715 lines
27 KiB
C++
715 lines
27 KiB
C++
#include "chat_renderer.h"
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#include <KSyntaxHighlighting/Repository>
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#include <KSyntaxHighlighting/Definition>
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#include <KSyntaxHighlighting/Theme>
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#include <KSyntaxHighlighting/AbstractHighlighter>
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#include <KSyntaxHighlighting/State>
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#include <KSyntaxHighlighting/Format>
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#include <QApplication>
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#include <QPalette>
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#include <QTextCursor>
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#include <QScrollBar>
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#include <QRegularExpression>
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// --- HTML Highlighter ---
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class HtmlHighlighter : public KSyntaxHighlighting::AbstractHighlighter
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{
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public:
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QString html;
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using AbstractHighlighter::AbstractHighlighter;
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KSyntaxHighlighting::State processLine(const QString &line, const KSyntaxHighlighting::State &state)
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{
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m_currentLine = line;
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return highlightLine(line, state);
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}
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protected:
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void applyFormat(int offset, int length, const KSyntaxHighlighting::Format &format) override
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{
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QString text = m_currentLine.mid(offset, length).toHtmlEscaped();
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if (format.hasTextColor(theme())) {
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QColor fg = format.textColor(theme());
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html += QStringLiteral("<span style=\"color:") + fg.name() + QStringLiteral("\">") + text + QStringLiteral("</span>");
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} else {
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html += text;
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}
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}
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private:
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QString m_currentLine;
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};
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// --- ChatRenderer ---
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ChatRenderer::ChatRenderer()
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: m_repo(new KSyntaxHighlighting::Repository())
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{
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}
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ChatRenderer::~ChatRenderer()
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{
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delete m_repo;
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}
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void ChatRenderer::detectTheme() const
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{
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m_dark = QApplication::palette().color(QPalette::Window).lightnessF() < 0.5;
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}
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QString ChatRenderer::escapeHtml(const QString &text) const
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{
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return text.toHtmlEscaped();
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}
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// --- Block Parsing ---
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QList<ChatBlock> ChatRenderer::parseBlocks(const QString &text) const
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{
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QList<ChatBlock> blocks;
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if (text.isEmpty()) return blocks;
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static const QRegularExpression headerRe(
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R"(^\[\[\[(user|assistant|reasoning|call|tool|error|info)(?::([^\]]*))?\]\]\](.*)$)",
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QRegularExpression::MultilineOption);
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static const QRegularExpression endRe(
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R"(^\[\[\[end\]\]\]\s*$)",
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QRegularExpression::MultilineOption);
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auto it = headerRe.globalMatch(text);
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QList<QPair<int, QRegularExpressionMatch>> headers;
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while (it.hasNext()) {
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auto match = it.next();
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headers.append({match.capturedStart(), match});
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}
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if (headers.isEmpty()) {
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ChatBlock b;
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b.type = ChatBlock::Assistant;
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b.content = text;
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blocks.append(b);
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return blocks;
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}
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for (int i = 0; i < headers.size(); ++i) {
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const auto &[pos, match] = headers[i];
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QString typeStr = match.captured(1);
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QString name = match.captured(2);
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QString inlineContent = match.captured(3);
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int contentStart = match.capturedEnd();
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// Find the [[[end]]] marker after this header (before next header)
