feat: resetChatHistory function on a LlamaChatSession (#327)

* feat: `resetChatHistory` function on a `LlamaChatSession`
* feat: copy model response in the example Electron app template

.vitepress/utils/parseCmakeListsTxtOptions.ts

@@ -1,18 +1,28 @@
+const maxLinesSpan = 10;
+
 export function parseCmakeListsTxtOptions(cmakeListsTxtString: string) {
     const lines = cmakeListsTxtString.split("\n");
 
     return lines
         .map((line, index) => {
-            const match = line.match(/^option\([\s\t\n\r]*(?<key>\S+)[\s\t\n\r]+"(?<description>(?:\\"|[^"])*)"[\s\t\n\r]+(?<defaultValue>\S+)[\s\t\n\r]*\)/);
-            if (match == null || match.groups == null)
+            const match = lines
+                .slice(index, index + maxLinesSpan)
+                .join("\n")
+                .match(
+                    /^option\([\s\t\n\r]*(?<key>\S+)[\s\t\n\r]+"(?<description>(?:\\"|[^"])*)"[\s\t\n\r]+(?<defaultValue>\S+)[\s\t\n\r]*\)/
+                );
+            if (match == null || match.groups == null || match?.index !== 0)
                 return null;
 
+            const totalLines = match[0]?.split("\n")?.length ?? 1;
+
             const {key, description, defaultValue} = match.groups;
             if (key == null)
                 return null;
 
             return {
                 lineNumber: index + 1,
+                totalLines,
                 key,
                 description: description != null
                     ? description.replaceAll('\\"', '"')

docs/guide/cmakeOptions.data.ts

@@ -45,7 +45,10 @@ function renderCmakeOptionsTable(cmakeOptions: ReturnType<typeof parseCmakeOptio
             "Default value"
         ].map(htmlEscape),
         cmakeOptions.map((option) => {
-            const url = githubFileUrl + "#L" + option.lineNumber;
+            let url = githubFileUrl + "#L" + option.lineNumber;
+
+            if (option.totalLines > 1)
+                url += "-L" + (option.lineNumber + option.totalLines - 1);
 
             return [
                 `<a href=${JSON.stringify(url)}>` +

src/cli/recommendedModels.ts

@@ -259,6 +259,45 @@ export const recommendedModels: ModelRecommendation[] = [{
         }
     }]
 }, */ {
+    name: "OLMoE 1b 7B MoE",
+    abilities: ["chat"],
+    description: "OLMoE models were created by AllenAI, and are fully open source models that utilize a Mixture of Experts architecture" +
+        "Mixtures of Experts (MoE) is a technique where different models, each skilled in solving a particular kind of problem, work together to the improve the overall performance on complex tasks.\n" +
+        "This model includes 64 expert models, with a total of 7 billion parameters.\n" +
+        "This model generates output extremely fast.",
+
+    fileOptions: [{
+        huggingFace: {
+            model: "allenai/OLMoE-1B-7B-0924-Instruct-GGUF",
+            branch: "main",
+            file: "olmoe-1b-7b-0924-instruct-q8_0.gguf"
+        }
+    }, {
+        huggingFace: {
+            model: "allenai/OLMoE-1B-7B-0924-Instruct-GGUF",
+            branch: "main",
+            file: "olmoe-1b-7b-0924-instruct-q6_k.gguf"
+        }
+    }, {
+        huggingFace: {
+            model: "allenai/OLMoE-1B-7B-0924-Instruct-GGUF",
+            branch: "main",
+            file: "olmoe-1b-7b-0924-instruct-q5_k_m.gguf"
+        }
+    }, {
+        huggingFace: {
+            model: "allenai/OLMoE-1B-7B-0924-Instruct-GGUF",
+            branch: "main",
+            file: "olmoe-1b-7b-0924-instruct-q4_k_s.gguf"
+        }
+    }, {
+        huggingFace: {
+            model: "allenai/OLMoE-1B-7B-0924-Instruct-GGUF",
+            branch: "main",
+            file: "olmoe-1b-7b-0924-instruct-q4_k_m.gguf"
+        }
+    }]
+}, {
     name: "Gemma 2 9B",
     abilities: ["chat", "complete"],
     description: "Gemma models were created by Google and are optimized suited for variety of text generation tasks, " +

