feat: close #1415 clear context button

app/components/chat.module.scss

@@ -107,3 +107,68 @@
     user-select: text;
   }
 }
+
+.clear-context {
+  margin: 20px 0 0 0;
+  padding: 4px 0;
+
+  border-top: var(--border-in-light);
+  border-bottom: var(--border-in-light);
+  box-shadow: var(--card-shadow) inset;
+
+  display: flex;
+  justify-content: center;
+  align-items: center;
+
+  opacity: 0.5;
+  color: var(--black);
+  transition: all ease 0.3s;
+  cursor: pointer;
+  overflow: hidden;
+  position: relative;
+  font-size: 12px;
+
+  $linear: linear-gradient(
+    to right,
+    rgba(0, 0, 0, 0),
+    rgba(0, 0, 0, 1),
+    rgba(0, 0, 0, 0)
+  );
+  mask-image: $linear;
+
+  @mixin show {
+    transform: translateY(0);
+    position: relative;
+    transition: all ease 0.3s;
+    opacity: 1;
+  }
+
+  @mixin hide {
+    transform: translateY(-50%);
+    position: absolute;
+    transition: all ease 0.1s;
+    opacity: 0;
+  }
+
+  &-tips {
+    @include show;
+  }
+
+  &-revert-btn {
+    color: var(--primary);
+    @include hide;
+  }
+
+  &:hover {
+    opacity: 1;
+    border-color: var(--primary);
+
+    .clear-context-tips {
+      @include hide;
+    }
+
+    .clear-context-revert-btn {
+      @include show;
+    }
+  }
+}

app/components/chat.tsx

@@ -14,6 +14,8 @@ import MaskIcon from "../icons/mask.svg";
 import MaxIcon from "../icons/max.svg";
 import MinIcon from "../icons/min.svg";
 import ResetIcon from "../icons/reload.svg";
+import BreakIcon from "../icons/break.svg";
+import SettingsIcon from "../icons/chat-settings.svg";
 
 import LightIcon from "../icons/light.svg";
 import DarkIcon from "../icons/dark.svg";
@@ -51,7 +53,7 @@ import { IconButton } from "./button";
 import styles from "./home.module.scss";
 import chatStyle from "./chat.module.scss";
 
-import { ListItem, Modal, showModal } from "./ui-lib";
+import { ListItem, Modal, showModal, showToast } from "./ui-lib";
 import { useLocation, useNavigate } from "react-router-dom";
 import { LAST_INPUT_KEY, Path, REQUEST_TIMEOUT_MS } from "../constant";
 import { Avatar } from "./emoji";
@@ -289,6 +291,24 @@ export function PromptHints(props: {
   );
 }
 
+function ClearContextDivider() {
+  const chatStore = useChatStore();
+
+  return (
+    <div
+      className={chatStyle["clear-context"]}
+      onClick={() =>
+        chatStore.updateCurrentSession(
+          (session) => (session.clearContextIndex = -1),
+        )
+      }
+    >
+      <div className={chatStyle["clear-context-tips"]}>上下文已清除</div>
+      <div className={chatStyle["clear-context-revert-btn"]}>取消清除</div>
+    </div>
+  );
+}
+
 function useScrollToBottom() {
   // for auto-scroll
   const scrollRef = useRef<HTMLDivElement>(null);
@@ -321,6 +341,7 @@ export function ChatActions(props: {
 }) {
   const config = useAppConfig();
   const navigate = useNavigate();
+  const chatStore = useChatStore();
 
   // switch themes
   const theme = config.theme;
@@ -359,7 +380,7 @@ export function ChatActions(props: {
           className={`${chatStyle["chat-input-action"]} clickable`}
           onClick={props.showPromptModal}
         >
-          <BrainIcon />
+          <SettingsIcon />
         </div>
       )}
 
@@ -391,6 +412,22 @@ export function ChatActions(props: {
       >
         <MaskIcon />
       </div>
+
+      <div
+        className={`${chatStyle["chat-input-action"]} clickable`}
+        onClick={() => {
+          chatStore.updateCurrentSession((session) => {
+            if ((session.clearContextIndex ?? -1) > 0) {
+              session.clearContextIndex = -1;
+            } else {
+              session.clearContextIndex = session.messages.length;
+              session.memoryPrompt = ""; // will clear memory
+            }
+          });
+        }}
+      >
+        <BreakIcon />
+      </div>
     </div>
   );
 }
@@ -602,6 +639,12 @@ export function Chat() {
     context.push(copiedHello);
   }
 