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int searchEnd = (i + 1 < headers.size()) ? headers[i + 1].first : text.size();
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QString segment = text.mid(contentStart, searchEnd - contentStart);
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auto endMatch = endRe.match(segment);
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int contentEnd;
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if (endMatch.hasMatch()) {
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contentEnd = contentStart + endMatch.capturedStart();
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} else {
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// No [[[end]]] found — treat rest until next header as content (streaming)
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contentEnd = searchEnd;
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}
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QString content;
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if (typeStr == "info" && !inlineContent.trimmed().isEmpty()) {
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content = inlineContent.trimmed();
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} else {
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content = text.mid(contentStart, contentEnd - contentStart);
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if (content.startsWith('\n'))
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content = content.mid(1);
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while (content.endsWith("\n\n"))
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content.chop(1);
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}
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ChatBlock b;
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if (typeStr == "user") b.type = ChatBlock::User;
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else if (typeStr == "assistant") b.type = ChatBlock::Assistant;
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else if (typeStr == "reasoning") b.type = ChatBlock::Reasoning;
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else if (typeStr == "call") b.type = ChatBlock::Call;
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else if (typeStr == "tool") b.type = ChatBlock::Tool;
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else if (typeStr == "error") b.type = ChatBlock::Error;
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else if (typeStr == "info") b.type = ChatBlock::Info;
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b.name = name;
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b.content = content;
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blocks.append(b);
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}
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return blocks;
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}
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QList<SubBlock> ChatRenderer::parseSubBlocks(const QString &content) const
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{
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QList<SubBlock> result;
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if (content.isEmpty()) return result;
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static const QRegularExpression interruptRe(
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R"(<system-user-interruption>\n?(.*?)\n?</system-user-interruption>)",
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QRegularExpression::DotMatchesEverythingOption);
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static const QRegularExpression fenceRe(
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R"(^```(\w*)[ \t]*([^\n]*)\n((?:(?!^```).)*?)\n^```\s*$)",
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QRegularExpression::MultilineOption | QRegularExpression::DotMatchesEverythingOption);
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// Find all interrupt tags
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int lastEnd = 0;
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auto intIt = interruptRe.globalMatch(content);
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QList<QPair<int, QRegularExpressionMatch>> interrupts;
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while (intIt.hasNext()) {
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auto match = intIt.next();
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interrupts.append({match.capturedStart(), match});
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}
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// Helper: parse a segment for code fences and prose
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auto parseSegment = [&](const QString &segment) {
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if (segment.trimmed().isEmpty()) return;
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int segLastEnd = 0;
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auto it = fenceRe.globalMatch(segment);
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while (it.hasNext()) {
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auto match = it.next();
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if (match.capturedStart() > segLastEnd) {
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QString prose = segment.mid(segLastEnd, match.capturedStart() - segLastEnd).trimmed();
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if (!prose.isEmpty()) {
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SubBlock sb;
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sb.type = SubBlock::Prose;
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sb.content = prose;
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result.append(sb);
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}
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}
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QString lang = match.captured(1);
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QString meta = match.captured(2).trimmed();
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QString code = match.captured(3);
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SubBlock sb;
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if (lang == "diff" || (lang.isEmpty() &&
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(code.startsWith("--- ") || code.startsWith("diff --git")))) {
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sb.type = SubBlock::Diff;
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} else {
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sb.type = SubBlock::Code;
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}
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sb.language = lang;
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sb.fenceMeta = meta;
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sb.content = code;
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result.append(sb);
