From 4e7e2e3a8a2cbcda1ac543b4fcd630613a29a221 Mon Sep 17 00:00:00 2001
From: JunjieBai <baijunjie@kylinos.cn>
Date: Fri, 27 Oct 2023 15:06:55 +0800
Subject: [PATCH] fix(app-search-plugin):add a method to get snippet of text
 and use it to wrap description of online application.

---
 libsearch/appsearch/app-search-plugin.cpp |  5 +-
 libsearch/file-utils.cpp                  | 67 +++++++++++++++++++++++
 libsearch/file-utils.h                    |  1 +
 3 files changed, 71 insertions(+), 2 deletions(-)

diff --git a/libsearch/appsearch/app-search-plugin.cpp b/libsearch/appsearch/app-search-plugin.cpp
index b10ba5d..3a0e907 100644
--- a/libsearch/appsearch/app-search-plugin.cpp
+++ b/libsearch/appsearch/app-search-plugin.cpp
@@ -156,7 +156,8 @@ QWidget *AppSearchPlugin::detailPage(const ResultInfo &ri)
         m_actionLabel2->hide();
         m_actionLabel3->hide();
         m_actionLabel4->show();
-        QString showDesc = fontMetrics.elidedText(ri.description.at(0).key + " " + ri.description.at(0).value, Qt::ElideRight, 3114); //当字体长度超过215时显示为省略号
+//        QString showDesc = fontMetrics.elidedText(ri.description.at(0).key + " " + ri.description.at(0).value, Qt::ElideRight, 3114); //当字体长度超过215时显示为省略号
+        QString showDesc = FileUtils::getSnippetWithoutKeyword(ri.description.at(0).key + " " + ri.description.at(0).value, 10);
         m_descLabel->setText(FileUtils::escapeHtml(showDesc));
         m_descFrame->show();
         m_line_2->show();
@@ -235,7 +236,7 @@ void AppSearchPlugin::initDetailPage()
     m_descFrameLyt = new QVBoxLayout(m_descFrame);
     m_descLabel = new QLabel(m_descFrame);
     m_descLabel->setTextFormat(Qt::PlainText);
-    m_descLabel->setWordWrap(true);
+//    m_descLabel->setWordWrap(true);
     m_descFrameLyt->addWidget(m_descLabel);
     m_descFrame->setLayout(m_descFrameLyt);
     m_descFrameLyt->setContentsMargins(8, 0, 0, 0);
diff --git a/libsearch/file-utils.cpp b/libsearch/file-utils.cpp
index 4a9a45b..00f2a2e 100644
--- a/libsearch/file-utils.cpp
+++ b/libsearch/file-utils.cpp
@@ -1366,3 +1366,70 @@ void FileUtils::getOFDTextContent(const QString &path, QString &textContent)
 
     zipfile.close();
 }
+
+QString FileUtils::getSnippetWithoutKeyword(const QString &content, int lineCount) {
+    QString snippet;
+    int numOfLine = 0;
+    QFont font(qApp->font().family());
+    font.setPointSizeF(qApp->font().pointSizeF());
+    QFontMetricsF fontMetricsF(font);
+
+    qreal length = 0;
+    int wordCount = 0;
+    int boundaryStart = 0;
+    int boundaryEnd = 0;
+    QTextBoundaryFinder fm(QTextBoundaryFinder::Grapheme, content);
+
+    for(;fm.position() != -1;fm.toNextBoundary()) {
+        boundaryEnd = fm.position();
+        if (boundaryEnd == boundaryStart) {
+            continue;
+        }
+        if (numOfLine == lineCount) {
+            break;
+        }
+        QString word = content.mid(boundaryStart, boundaryEnd - boundaryStart);
+        wordCount += boundaryEnd - boundaryStart;
+        length = fontMetricsF.horizontalAdvance(content.mid(boundaryStart - wordCount, wordCount));
+
+        if (length >= LABEL_MAX_WIDTH || word == "\n") {
+            if (word == "\n") {
+                boundaryStart = boundaryEnd;
+            } else if (length > LABEL_MAX_WIDTH) {
+                fm.toPreviousBoundary();
+            } else {
+                boundaryStart = boundaryEnd;
+                snippet.append(word);
+            }
+            snippet.append("\n");
+
+            numOfLine++;
+            if (numOfLine == lineCount) {
+                qreal distance = 1;//最后一位必然是\n
+                qreal wordSize = 0;
+                if (!(word == "\n" && length < LABEL_MAX_WIDTH)) {
+                    if (length > LABEL_MAX_WIDTH) {
+                        boundaryEnd = boundaryStart;
+                    }
+                    while (wordSize < fontMetricsF.horizontalAdvance("…")) {
+                        boundaryStart = fm.position();
+
+                        wordSize += fontMetricsF.horizontalAdvance(content.mid(boundaryStart, boundaryEnd - boundaryStart));
+                        distance += (boundaryEnd - boundaryStart);
+                        boundaryEnd = boundaryStart;
+                        fm.toPreviousBoundary();
+                    }
+                }
+                snippet = snippet.left(snippet.size() - distance);
+                snippet.append("…");
+                break;
+            }
+            length = 0;
+            wordCount = 0;
+            continue;
+        }
+        snippet.append(word);
+        boundaryStart = boundaryEnd;
+    }
+    return snippet;
+}
diff --git a/libsearch/file-utils.h b/libsearch/file-utils.h
index fdca51e..49d6460 100644
--- a/libsearch/file-utils.h
+++ b/libsearch/file-utils.h
@@ -62,6 +62,7 @@ public:
     static bool copyPath(QString &path);
     static QString escapeHtml(const QString &str);
     static QString getSnippet(const std::string &myStr, uint start, const QString &keyword);
+    static QString getSnippetWithoutKeyword(const QString &content, int lineCount);
     static bool isOpenXMLFileEncrypted(const QString &path);
     /**
      * @brief isEncrypedOrUnsupport