src/evaluator/LlamaChatSession/LlamaChatSession.ts

@@ -289,6 +289,8 @@ export class LlamaChatSession {
     /** @internal */ private readonly _disposeAggregator = new DisposeAggregator();
     /** @internal */ private readonly _autoDisposeSequence: boolean;
     /** @internal */ private readonly _contextShift?: LlamaChatSessionContextShiftOptions;
+    /** @internal */ private readonly _forceAddSystemPrompt: boolean;
+    /** @internal */ private readonly _systemPrompt?: string;
     /** @internal */ private readonly _chatLock = {};
     /** @internal */ private _chatHistory: ChatHistoryItem[];
     /** @internal */ private _lastEvaluation?: LlamaChatResponse["lastEvaluation"];
@@ -315,6 +317,8 @@ export class LlamaChatSession {
             throw new DisposedError();
 
         this._contextShift = contextShift;
+        this._forceAddSystemPrompt = forceAddSystemPrompt;
+        this._systemPrompt = systemPrompt;
 
         this._chat = new LlamaChat({
             autoDisposeSequence,
@@ -323,8 +327,8 @@ export class LlamaChatSession {
         });
 
         const chatWrapperSupportsSystemMessages = this._chat.chatWrapper.settings.supportsSystemMessages;
-        if (chatWrapperSupportsSystemMessages == null || chatWrapperSupportsSystemMessages || forceAddSystemPrompt)
-            this._chatHistory = this._chat.chatWrapper.generateInitialChatHistory({systemPrompt});
+        if (chatWrapperSupportsSystemMessages == null || chatWrapperSupportsSystemMessages || this._forceAddSystemPrompt)
+            this._chatHistory = this._chat.chatWrapper.generateInitialChatHistory({systemPrompt: this._systemPrompt});
         else
             this._chatHistory = [];
 
@@ -815,6 +819,20 @@ export class LlamaChatSession {
         this._lastEvaluation = undefined;
     }
 
+    /** Clear the chat history and reset it to the initial state. */
+    public resetChatHistory() {
+        if (this._chat == null || this.disposed)
+            throw new DisposedError();
+
+        const chatWrapperSupportsSystemMessages = this._chat.chatWrapper.settings.supportsSystemMessages;
+        if (chatWrapperSupportsSystemMessages == null || chatWrapperSupportsSystemMessages || this._forceAddSystemPrompt)
+            this.setChatHistory(
+                this._chat.chatWrapper.generateInitialChatHistory({systemPrompt: this._systemPrompt})
+            );
+        else
+            this.setChatHistory([]);
+    }
+
     /** @internal */
     private _stopAllPreloadAndPromptCompletions() {
         for (const abortController of this._preloadAndCompleteAbortControllers)

templates/electron-typescript-react/src/App/components/ChatHistory/ChatHistory.css

@@ -17,6 +17,8 @@
             margin-inline-end: 12px;
             color: var(--user-message-text-color);
             word-break: break-word;
+            max-width: calc(100% - 48px - 12px);
+            box-sizing: border-box;
 
             &:not(:first-child) {
                 margin-top: 36px;
@@ -28,6 +30,12 @@
             margin-inline-end: 48px;
             padding-inline-start: 24px;
             word-break: break-word;
+            max-width: calc(100% - 48px);
+            box-sizing: border-box;
+
+            &:hover + .buttons {
+                opacity: 1;
+            }
 
             &.active {
                 &:empty:after,
@@ -58,6 +66,15 @@
             margin-bottom: 0px;
         }
 
+        h2 {
+            margin: 16px 0px;
+            padding-top: 24px;
+        }
+
+        h3 {
+            margin: 32px 0px 0px 0px;
+        }
+
         table {
             display: block;
             border-style: hidden;
@@ -94,6 +111,20 @@
             }
         }
     }
+
+    > .buttons {
+        display: flex;
+        flex-direction: row;
+        padding: 8px 18px;
+        opacity: 0;
+
+        transition: opacity 0.1s ease-in-out;
+
+        &:hover,
+        &:focus-visible {
+            opacity: 1;
+        }
+    }
 }
 
 @keyframes activeModelMessageIndicator {

templates/electron-typescript-react/src/App/components/ChatHistory/ChatHistory.tsx

@@ -1,6 +1,7 @@
 import classNames from "classnames";
 import {LlmState} from "../../../../electron/state/llmState.ts";
 import {MarkdownContent} from "../MarkdownContent/MarkdownContent.js";
+import {MessageCopyButton} from "./components/MessageCopyButton/MessageCopyButton.js";
 
 import "./ChatHistory.css";
 