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segLastEnd = match.capturedEnd();
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}
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if (segLastEnd < segment.size()) {
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QString prose = segment.mid(segLastEnd).trimmed();
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if (!prose.isEmpty()) {
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SubBlock sb;
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sb.type = SubBlock::Prose;
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sb.content = prose;
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result.append(sb);
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}
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}
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};
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if (interrupts.isEmpty()) {
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parseSegment(content);
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} else {
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for (int i = 0; i < interrupts.size(); ++i) {
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const auto &[pos, match] = interrupts[i];
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if (pos > lastEnd) {
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parseSegment(content.mid(lastEnd, pos - lastEnd));
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}
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SubBlock sb;
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sb.type = SubBlock::Interrupt;
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sb.content = match.captured(1).trimmed();
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result.append(sb);
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lastEnd = match.capturedEnd();
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}
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if (lastEnd < content.size()) {
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parseSegment(content.mid(lastEnd));
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}
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}
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if (result.isEmpty()) {
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SubBlock sb;
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sb.type = SubBlock::Prose;
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sb.content = content;
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result.append(sb);
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}
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return result;
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}
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// --- HTML Rendering ---
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QString ChatRenderer::highlightCode(const QString &code, const QString &language) const
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{
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auto def = m_repo->definitionForName(language);
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if (!def.isValid())
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def = m_repo->definitionForFileName("file." + language);
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if (!def.isValid())
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return QStringLiteral("<pre style=\"margin:4px 0;white-space:pre-wrap;\">") + escapeHtml(code) + QStringLiteral("</pre>");
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auto theme = m_dark
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? m_repo->defaultTheme(KSyntaxHighlighting::Repository::DarkTheme)
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: m_repo->defaultTheme(KSyntaxHighlighting::Repository::LightTheme);
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HtmlHighlighter builder;
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builder.setDefinition(def);
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builder.setTheme(theme);
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KSyntaxHighlighting::State state;
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const QStringList lines = code.split('\n');
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for (int i = 0; i < lines.size(); ++i) {
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state = builder.processLine(lines[i], state);
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if (i < lines.size() - 1)
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builder.html += '\n';
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}
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return QStringLiteral("<pre style=\"margin:4px 0;white-space:pre-wrap;\">") + builder.html + QStringLiteral("</pre>");
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}
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QString ChatRenderer::renderDiff(const QString &diff) const
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{
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QString html = QStringLiteral("<pre style=\"margin:4px 0;white-space:pre-wrap;\">");
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const QStringList lines = diff.split('\n');
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for (const QString &line : lines) {
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if (line.startsWith('+')) {
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html += QStringLiteral("<span style=\"color:#4caf50;\">") + escapeHtml(line) + QStringLiteral("</span>\n");
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} else if (line.startsWith('-')) {
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html += QStringLiteral("<span style=\"color:#f44336;\">") + escapeHtml(line) + QStringLiteral("</span>\n");
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} else if (line.startsWith("@@")) {
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html += QStringLiteral("<span style=\"color:#2196f3;\">") + escapeHtml(line) + QStringLiteral("</span>\n");
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} else {
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html += escapeHtml(line) + '\n';
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}
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}
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html += QStringLiteral("</pre>");
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return html;
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}
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QString ChatRenderer::renderProse(const QString &prose) const
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{
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// Simple markdown-ish rendering: bold, italic, inline code, links
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QString html = escapeHtml(prose);
