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refactor(llm): optimize chat UI updates by checking for new content and preserving scroll position

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perf3ct 2025-06-02 22:34:10 +00:00
parent 7b498cf384
commit 0d305cd22c
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1 changed files with 64 additions and 7 deletions
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59
apps/client/src/widgets/llm_chat/llm_chat_panel.ts
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@ -362,9 +362,44 @@ export default class LlmChatPanel extends BasicWidget {
const savedData = await this.onGetData() as ChatData;
if (savedData?.messages?.length > 0) {
// Check if we actually have new content to avoid unnecessary UI rebuilds
const currentMessageCount = this.messages.length;
const savedMessageCount = savedData.messages.length;
// If message counts are the same, check if content is different
const hasNewContent = savedMessageCount > currentMessageCount ||
JSON.stringify(this.messages) !== JSON.stringify(savedData.messages);
if (!hasNewContent) {
console.log("No new content detected, skipping UI rebuild");
return true;
}
console.log(`Loading saved data: ${currentMessageCount} -> ${savedMessageCount} messages`);
// Store current scroll position if we need to preserve it
const shouldPreserveScroll = savedMessageCount > currentMessageCount && currentMessageCount > 0;
const currentScrollTop = shouldPreserveScroll ? this.chatContainer.scrollTop : 0;
const currentScrollHeight = shouldPreserveScroll ? this.chatContainer.scrollHeight : 0;
// Load messages
const oldMessages = [...this.messages];
this.messages = savedData.messages;
// Only rebuild UI if we have significantly different content
if (savedMessageCount > currentMessageCount) {
// We have new messages - just add the new ones instead of rebuilding everything
const newMessages = savedData.messages.slice(currentMessageCount);
console.log(`Adding ${newMessages.length} new messages to UI`);
newMessages.forEach(message => {
const role = message.role as 'user' | 'assistant';
this.addMessageToChat(role, message.content);
});
} else {
// Content changed but count is same - need to rebuild
console.log("Message content changed, rebuilding UI");
// Clear and rebuild the chat UI
this.noteContextChatMessages.innerHTML = '';
@ -372,6 +407,7 @@ export default class LlmChatPanel extends BasicWidget {
const role = message.role as 'user' | 'assistant';
this.addMessageToChat(role, message.content);
});
}
// Restore tool execution steps if they exist
if (savedData.toolSteps && Array.isArray(savedData.toolSteps) && savedData.toolSteps.length > 0) {
@ -421,6 +457,27 @@ export default class LlmChatPanel extends BasicWidget {
return false;
}
// Restore scroll position if we were preserving it
if (shouldPreserveScroll) {
// Calculate the new scroll position to maintain relative position
const newScrollHeight = this.chatContainer.scrollHeight;
const scrollDifference = newScrollHeight - currentScrollHeight;
const newScrollTop = currentScrollTop + scrollDifference;
// Only scroll down if we're near the bottom, otherwise preserve exact position
const wasNearBottom = (currentScrollTop + this.chatContainer.clientHeight) >= (currentScrollHeight - 50);
if (wasNearBottom) {
// User was at bottom, scroll to new bottom
this.chatContainer.scrollTop = newScrollHeight;
console.log("User was at bottom, scrolling to new bottom");
} else {
// User was not at bottom, try to preserve their position
this.chatContainer.scrollTop = newScrollTop;
console.log(`Preserving scroll position: ${currentScrollTop} -> ${newScrollTop}`);
}
}
return true;
}
} catch (error) {
@ -1105,7 +1162,7 @@ export default class LlmChatPanel extends BasicWidget {
console.error("Failed to save assistant response to note:", err);
});
}
}, 3000); // Wait 3 seconds for server to complete its save
}, 1500); // Wait 1.5 seconds for server to complete its save
}
// Scroll to bottom