Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func AppendSourceMapChunk ¶
func AppendSourceMapChunk(j *Joiner, prevEndState SourceMapState, startState SourceMapState, sourceMap []byte)
Source map chunks are computed in parallel for speed. Each chunk is relative to the zero state instead of being relative to the end state of the previous chunk, since it's impossible to know the end state of the previous chunk in a parallel computation.
After all chunks are computed, they are joined together in a second pass. This rewrites the first mapping in each chunk to be relative to the end state of the previous chunk.
func QuoteForJSON ¶
Types ¶
type Joiner ¶
type Joiner struct {
// contains filtered or unexported fields
}
This provides an efficient way to join lots of big string and byte slices together. It avoids the cost of repeatedly reallocating as the buffer grows by measuring exactly how big the buffer should be and then allocating once. This is a measurable speedup.
type PrintOptions ¶
type PrintOptions struct {
OutputFormat config.Format
RemoveWhitespace bool
MangleSyntax bool
ExtractComments bool
Indent int
ToModuleRef js_ast.Ref
WrapperRefForSource func(uint32) js_ast.Ref
UnsupportedFeatures compat.JSFeature
// This contains the contents of the input file to map back to in the source
// map. If it's nil that means we're not generating source maps.
SourceForSourceMap *logger.Source
// This will be present if the input file had a source map. In that case we
// want to map all the way back to the original input file(s).
InputSourceMap *sourcemap.SourceMap
}
type PrintResult ¶
type PrintResult struct {
JS []byte
// This source map chunk just contains the VLQ-encoded offsets for the "JS"
// field above. It's not a full source map. The bundler will be joining many
// source map chunks together to form the final source map.
SourceMapChunk SourceMapChunk
ExtractedComments map[string]bool
}
func Print ¶
func Print(tree js_ast.AST, symbols js_ast.SymbolMap, r renamer.Renamer, options PrintOptions) PrintResult
func PrintExpr ¶
func PrintExpr(expr js_ast.Expr, symbols js_ast.SymbolMap, r renamer.Renamer, options PrintOptions) PrintResult
type QuotedSource ¶
type SourceMapChunk ¶
type SourceMapChunk struct {
Buffer []byte
// There may be more than one source for this chunk if the file being printed
// has an associated source map. In that case the "source index" values in
// the buffer are 0-based indices into this array. The source index of the
// first mapping will be adjusted when the chunks are joined together. Since
// the source indices are encoded using a delta from the previous source
// index, none of the other source indices need to be modified while joining.
QuotedSources []QuotedSource
// This end state will be used to rewrite the start of the following source
// map chunk so that the delta-encoded VLQ numbers are preserved.
EndState SourceMapState
// There probably isn't a source mapping at the end of the file (nor should
// there be) but if we're appending another source map chunk after this one,
// we'll need to know how many characters were in the last line we generated.
FinalGeneratedColumn int
ShouldIgnore bool
}
type SourceMapState ¶
type SourceMapState struct {
// This isn't stored in the source map. It's only used by the bundler to join
// source map chunks together correctly.
GeneratedLine int
// These are stored in the source map in VLQ format.
GeneratedColumn int
SourceIndex int
OriginalLine int
OriginalColumn int
}
Coordinates in source maps are stored using relative offsets for size reasons. When joining together chunks of a source map that were emitted in parallel for different parts of a file, we need to fix up the first segment of each chunk to be relative to the end of the previous chunk.
Source Files