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// Inline code: `code`
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static const QRegularExpression inlineCode("`([^`]+)`");
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html.replace(inlineCode, QStringLiteral("<code style=\"background:") +
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(m_dark ? QStringLiteral("#333") : QStringLiteral("#f0f0f0")) +
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QStringLiteral(";padding:1px 4px;border-radius:3px;\">\\1</code>"));
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// Bold: **text** or __text__
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static const QRegularExpression bold(R"(\*\*(.+?)\*\*)");
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html.replace(bold, QStringLiteral("<b>\\1</b>"));
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static const QRegularExpression bold2(R"(__(.+?)__)");
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html.replace(bold2, QStringLiteral("<b>\\1</b>"));
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// Italic: *text* or _text_
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static const QRegularExpression italic(R"((?<!\*)\*(?!\*)(.+?)(?<!\*)\*(?!\*))");
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html.replace(italic, QStringLiteral("<i>\\1</i>"));
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// Bullet points: lines starting with - or *
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static const QRegularExpression bullet(R"(^(\s*)[\-\*]\s)", QRegularExpression::MultilineOption);
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html.replace(bullet, QStringLiteral("\\1• "));
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// Newlines to <br>
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html.replace('\n', QStringLiteral("<br>"));
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return html;
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}
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QString ChatRenderer::subBlockToHtml(const SubBlock &sub, bool preserveWhitespace) const
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{
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QString codeBg = m_dark ? QStringLiteral("#1e1e2e") : QStringLiteral("#f5f5f5");
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QString codeBorder = m_dark ? QStringLiteral("#444") : QStringLiteral("#ddd");
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switch (sub.type) {
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case SubBlock::Code: {
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QString langLabel;
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if (!sub.language.isEmpty()) {
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langLabel = QStringLiteral(
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"<div style=\"font-size:small;color:gray;padding:2px 8px;\">") +
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escapeHtml(sub.language) + QStringLiteral("</div>");
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}
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return QStringLiteral(
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"<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin:6px 0;\">"
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"<tr><td style=\"background:") + codeBg +
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QStringLiteral(";border:1px solid ") + codeBorder +
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QStringLiteral(";padding:8px;\">") +
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langLabel + highlightCode(sub.content, sub.language) +
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QStringLiteral("</td></tr></table>");
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}
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case SubBlock::Diff: {
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// Store diff and render a clickable link to open in Kate's diff viewer
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if (m_diffStorage) {
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int idx = m_diffStorage->size();
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m_diffStorage->append(sub.content);
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// Count lines for display
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int adds = 0, dels = 0;
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const QStringList lines = sub.content.split('\n');
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for (const QString &line : lines) {
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if (line.startsWith('+') && !line.startsWith("+++")) adds++;
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else if (line.startsWith('-') && !line.startsWith("---")) dels++;
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}
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QString stats;
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if (adds > 0) stats += QStringLiteral("<span style=\"color:#4caf50;\">+%1</span> ").arg(adds);
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if (dels > 0) stats += QStringLiteral("<span style=\"color:#f44336;\">-%1</span>").arg(dels);
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return QStringLiteral(
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"<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin:6px 0;\">"
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"<tr><td style=\"background:") + codeBg +
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QStringLiteral(";border:1px solid ") + codeBorder +
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QStringLiteral(";padding:8px 12px;\">"
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"<span style=\"font-size:small;color:gray;\">▶ diff</span> ") +
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stats +
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QStringLiteral("<br><a href=\"ollie-diff:///") + QString::number(idx) +
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QStringLiteral("\" style=\"color:#2196f3;text-decoration:underline;\">"
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"↗ Open in Diff Viewer</a>"
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"</td></tr></table>");
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}
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// Fallback: render inline
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return QStringLiteral(
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"<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin:6px 0;\">"
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"<tr><td style=\"background:") + codeBg +
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QStringLiteral(";border:1px solid ") + codeBorder +
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QStringLiteral(";padding:8px;\">"