@@ -11,9 +12,16 @@ export function ChatHistory({simplifiedChat, generatingResult}: ChatHistoryProps
             simplifiedChat.map((item, index) => {
                 if (item.type === "model") {
                     const isActive = index === simplifiedChat.length - 1 && generatingResult;
-                    return <MarkdownContent key={index} className={classNames("message", "model", isActive && "active")}>
-                        {item.message}
-                    </MarkdownContent>;
+                    return <>
+                        <MarkdownContent key={index} className={classNames("message", "model", isActive && "active")}>
+                            {item.message}
+                        </MarkdownContent>
+                        {
+                            !isActive && <div className="buttons">
+                                <MessageCopyButton text={item.message} />
+                            </div>
+                        }
+                    </>;
 
                 } else if (item.type === "user")
                     return <MarkdownContent key={index} className="message user">

templates/electron-typescript-react/src/App/components/ChatHistory/components/MessageCopyButton/MessageCopyButton.css

@@ -0,0 +1,42 @@
+.appChatHistory > .buttons {
+    > .copyButton {
+        display: grid;
+        grid-template-areas: "icon";
+        padding: 6px;
+        border: none;
+
+        transition: background-color 0.1s ease-in-out;
+
+        &:not(:hover, :focus-visible) {
+            background-color: transparent;
+        }
+
+        &.copied {
+            > .icon.copy {
+                opacity: 0;
+                transition-delay: 0s;
+            }
+
+            > .icon.check {
+                opacity: 1;
+                transition-delay: 0.1s;
+            }
+        }
+
+        > .icon {
+            grid-area: icon;
+            width: 18px;
+            height: 18px;
+
+            transition: opacity 0.3s ease-in-out;
+
+            &.copy {
+                opacity: 1;
+                transition-delay: 0.1s;
+            }
+            &.check {
+                opacity: 0;
+            }
+        }
+    }
+}

templates/electron-typescript-react/src/App/components/ChatHistory/components/MessageCopyButton/MessageCopyButton.tsx

@@ -0,0 +1,38 @@
+import classNames from "classnames";
+import {useCallback, useState} from "react";
+import {CopyIconSVG} from "../../../../../icons/CopyIconSVG.js";
+import {CheckIconSVG} from "../../../../../icons/CheckIconSVG.js";
+
+import "./MessageCopyButton.css";
+
+const showCopiedTime = 1000 * 2;
+
+export function MessageCopyButton({text}: MessageCopyButtonProps) {
+    const [copies, setCopies] = useState(0);
+
+    const onClick = useCallback(() => {
+        navigator.clipboard.writeText(text)
+            .then(() => {
+                setCopies(copies + 1);
+
+                setTimeout(() => {
+                    setCopies(copies - 1);
+                }, showCopiedTime);
+            })
+            .catch((error) => {
+                console.error("Failed to copy text to clipboard", error);
+            });
+    }, [text]);
+
+    return <button
+        onClick={onClick}
+        className={classNames("copyButton", copies > 0 && "copied")}
+    >
+        <CopyIconSVG className="icon copy" />
+        <CheckIconSVG className="icon check" />
+    </button>;
+}
+
+type MessageCopyButtonProps = {
+    text: string
+};

templates/electron-typescript-react/src/icons/CheckIconSVG.tsx

@@ -0,0 +1,7 @@
+import {SVGProps} from "react";
+
+export function CheckIconSVG(props: SVGProps<SVGSVGElement>) {
+    return <svg height="24px" viewBox="0 -960 960 960" width="24px" {...props}>
+        <path d="M382-240 154-468l57-57 171 171 367-367 57 57-424 424Z"/>
+    </svg>;
+}

templates/electron-typescript-react/src/icons/CopyIconSVG.tsx

@@ -0,0 +1,7 @@
+import {SVGProps} from "react";
+
+export function CopyIconSVG(props: SVGProps<SVGSVGElement>) {
+    return <svg height="24px" viewBox="0 -960 960 960" width="24px" {...props}>
+        <path d="M360-240q-33 0-56.5-23.5T280-320v-480q0-33 23.5-56.5T360-880h360q33 0 56.5 23.5T800-800v480q0 33-23.5 56.5T720-240H360Zm0-80h360v-480H360v480ZM200-80q-33 0-56.5-23.5T120-160v-560h80v560h440v80H200Zm160-240v-480 480Z"/>
+    </svg>;
+}