UiChatMessageItem.hpp

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#pragma once
 
#include "AstGlobal.h"
#include <QWidget>
#include <QLabel>
#include <QTextEdit>
#include <QString>
 
AST_NAMESPACE_BEGIN
 
enum class EChatRole;
 
class AST_UIAI_API UiChatMessageItem : public QWidget
{
    Q_OBJECT
 
public:
    explicit UiChatMessageItem(EChatRole role,
                               const QString& content = QString(),
                               QWidget* parent = nullptr);
 
    ~UiChatMessageItem() override;
    UiChatMessageItem(const UiChatMessageItem&) = delete;
    UiChatMessageItem& operator=(const UiChatMessageItem&) = delete;
 
    void setContent(const QString& content);
 
    void appendHtml(const QString& text);
 
    EChatRole role() const { return role_; }
 
    QString content() const;
 
    static QString roleDisplayName(EChatRole role);
 
protected:
    void paintEvent(QPaintEvent* event) override;
    void resizeEvent(QResizeEvent* event) override;
 
private Q_SLOTS:
    void updateContentHeight();
 
private:
    void setupUi();
    void applyRoleStyle();
 
    EChatRole   role_;
    QLabel*     roleLabel_ = nullptr;     // 角色标签（"你" / "助手"）
    QTextEdit*  contentEdit_ = nullptr;   // 消息内容（支持富文本）
    QString     accumulatedHtml_{};         // 累积的 HTML（用于流式渲染 setHtml）
    int         cachedDocHeight_ = 0;     // 上次计算的文档高度，避免循环
};
 
AST_NAMESPACE_END