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"<div style=\"font-size:small;color:gray;padding:2px 8px;\">diff</div>") +
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renderDiff(sub.content) +
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QStringLiteral("</td></tr></table>");
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}
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case SubBlock::Prose:
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if (preserveWhitespace) {
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return QStringLiteral("<pre style=\"margin:4px 0;white-space:pre-wrap;font-family:monospace;font-size:small;\">") +
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escapeHtml(sub.content) + QStringLiteral("</pre>");
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}
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return QStringLiteral("<div style=\"margin:4px 0;line-height:1.4;\">") +
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renderProse(sub.content) + QStringLiteral("</div>");
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case SubBlock::Interrupt: {
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QString interruptBg = m_dark ? QStringLiteral("#3d2e00") : QStringLiteral("#fff8e1");
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QString interruptBorder = QStringLiteral("#ffc107");
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return QStringLiteral(
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"<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin:8px 0;\">"
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"<tr><td style=\"background:") + interruptBg +
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QStringLiteral(";padding:8px 12px;border-left:3px solid ") + interruptBorder +
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QStringLiteral(";\">"
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"<div style=\"font-size:small;color:") + interruptBorder +
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QStringLiteral(";font-weight:bold;\">⚠ user interrupt</div>"
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"<div style=\"margin:4px 0;line-height:1.4;\">") +
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renderProse(sub.content) +
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QStringLiteral("</div></td></tr></table>");
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}
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}
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return {};
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}
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QString ChatRenderer::blockToHtml(const ChatBlock &block) const
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{
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detectTheme();
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QString userBg = m_dark ? QStringLiteral("#1a3a5c") : QStringLiteral("#e3f2fd");
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QString assistantBg = m_dark ? QStringLiteral("#2a2a2a") : QStringLiteral("#fafafa");
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QString errorBg = m_dark ? QStringLiteral("#3d1515") : QStringLiteral("#ffebee");
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QString metaBg = m_dark ? QStringLiteral("#1a1a2e") : QStringLiteral("#f5f5f5");
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QString metaColor = m_dark ? QStringLiteral("#888") : QStringLiteral("#666");
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QString borderColor = m_dark ? QStringLiteral("#444") : QStringLiteral("#e0e0e0");
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switch (block.type) {
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case ChatBlock::User: {
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QList<SubBlock> subs = parseSubBlocks(block.content);
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QString inner;
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for (const auto &sub : subs)
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inner += subBlockToHtml(sub);
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return QStringLiteral(
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"<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin:8px 0;\">"
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"<tr><td width=\"15%\"></td>"
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"<td style=\"background:") + userBg +
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QStringLiteral(";padding:10px 14px;border:1px solid ") + borderColor +
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QStringLiteral(";\">") + inner +
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QStringLiteral("</td></tr>"
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"<tr><td></td><td align=\"right\"><span style=\"font-size:small;color:gray;\">You</span></td></tr>"
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"</table>");
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}
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case ChatBlock::Assistant: {
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QList<SubBlock> subs = parseSubBlocks(block.content);
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QString inner;
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QString lastProse; // track preceding prose for file path extraction
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QString lastFilePath; // carry forward across code blocks
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for (const auto &sub : subs) {
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if (sub.type == SubBlock::Prose) {
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lastProse = sub.content;
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}
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inner += subBlockToHtml(sub);
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// Add "Apply" button for code blocks in assistant messages
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if (sub.type == SubBlock::Code && m_applyStorage && !sub.content.trimmed().isEmpty()) {
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// Parse fence metadata for /path:startLine-endLine
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static const QRegularExpression fenceMetaRe(
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R"((/[^\s:]+)(?::(\d+)(?:-(\d+))?)?)");
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QString filePath;
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int startLine = -1, endLine = -1;
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auto metaMatch = fenceMetaRe.match(sub.fenceMeta);
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if (metaMatch.hasMatch()) {
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filePath = metaMatch.captured(1);
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lastFilePath = filePath;
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if (!metaMatch.captured(2).isEmpty())
