this.crop_width.value) / 2);
this.source_y.value = "0";
}
}
} else {
let region = current.crop_region.split(',');
this.crop_width.value = region[0];
this.crop_height.value = region[1];
this.source_x.value = region[2];
this.source_y.value = region[3];
}
}
showContainer() {
this.container.style.display = "block";
this.setInputValues();
this.positionBoundary();
}
save() {
let current = this.thumbnail_select.options[this.thumbnail_select.selectedIndex].dataset;
let payload = {
thumb_width: current.crop_width,
thumb_height: current.crop_height,
crop_method: current.crop_method,
crop_width: this.crop_width.value,
crop_height: this.crop_height.value,
source_x: this.source_x.value,
source_y: this.source_y.value
};
let req = HttpRequest("post", this.opt.submitUrl + "?id=" + this.opt.asset_id + "&updatethumb",
"data=" + encodeURIComponent(JSON.stringify(payload)), function(response) {
this.opt.after_save(response);
this.hide();
}.bind(this));
}
show() {
if (typeof this.container === "undefined") {
this.buildContainer();
}
// Defer showing and positioning until image is loaded.
// !!! TODO: add a spinner in the mean time?
if (this.original_image.naturalWidth > 0) {
this.showContainer(); this.showContainer();
}.bind(this)); } else {
this.original_image.addEventListener("load", function() {
this.showContainer();
}.bind(this));
}
} }
};
CropEditor.prototype.hide = function() { hide() {
this.container.style.display = "none"; this.container.style.display = "none";
}; }
CropEditor.prototype.addEvents = function(event) { addEvents(event) {
var drag_target = document.getElementById(opt.drag_target); let drag_target = document.getElementById(opt.drag_target);
drag_target.addEventListener('dragstart', this.dragStart); drag_target.addEventListener('dragstart', this.dragStart);
drag_target.addEventListener('drag', this.drag); drag_target.addEventListener('drag', this.drag);
drag_target.addEventListener('dragend', this.dragEnd); drag_target.addEventListener('dragend', this.dragEnd);
}; }
CropEditor.prototype.dragStart = function(event) { dragStart(event) {
console.log(event); console.log(event);
event.preventDefault(); event.preventDefault();
}; }
CropEditor.prototype.dragEnd = function(event) { dragEnd(event) {
console.log(event); console.log(event);
}; }
CropEditor.prototype.drag = function(event) { drag(event) {
console.log(event); console.log(event);
}; }
CropEditor.prototype.toggleCropButton = function() { toggleCropButton() {
var current = this.thumbnail_select.options[this.thumbnail_select.selectedIndex].dataset; let current = this.thumbnail_select.options[this.thumbnail_select.selectedIndex].dataset;
this.edit_crop_button.style.display = typeof current.crop_method === "undefined" ? "none" : ""; this.edit_crop_button.style.display = typeof current.crop_method === "undefined" ? "none" : "";
}; }
CropEditor.prototype.positionBoundary = function(event) { positionBoundary(event) {
var source_x = parseInt(this.source_x.value), let source_x = parseInt(this.source_x.value),
source_y = parseInt(this.source_y.value), source_y = parseInt(this.source_y.value),
crop_width = parseInt(this.crop_width.value), crop_width = parseInt(this.crop_width.value),
crop_height = parseInt(this.crop_height.value), crop_height = parseInt(this.crop_height.value),
real_width = this.original_image.naturalWidth, real_width = this.original_image.naturalWidth,
real_height = this.original_image.naturalHeight, real_height = this.original_image.naturalHeight,
scaled_width = this.original_image.clientWidth, scaled_width = this.original_image.clientWidth,
scaled_height = this.original_image.clientHeight; scaled_height = this.original_image.clientHeight;
var width_scale = scaled_width / real_width, let width_scale = scaled_width / real_width,
height_scale = scaled_height / real_height; height_scale = scaled_height / real_height;
crop_boundary.style.left = (this.source_x.value) * width_scale + "px"; crop_boundary.style.left = (this.source_x.value) * width_scale + "px";
crop_boundary.style.top = (this.source_y.value) * height_scale + "px"; crop_boundary.style.top = (this.source_y.value) * height_scale + "px";
crop_boundary.style.width = (this.crop_width.value) * width_scale + "px"; crop_boundary.style.width = (this.crop_width.value) * width_scale + "px";
crop_boundary.style.height = (this.crop_height.value) * height_scale + "px"; crop_boundary.style.height = (this.crop_height.value) * height_scale + "px";
}; }
}