+  // clear context index = context length + index in messages
+  const clearContextIndex =
+    (session.clearContextIndex ?? -1) >= 0
+      ? session.clearContextIndex! + context.length
+      : -1;
+
   // preview messages
   const messages = context
     .concat(session.messages as RenderMessage[])
@@ -736,7 +779,10 @@ export function Chat() {
             !(message.preview || message.content.length === 0);
           const showTyping = message.preview || message.streaming;
 
+          const shouldShowClearContextDivider = i === clearContextIndex - 1;
+
           return (
+            <>
               <div
                 key={i}
                 className={
@@ -816,6 +862,8 @@ export function Chat() {
                   )}
                 </div>
               </div>
+              {shouldShowClearContextDivider && <ClearContextDivider />}
+            </>
           );
         })}
       </div>

app/icons/break.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16" fill="none"><g opacity="1"  transform="translate(0 0)  rotate(0)"><g opacity="1"  transform="translate(2 2)  rotate(0)"><path  id="路径 1" style="fill:#333333; opacity:1;" d="M12.2752,-0.27515c0.261,0.26101 0.3915,0.57606 0.3915,0.94515v10.66c0,0.36907 -0.1305,0.68413 -0.3915,0.9452c-0.26107,0.261 -0.57613,0.3915 -0.9452,0.3915h-10.66c-0.36909,0 -0.68415,-0.1305 -0.94515,-0.3915c-0.26101,-0.26107 -0.39151,-0.57613 -0.39151,-0.9452v-10.66c0,-0.3691 0.1305,-0.68415 0.39151,-0.94515c0.26101,-0.26101 0.57606,-0.39151 0.94515,-0.39151h10.66c0.36907,0 0.68413,0.1305 0.9452,0.39151zM0.66667,11.33c0,0.0022 0.00111,0.0033 0.00333,0.0033h10.66c0.0022,0 0.0033,-0.0011 0.0033,-0.0033v-10.66c0,-0.00222 -0.0011,-0.00333 -0.0033,-0.00333l-10.66,0c-0.00222,0 -0.00333,0.00111 -0.00333,0.00333z"></path><path  id="路径 2" style="fill:#333333; opacity:1;" d="M8.47141,7.4714c-0.03095,0.03095 -0.06463,0.05859 -0.10103,0.08291c-0.0364,0.02432 -0.07482,0.04486 -0.11526,0.06161c-0.04044,0.01675 -0.08213,0.0294 -0.12506,0.03794c-0.04293,0.00854 -0.08629,0.01281 -0.13006,0.01281c-0.04377,0 -0.08713,-0.00427 -0.13006,-0.01281c-0.04293,-0.00854 -0.08462,-0.02119 -0.12506,-0.03794c-0.04045,-0.01675 -0.07887,-0.03729 -0.11526,-0.06161c-0.0364,-0.02432 -0.07007,-0.05196 -0.10102,-0.08291l-1.5286,-1.52859l-1.52859,1.52859c-0.06251,0.06251 -0.13461,0.11069 -0.21629,0.14452c-0.08167,0.03383 -0.16671,0.05075 -0.25512,0.05075c-0.08841,0 -0.17345,-0.01692 -0.25512,-0.05075c-0.08168,-0.03383 -0.15377,-0.08201 -0.21628,-0.14452l-1.5286,-1.52859l-1.52859,1.52859c-0.06251,0.06251 -0.13461,0.11069 -0.21628,0.14452c-0.08168,0.03383 -0.16672,0.05075 -0.25512,0.05075c-0.08841,0 -0.17345,-0.01692 -0.25512,-0.05075c-0.08168,-0.03383 -0.15377,-0.08201 -0.21628,-0.14452c-0.03095,-0.03095 -0.05859,-0.06463 -0.08291,-0.10102c-0.02432,-0.0364 -0.04485,-0.07482 -0.06161,-0.11526c-0.01675,-0.04044 -0.0294,-0.08213 -0.03794,-0.12506c-0.00854,-0.04293 -0.01281,-0.08629 -0.01281,-0.13006c0,-0.04377 0.00427,-0.08713 0.01281,-0.13006c0.00854,-0.04293 0.02119,-0.08462 0.03794,-0.12506c0.01675,-0.04045 0.03729,-0.07887 0.06161,-0.11526c0.02432,-0.0364 0.05196,-0.07008 0.08291,-0.10103l2,-2c0.06251,-0.06251 0.1346,-0.11068 0.21628,-0.14451c0.08167,-0.03383 0.16671,-0.05075 0.25512,-0.05075c0.08841,0 0.17345,0.01692 0.25512,0.05075c0.08168,0.03383 0.15378,0.08201 0.21629,0.14452l1.52859,1.52859l1.5286,-1.52859c0.03095,-0.03095 0.06463,-0.05859 0.10102,-0.08291c0.03639,-0.02432 0.07481,-0.04486 0.11526,-0.06161c0.04044,-0.01675 0.08213,-0.0294 0.12506,-0.03794c0.04293,-0.00854 0.08629,-0.01281 0.13006,-0.01281c0.04377,0 0.08713,0.00427 0.13006,0.01281c0.04293,0.00854 0.08462,0.02119 0.12506,0.03794c0.04044,0.01675 0.07886,0.03729 0.11526,0.06161c0.0364,0.02432 0.07008,0.05196 0.10103,0.08291l1.52859,1.52859l1.5286,-1.52859c0.03095,-0.03095 0.06462,-0.05859 0.10102,-0.08291c0.03639,-0.02432 0.07481,-0.04486 0.11526,-0.06161c0.04044,-0.01675 0.08213,-0.0294 0.12506,-0.03794c0.04293,-0.00854 0.08629,-0.01281 0.13006,-0.01281c0.0438,0 0.08717,0.00427 0.1301,0.01281c0.04293,0.00854 0.0846,0.02119 0.125,0.03794c0.04047,0.01675 0.0789,0.03729 0.1153,0.06161c0.0364,0.02432 0.07007,0.05196 0.101,0.08291l2,2c0.03093,0.03095 0.05857,0.06462 0.0829,0.10102c0.02433,0.03639 0.04487,0.07481 0.0616,0.11526c0.01673,0.04044 0.0294,0.08213 0.038,0.12506c0.00853,0.04293 0.0128,0.08629 0.0128,0.13006c0,0.04377 -0.00427,0.08713 -0.0128,0.13006c-0.0086,0.04293 -0.02127,0.08462 -0.038,0.12506c-0.01673,0.04044 -0.03727,0.07886 -0.0616,0.11526c-0.02433,0.03639 -0.05197,0.07007 -0.0829,0.10102c-0.06253,0.06251 -0.13463,0.11069 -0.2163,0.14452c-0.08167,0.03383 -0.1667,0.05075 -0.2551,0.05075c-0.0884,0 -0.17343,-0.01692 -0.2551,-0.05075c-0.08167,-0.03383 -0.15377,-0.08201 -0.2163,-0.14452l-1.5286,-1.52859z"></path></g><g opacity="1"  transform="translate(0 0)  rotate(0)"><mask id="bg-mask-0" fill="white"><use xlink:href="#path_0"></use></mask><g mask="url(#bg-mask-0)" ></g></g></g><defs><rect id="path_0" x="0" y="0" width="16" height="16" /></defs></svg>

app/locales/cn.ts

@@ -160,12 +160,11 @@ const cn = {
     BotHello: "有什么可以帮你的吗",
     Error: "出错了，稍后重试吧",
     Prompt: {
-      History: (content: string) =>
+      History: (content: string) => "这是历史聊天总结作为前情提要：" + content,
-        "这是 ai 和用户的历史聊天总结作为前情提要：" + content,
       Topic:
         "使用四到五个字直接返回这句话的简要主题，不要解释、不要标点、不要语气词、不要多余文本，如果没有主题，请直接返回“闲聊”",
       Summarize:
-        "简要总结一下你和用户的对话，用作后续的上下文提示 prompt，控制在 200 字以内",
+        "简要总结一下对话内容，用作后续的上下文提示 prompt，控制在 200 字以内",
     },
   },
   Copy: {
@@ -173,7 +172,7 @@ const cn = {
     Failed: "复制失败，请赋予剪切板权限",
   },
   Context: {
-    Toast: (x: any) => `已设置 ${x} 条前置上下文`,
+    Toast: (x: any) => `包含 ${x} 条预设提示词`,
     Edit: "当前对话设置",
     Add: "新增预设对话",
   },