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startLine = metaMatch.captured(2).toInt();
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if (!metaMatch.captured(3).isEmpty())
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endLine = metaMatch.captured(3).toInt();
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else if (startLine > 0)
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endLine = startLine; // single line
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} else {
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// Fall back to extracting path from preceding prose
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static const QRegularExpression filePathRe(
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R"((?:`|\b)(/[^\s:`]+\.\w+)(?:`|\b))");
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auto proseMatch = filePathRe.match(lastProse);
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if (proseMatch.hasMatch()) {
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filePath = proseMatch.captured(1);
|
|
lastFilePath = filePath;
|
|
} else {
|
|
filePath = lastFilePath;
|
|
}
|
|
}
|
|
|
|
int idx = m_applyStorage->size();
|
|
ApplyBlock ab;
|
|
ab.filePath = filePath;
|
|
ab.code = sub.content;
|
|
ab.startLine = startLine;
|
|
ab.endLine = endLine;
|
|
m_applyStorage->append(ab);
|
|
|
|
QString rangeStr;
|
|
if (startLine > 0 && endLine > 0) {
|
|
rangeStr = QStringLiteral(":%1-%2").arg(startLine).arg(endLine);
|
|
}
|
|
QString applyLabel = filePath.isEmpty()
|
|
? QStringLiteral("✎ Apply")
|
|
: QStringLiteral("✎ Apply to ") + escapeHtml(filePath.section('/', -1)) + rangeStr;
|
|
inner += QStringLiteral(
|
|
"<div style=\"margin:-4px 0 6px 0;\">"
|
|
"<a href=\"ollie-apply:///") + QString::number(idx) +
|
|
QStringLiteral("\" style=\"color:#4caf50;text-decoration:none;"
|
|
"font-size:small;padding:2px 8px;"
|
|
"border:1px solid #4caf50;border-radius:3px;\">") +
|
|
applyLabel + QStringLiteral("</a></div>");
|
|
}
|
|
}
|
|
|
|
return QStringLiteral(
|
|
"<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin:8px 0;\">"
|
|
"<tr><td style=\"background:") + assistantBg +
|
|
QStringLiteral(";padding:10px 14px;border:1px solid ") + borderColor +
|
|
QStringLiteral(";\">") + inner +
|
|
QStringLiteral("</td><td width=\"5%\"></td></tr>"
|
|
"<tr><td><span style=\"font-size:small;color:gray;\">Ollie</span></td><td></td></tr>"
|
|
"</table>");
|
|
}
|
|
case ChatBlock::Reasoning: {
|
|
// Show abbreviated with dimmed styling
|
|
QString abbreviated = block.content.left(200);
|
|
if (block.content.size() > 200)
|
|
abbreviated += QStringLiteral("...");
|
|
|
|
return QStringLiteral(
|
|
"<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin:4px 0;\">"
|
|
"<tr><td style=\"background:") + metaBg +
|
|
QStringLiteral(";padding:6px 10px;border-left:3px solid ") + metaColor +
|
|
QStringLiteral(";\">"
|
|
"<div style=\"font-size:small;color:") + metaColor +
|
|
QStringLiteral(";\">▸ reasoning</div>"
|
|
"<pre style=\"margin:4px 0;white-space:pre-wrap;color:") + metaColor +
|
|
QStringLiteral(";font-size:small;\">") + escapeHtml(abbreviated) +
|
|
QStringLiteral("</pre></td></tr></table>");
|
|
}
|
|
case ChatBlock::Call: {
|
|
QString label = QStringLiteral("⚡ call");
|
|
if (!block.name.isEmpty())
|
|
label += QStringLiteral(": ") + escapeHtml(block.name);
|
|
|
|
// Render full call args with sub-block parsing (preserve whitespace)
|
|
QList<SubBlock> subs = parseSubBlocks(block.content);
|
|
QString inner;
|
|
for (const auto &sub : subs)
|
|
inner += subBlockToHtml(sub, true);
|
|
|
|
return QStringLiteral(
|
|
"<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin:4px 0;\">"
|
|
"<tr><td style=\"background:") + metaBg +
|
|
QStringLiteral(";padding:6px 10px;border-left:3px solid #ff9800;\">"
|
|
"<div style=\"font-size:small;color:#ff9800;\">") + label +
|
|
QStringLiteral("</div>") + inner +
|
|
QStringLiteral("</td></tr></table>");
|
|
}
|
|
case ChatBlock::Tool: {
|
|
QString label = QStringLiteral("◆ tool");
|
|
if (!block.name.isEmpty())
|
|
label += QStringLiteral(": ") + escapeHtml(block.name);
|
|
|
|
// Render full tool output with sub-block parsing (preserve whitespace)
|
|
QList<SubBlock> subs = parseSubBlocks(block.content);
|
|
QString inner;
|
|
for (const auto &sub : subs)
|
|
inner += subBlockToHtml(sub, true);
|
|
|
|
return QStringLiteral(
|
|
"<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin:4px 0;\">"
|
|
"<tr><td style=\"background:") + metaBg +
|
|
QStringLiteral(";padding:6px 10px;border-left:3px solid ") + metaColor +
|
|
QStringLiteral(";\">"
|
|
"<div style=\"font-size:small;color:") + metaColor +
|
|
QStringLiteral(";\">") + label +
|
|
QStringLiteral("</div>") + inner +
|
|
QStringLiteral("</td></tr></table>");
|
|
}
|
|
case ChatBlock::Error: {
|
|
return QStringLiteral(
|
|
"<table width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin:6px 0;\">"
|
|
"<tr><td style=\"background:") + errorBg +
|
|
QStringLiteral(";padding:8px 12px;border-left:3px solid #e53935;\">"
|
|
"<pre style=\"margin:0;white-space:pre-wrap;color:#e53935;\">") +
|
|
escapeHtml(block.content) +
|
|
QStringLiteral("</pre></td></tr></table>");
|
|
}
|
|
case ChatBlock::Info: {
|
|
return QStringLiteral(
|
|
"<div style=\"margin:4px 0;font-style:italic;color:") + metaColor +
|
|
QStringLiteral(";font-size:small;\">") +
|
|
escapeHtml(block.content) + QStringLiteral("</div>");
|
|
}
|
|
}
|
|
return {};
|
|
}
|
|
|
|
// --- Full Render ---
|
|
|
|
void ChatRenderer::render(QTextEdit *view, const QString &rawText)
|
|
{
|
|
detectTheme();
|
|
|
|
// Clear storage before re-render (blocks get re-indexed)
|
|
if (m_diffStorage)
|
|
m_diffStorage->clear();
|
|
if (m_applyStorage)
|
|
m_applyStorage->clear();
|
|
|
|
m_allBlocks = parseBlocks(rawText);
|
|
|
|
// Only render the tail window
|
|
m_renderStart = qMax(0, m_allBlocks.size() - m_windowSize);
|
|
|
|
QString html = QStringLiteral(
|
|
"<html><body style=\"font-family:sans-serif;font-size:medium;\">");
|
|
|
|
// Indicate truncation if there are older blocks
|
|
if (m_renderStart > 0) {
|
|
html += QStringLiteral(
|
|
"<div id=\"ollie-load-more\" style=\"text-align:center;padding:8px;"
|
|
"color:gray;font-size:small;font-style:italic;\">↑ "
|
|
"Scroll up to load earlier messages (%1 more) ↑</div>")
|
|
.arg(m_renderStart);
|
|
}
|
|
|
|
for (int i = m_renderStart; i < m_allBlocks.size(); ++i)
|
|
html += blockToHtml(m_allBlocks[i]);
|
|
html += QStringLiteral("</body></html>");
|
|
|
|
auto *sb = view->verticalScrollBar();
|
|
bool atBottom = (sb->maximum() <= 0) || (sb->value() >= sb->maximum() - 4);
|
|
int savedPos = sb->value();
|
|
|
|
// Block signals to prevent intermediate scroll events during setHtml
|
|
sb->blockSignals(true);
|
|
view->setHtml(html);
|
|
|
|
if (atBottom) {
|
|
// Move cursor to end and ensure visible — this forces layout and
|
|
// scrolls reliably, unlike sb->setValue(sb->maximum()) which can
|
|
// read a stale maximum before relayout completes.
