Auto-save LoRAs

ui/media/js/multi-model-selector.js

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+/**
+ * A component consisting of multiple model dropdowns, along with a "weight" field per model.
+ *
+ * Behaves like a single input element, giving an object in response to the .value field.
+ *
+ * Inspired by the design of the ModelDropdown component (searchable-models.js).
+ */
+
+class MultiModelSelector {
+    root
+    modelType
+    modelNameFriendly
+    defaultWeight
+    weightStep
+
+    modelContainer
+    addNewButton
+
+    counter = 0
+
+    /* MIMIC A REGULAR INPUT FIELD */
+    get id() {
+        return this.root.id
+    }
+    get parentElement() {
+        return this.root.parentElement
+    }
+    get parentNode() {
+        return this.root.parentNode
+    }
+    get value() {
+        let modelNames = []
+        let modelWeights = []
+
+        this.modelElements.forEach((e) => {
+            modelNames.push(e.name.value)
+            modelWeights.push(e.weight.value)
+        })
+
+        return { modelNames: modelNames, modelWeights: modelWeights }
+    }
+    set value(modelData) {
+        if (typeof modelData !== "object") {
+            throw new Error("Multi-model selector expects an object containing modelNames and modelWeights as keys!")
+        }
+        if (!("modelNames" in modelData) || !("modelWeights" in modelData)) {
+            throw new Error("modelNames or modelWeights not present in the data passed to the multi-model selector")
+        }
+
+        let newModelNames = modelData["modelNames"]
+        let newModelWeights = modelData["modelWeights"]
+        if (newModelNames.length !== newModelWeights.length) {
+            throw new Error("Need to pass an equal number of modelNames and modelWeights!")
+        }
+
+        // expand or shrink entries
+        let currElements = this.modelElements
+        if (currElements.length < newModelNames.length) {
+            for (let i = currElements.length; i < newModelNames.length; i++) {
+                this.addModelEntry()
+            }
+        } else {
+            for (let i = newModelNames.length; i < currElements.length; i++) {
+                this.removeModelEntry()
+            }
+        }
+
+        // assign to the corresponding elements
+        currElements = this.modelElements
+        for (let i = 0; i < newModelNames.length; i++) {
+            let curr = currElements[i]
+
+            // update weight first, name second.
+            // for some unholy reason this order matters for dispatch chains
+            // the root of all this unholiness is because searchable-models automatically dispatches an update event
+            // as soon as the value is updated via JS, which is against the DOM pattern of not dispatching an event automatically
+            // unless the caller explicitly dispatches the event.
+            curr.weight.value = newModelWeights[i]
+            curr.name.value = newModelNames[i]
+        }
+    }
+    get disabled() {
+        return false
+    }
+    set disabled(state) {
+        // do nothing
+    }
+    get modelElements() {
+        let entries = this.root.querySelectorAll(".model_entry")
+        entries = [...entries]
+        let elements = entries.map((e) => {
+            return { name: e.querySelector(".model_name").field, weight: e.querySelector(".model_weight") }
+        })
+        return elements
+    }
+    addEventListener(type, listener, options) {
+        // do nothing
+    }
+    dispatchEvent(event) {
+        // do nothing
+    }
+    appendChild(option) {
+        // do nothing
+    }
+
+    // remember 'this' - http://blog.niftysnippets.org/2008/04/you-must-remember-this.html
+    bind(f, obj) {
+        return function() {
+            return f.apply(obj, arguments)
+        }
+    }
+
+    constructor(root, modelType, modelNameFriendly = undefined, defaultWeight = 0.5, weightStep = 0.02) {
+        this.root = root
+        this.modelType = modelType
+        this.modelNameFriendly = modelNameFriendly || modelType
+        this.defaultWeight = defaultWeight
+        this.weightStep = weightStep
+
+        let self = this
+        document.addEventListener("refreshModels", function() {
+            setTimeout(self.bind(self.populateModels, self), 1)
+        })
+
+        this.createStructure()
+        this.populateModels()
+    }
+
+    createStructure() {
+        this.modelContainer = document.createElement("div")
+        this.modelContainer.className = "model_entries"
+        this.root.appendChild(this.modelContainer)
+
+        this.addNewButton = document.createElement("button")
+        this.addNewButton.className = "add_model_entry"
+        this.addNewButton.innerHTML = '<i class="fa-solid fa-plus"></i> add another ' + this.modelNameFriendly
+        this.addNewButton.addEventListener("click", this.bind(this.addModelEntry, this))
+        this.root.appendChild(this.addNewButton)
+    }
+
+    populateModels() {
+        if (this.root.dataset.path === "") {
+            if (this.length === 0) {
+                this.addModelEntry() // create a single blank entry
+            }
+        } else {
+            this.value = JSON.parse(this.root.dataset.path)
+        }
+    }
+
+    addModelEntry() {
+        let idx = this.counter++
+        let currLength = this.length
+
+        const modelElement = document.createElement("div")
+        modelElement.className = "model_entry"
+        modelElement.innerHTML = `
+            <input id="${this.modelType}_${idx}" class="model_name model-filter" type="text" spellcheck="false" autocomplete="off" data-path="" />
+            <input class="model_weight" type="number" step="${this.weightStep}" style="width: 50pt" value="${this.defaultWeight}" pattern="^-?[0-9]*\.?[0-9]*$" onkeypress="preventNonNumericalInput(event)">
+        `
+        this.modelContainer.appendChild(modelElement)
+
+        let modelNameEl = modelElement.querySelector(".model_name")
+        modelNameEl.field = new ModelDropdown(modelNameEl, this.modelType, "None")
+        let modelWeightEl = modelElement.querySelector(".model_weight")
+
+        let self = this
+
+        function makeUpdateEvent(type) {
+            return function(e) {
+                e.stopPropagation()
+
+                let modelData = self.value
+                self.root.dataset.path = JSON.stringify(modelData)
+
+                self.root.dispatchEvent(new Event(type))
+            }
+        }
+
+        modelNameEl.addEventListener("change", makeUpdateEvent("change"))
+        modelNameEl.addEventListener("input", makeUpdateEvent("input"))
+        modelWeightEl.addEventListener("change", makeUpdateEvent("change"))
+        modelWeightEl.addEventListener("input", makeUpdateEvent("input"))
+
+        let removeBtn = document.createElement("button")
+        removeBtn.className = "remove_model_btn"
+        removeBtn.setAttribute("title", "Remove model")
+        removeBtn.innerHTML = '<i class="fa-solid fa-minus"></i>'
+
+        if (currLength === 0) {
+            removeBtn.classList.add("displayNone")
+        }
+
+        removeBtn.addEventListener(
+            "click",
+            this.bind(function(e) {
+                this.modelContainer.removeChild(modelElement)
+
+                makeUpdateEvent("change")(e)
+            }, this)
+        )
+
+        modelElement.appendChild(removeBtn)
+    }
+
+    removeModelEntry() {
+        if (this.length === 0) {
+            return
+        }
+
+        let lastEntry = this.modelContainer.lastElementChild
+        lastEntry.remove()
+    }
+
+    get length() {
+        return this.modelContainer.childElementCount
+    }
+}