From 55a5ccc559b34b8d2eb9c7b7a2d9efbae40619c2 Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Tue, 23 Feb 2021 12:36:46 -0500
Subject: Documentation markup extraction (#1724)

* #include an absolute path didn't work - because paths were taken to always be relative.

* WIP extracting source documentation.

* WIP doc extraction.

* More stuff around doc markup extraction.

* More WIP around doc extraction.

* Fix some indexing issues.

* Initial doc extraction working.

* Renaming of types in markup extraction process.

* Extracting markup content.
Removing indenting.
Other fixes and improvements around document tools.

* WIP support for documentation system.

* Remove some commented out sections.

* Remove some comments that no longer apply.

* Improvements around SourceFile - such that more granularity around line ops.
Made some functionality explicitly work without source.
Improved Doc types nameing.
---
 source/slang/slang-source-loc.h | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'source/slang/slang-source-loc.h')

diff --git a/source/slang/slang-source-loc.h b/source/slang/slang-source-loc.h
index ef8b49c3b..54811918f 100644
--- a/source/slang/slang-source-loc.h
+++ b/source/slang/slang-source-loc.h
@@ -139,6 +139,9 @@ struct SourceRange
         /// Get the offset of a loc in this range
     int getOffset(SourceLoc loc) const { SLANG_ASSERT(contains(loc)); return int(loc.getRaw() - begin.getRaw()); }
 
+        /// Convert an offset to a loc
+    SourceLoc getSourceLocFromOffset(uint32_t offset) const { SLANG_ASSERT(offset <= getSize()); return begin + Int(offset); }
+
     SourceRange()
     {}
 
@@ -156,6 +159,7 @@ struct SourceRange
     SourceLoc end;
 };
 
+
 // Pre-declare
 struct SourceManager;
 
@@ -165,10 +169,45 @@ class SourceFile
 {
 public:
 
+    struct OffsetRange
+    {
+            /// We need a value to indicate an invalid range. We can't use 0 as that is valid for an offset range
+            /// We can't use a negative number, and don't want to make signed so we get the full 32-bits.
+            /// So we just use the max value as invalid
+        static const uint32_t kInvalid = 0xffffffff;
+
+            /// True if the range is valid
+        SLANG_FORCE_INLINE bool isValid() const { return end >= start && start != kInvalid; }
+            /// True if offset is within range (inclusively)
+        SLANG_FORCE_INLINE bool containsInclusive(uint32_t offset) const { return offset >= start && offset <= end; }
+
+            /// Get the count
+        SLANG_FORCE_INLINE uint32_t getCount() const { return end - start; }
+
+            /// Return an invalid range. 
+        static OffsetRange makeInvalid() { return OffsetRange{ kInvalid, kInvalid }; }
+
+        uint32_t start;
+        uint32_t end;
+    };
+
         /// Returns the line break offsets (in bytes from start of content)
         /// Note that this is lazily evaluated - the line breaks are only calculated on the first request 
     const List<uint32_t>& getLineBreakOffsets();
 
+        /// Returns true if the offset is on the specified line
+        /// NOTE! If offsets are not fully setup (because we don't have source), will only be correct for lines that have offsets
+    bool isOffsetOnLine(uint32_t offset, Index lineIndex);
+
+        /// Get the line containing the offset. Requires that content is available, else will return an empty slice. 
+    UnownedStringSlice getLineContainingOffset(uint32_t offset);
+
+        /// Get the line at the specified line index. Requires that content is available, else will return an empty slice. 
+    UnownedStringSlice getLineAtIndex(Index lineIndex);
+
+        /// Get the offset range at the specified line index. Works without content.
+    OffsetRange getOffsetRangeAtLineIndex(Index lineIndex);
+
         /// Set the line break offsets
     void setLineBreakOffsets(const uint32_t* offsets, UInt numOffsets);
 
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