|
|
QTextCursor cursor = view->textCursor();
|
|
cursor.movePosition(QTextCursor::End);
|
|
view->setTextCursor(cursor);
|
|
view->ensureCursorVisible();
|
|
} else {
|
|
// Restore exact scroll position — clamp to new maximum
|
|
sb->setValue(qMin(savedPos, sb->maximum()));
|
|
}
|
|
sb->blockSignals(false);
|
|
|
|
m_lastRawText = rawText;
|
|
m_lastBlockCount = m_allBlocks.size();
|
|
}
|
|
|
|
bool ChatRenderer::renderIncremental(QTextEdit *view, const QString &rawText)
|
|
{
|
|
// If text is just appended, try incremental
|
|
if (!rawText.startsWith(m_lastRawText) || m_lastRawText.isEmpty()) {
|
|
render(view, rawText);
|
|
return false;
|
|
}
|
|
|
|
// Full re-render (the HTML approach doesn't support true incremental well
|
|
// since setHtml replaces everything). For performance with typical chat
|
|
// sizes this is fine — QTextEdit handles it efficiently.
|
|
render(view, rawText);
|
|
return true;
|
|
}
|
|
|
|
int ChatRenderer::prependOlder(QTextEdit *view, int count)
|
|
{
|
|
if (m_renderStart <= 0)
|
|
return 0;
|
|
|
|
detectTheme();
|
|
|
|
int loadFrom = qMax(0, m_renderStart - count);
|
|
int loaded = m_renderStart - loadFrom;
|
|
if (loaded <= 0)
|
|
return 0;
|
|
|
|
m_renderStart = loadFrom;
|
|
|
|
// Re-render all currently-visible blocks (now including the older ones)
|
|
auto *sb = view->verticalScrollBar();
|
|
int oldMax = sb->maximum();
|
|
int oldVal = sb->value();
|
|
|
|
sb->blockSignals(true);
|
|
|
|
QString html = QStringLiteral(
|
|
"<html><body style=\"font-family:sans-serif;font-size:medium;\">");
|
|
if (m_renderStart > 0) {
|
|
html += QStringLiteral(
|
|
"<div id=\"ollie-load-more\" style=\"text-align:center;padding:8px;"
|
|
"color:gray;font-size:small;font-style:italic;\">↑ "
|
|
"Scroll up to load earlier messages (%1 more) ↑</div>")
|
|
.arg(m_renderStart);
|
|
}
|
|
for (int i = m_renderStart; i < m_allBlocks.size(); ++i)
|
|
html += blockToHtml(m_allBlocks[i]);
|
|
html += QStringLiteral("</body></html>");
|
|
|
|
view->setHtml(html);
|
|
|
|
// Restore scroll position offset by the added content height
|
|
int newMax = sb->maximum();
|
|
int addedHeight = newMax - oldMax;
|
|
sb->setValue(oldVal + addedHeight);
|
|
|
|
sb->blockSignals(false);
|
|
|
|
return loaded;
|
|
}
|