app/locales/en.ts

@@ -163,12 +163,11 @@ const en: RequiredLocaleType = {
     Error: "Something went wrong, please try again later.",
     Prompt: {
       History: (content: string) =>
-        "This is a summary of the chat history between the AI and the user as a recap: " +
+        "This is a summary of the chat history as a recap: " + content,
-        content,
       Topic:
         "Please generate a four to five word title summarizing our conversation without any lead-in, punctuation, quotation marks, periods, symbols, or additional text. Remove enclosing quotation marks.",
       Summarize:
-        "Summarize our discussion briefly in 200 words or less to use as a prompt for future context.",
+        "Summarize the discussion briefly in 200 words or less to use as a prompt for future context.",
     },
   },
   Copy: {

app/store/chat.ts

@@ -45,6 +45,7 @@ export interface ChatSession {
   stat: ChatStat;
   lastUpdate: number;
   lastSummarizeIndex: number;
+  clearContextIndex?: number;
 
   mask: Mask;
 }
@@ -341,7 +342,12 @@ export const useChatStore = create<ChatStore>()(
       getMessagesWithMemory() {
         const session = get().currentSession();
         const modelConfig = session.mask.modelConfig;
-        const messages = session.messages.filter((msg) => !msg.isError);
+
+        // wont send cleared context messages
+        const clearedContextMessages = session.messages.slice(
+          (session.clearContextIndex ?? -1) + 1,
+        );
+        const messages = clearedContextMessages.filter((msg) => !msg.isError);
         const n = messages.length;
 
         const context = session.mask.context.slice();
@@ -362,17 +368,17 @@ export const useChatStore = create<ChatStore>()(
           n - modelConfig.historyMessageCount,
         );
         const longTermMemoryMessageIndex = session.lastSummarizeIndex;
-        const oldestIndex = Math.max(
+        const mostRecentIndex = Math.max(
           shortTermMemoryMessageIndex,
           longTermMemoryMessageIndex,
         );
-        const threshold = modelConfig.compressMessageLengthThreshold;
+        const threshold = modelConfig.compressMessageLengthThreshold * 2;
 
         // get recent messages as many as possible
         const reversedRecentMessages = [];
         for (
           let i = n - 1, count = 0;
-          i >= oldestIndex && count < threshold;
+          i >= mostRecentIndex && count < threshold;
           i -= 1
         ) {
           const msg = messages[i];
@@ -410,15 +416,15 @@ export const useChatStore = create<ChatStore>()(
         const session = get().currentSession();
 
         // remove error messages if any
-        const cleanMessages = session.messages.filter((msg) => !msg.isError);
+        const messages = session.messages;
 
         // should summarize topic after chating more than 50 words
         const SUMMARIZE_MIN_LEN = 50;
         if (
           session.topic === DEFAULT_TOPIC &&
-          countMessages(cleanMessages) >= SUMMARIZE_MIN_LEN
+          countMessages(messages) >= SUMMARIZE_MIN_LEN
         ) {
-          const topicMessages = cleanMessages.concat(
+          const topicMessages = messages.concat(
             createMessage({
               role: "user",
               content: Locale.Store.Prompt.Topic,
@@ -440,9 +446,13 @@ export const useChatStore = create<ChatStore>()(
         }
 
         const modelConfig = session.mask.modelConfig;
-        let toBeSummarizedMsgs = cleanMessages.slice(
+        const summarizeIndex = Math.max(
           session.lastSummarizeIndex,
+          session.clearContextIndex ?? 0,
         );
+        let toBeSummarizedMsgs = messages
+          .filter((msg) => !msg.isError)
+          .slice(summarizeIndex);
 
         const historyMsgLength = countMessages(toBeSummarizedMsgs);