From d6fa17cdd94511317982ed254fcb8b7ea4f319b3 Mon Sep 17 00:00:00 2001
From: Roy Qu <royqh1979@gmail.com>
Date: Thu, 22 Feb 2024 14:24:29 +0800
Subject: [PATCH] work save

---
 libs/qsynedit/qsynedit/document.cpp | 47 ++++++++++++++++++------
 libs/qsynedit/qsynedit/document.h   | 57 ++++++++++++++++++++++++++---
 2 files changed, 87 insertions(+), 17 deletions(-)

diff --git a/libs/qsynedit/qsynedit/document.cpp b/libs/qsynedit/qsynedit/document.cpp
index e69f2220..6a4da3ff 100644
--- a/libs/qsynedit/qsynedit/document.cpp
+++ b/libs/qsynedit/qsynedit/document.cpp
@@ -833,7 +833,8 @@ QList<int> calcGlyphPositions(const QString &text)
         if (ch.isHighSurrogate() && i+1<text.length() && QChar::isLowSurrogate(text[i+1].unicode())) {
             //character that larger than 0xffff
             glyphPositions.append(i);
-            i++;
+            i+=2;
+            continue;
         } else if (ch.combiningClass()!=0 && !glyphPositions.isEmpty()) {
             //a Combining character
         } else {
@@ -849,11 +850,19 @@ int Document::stringColumns(const QString &str, int colsBefore) const
     QList<int> glyphPositions = calcGlyphPositions(str);
     int totalColumns;
     calcGlyphColumns(str,glyphPositions,colsBefore, totalColumns);
-    return totalColumns;
+    return totalColumns - colsBefore;
+}
+
+int Document::charToColumn(int line, int charPos)
+{
+    QMutexLocker locker(&mMutex);
+    QList<int> glyphPositions = mLines[line]->glyphPositions();
+
 }
 
 int Document::charToColumn(const QString &lineText, int charPos) const
 {
+    QMutexLocker locker(&mMutex);
     QList<int> glyphPositions = calcGlyphPositions(lineText);
     return charToColumn(lineText, glyphPositions, charPos);
 }
@@ -984,19 +993,33 @@ DocumentLine::DocumentLine():
 {
 }
 
-QStringRef DocumentLine::getGlyph(int i) const
+int DocumentLine::glyphEnd(int i) const
 {
-    Q_ASSERT(i>=0 && i<mGlyphPositions.length());
-    int start = mGlyphPositions[i];
-    int end;
-    if (i+1<mGlyphPositions.length()) {
-        end = mGlyphPositions[i+1];
-    } else {
-        end = mLineText.length();
-    }
-    return mLineText.midRef(start,end-start);
+   Q_ASSERT(i>=0 && i<mGlyphPositions.length());
+   if (i+1<mGlyphPositions.length()) {
+       end = mGlyphPositions[i+1];
+   } else {
+       end = mLineText.length();
+   }
 }
 
+QString DocumentLine::getGlyph(int i) const
+{
+    int start = glyphStart(i);
+    int end = glyphEnd(i);
+    return mLineText.mid(start,end-start);
+}
+
+int DocumentLine::getGlyphEndColumn(int i) const
+{
+    Q_ASSERT(mColumns>=0);
+    Q_ASSERT(i>=0 && i<mGlyphColumns.length());
+    if (i+1<mGlyphColumns.length()) {
+        end = mGlyphColumns[i+1];
+    } else {
+        end = mColumns;
+    }
+}
 
 void DocumentLine::setLineText(const QString &newLineText)
 {
diff --git a/libs/qsynedit/qsynedit/document.h b/libs/qsynedit/qsynedit/document.h
index e566ee6d..b8fa208c 100644
--- a/libs/qsynedit/qsynedit/document.h
+++ b/libs/qsynedit/qsynedit/document.h
@@ -81,12 +81,48 @@ private:
     const QList<int>& glyphColumns() const {
         return mGlyphColumns;
     }
+
+    /**
+     * @brief get start index of the chars representing the specified glyph.
+     * @param i index of the glyph of the line (starting from 0)
+     * @return
+     */
+    int glyphStart(int i) const {
+        Q_ASSERT(i>=0 && i<mGlyphPositions.length());
+        return mGlyphPositions[i];
+    }
+
+    /**
+     * @brief get end index of the chars representing the specified glyph.
+     * @param i index of the glyph of the line (starting from 0)
+     * @return
+     */
+    int glyphEnd(int i) const;
+
     /**
      * @brief get the chars representing the specified glyph.
      * @param i index of the glyph of the line (starting from 0)
      * @return the chars representing the specified glyph
      */
-    QStringRef getGlyph(int i) const;
+    QString getGlyph(int i) const;
+
+    /**
+     * @brief get start column of the specified glyph.
+     * @param i index of the glyph of the line (starting from 0)
+     * @return
+     */
+    int getGlyphStartColumn(int i) const {
+        Q_ASSERT(mColumns>=0);
+        Q_ASSERT(i>=0 && i<mGlyphColumns.length());
+        return mGlyphColumns[i];
+    }
+
+    /**
+     * @brief get end column of the specified glyph.
+     * @param i index of the glyph of the line (starting from 0)
+     * @return
+     */
+    int getGlyphEndColumn(int i) const;
 
     /**
      * @brief get the line text
@@ -390,16 +426,27 @@ public:
     void loadFromFile(const QString& filename, const QByteArray& encoding, QByteArray& realEncoding);
     void saveToFile(QFile& file, const QByteArray& encoding,
                     const QByteArray& defaultEncoding, QByteArray& realEncoding);
+
+    /**
+     * @brief calculate display width (in columns) of a string
+     *
+     * The string may contains tab char, whose width depends on the tab size and it's position
+     *
+     * @param str the string to be displayed
+     * @param colsBefore columns before the string
+     * @return width of the string, don't including colsBefore
+     */
     int stringColumns(const QString &str, int colsBefore) const;
+    int glyphStart(int line, int glyphIdx);
+    int glyphEnd(int line, int glyphIdx);
+    int glyphStartColumn(int line, int glyphIdx);
+    int glyphEndColumn(int line, int glyphIdx);
+    int charToGlyphIndex(int line, int charPos);
 
     int charToColumn(int line, int charPos);
     int columnToChar(int line, int column);
     int charToColumn(int line, const QString newStr, int charPos);
     int columnToChar(int line, const QString newStr, int column);
-    int glyphStart(int line, int glyphIdx);
-    int glyphEnd(int line, int glyphIdx);
-    int glyphColumns(int line, int glyphIdx);
-    int charToGlyphIndex(int line, int charPos);
     int columnToGlyphIndex(int line, int column);