Documentation
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Overview ¶
The render package defines interfaces and functions to stylize a View's contents with colours, fonts and other metadata.
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type ColourScheme ¶
type ColourScheme interface {
// Takes a ViewRegions pointer as input and uses the data contained in it
// to determine the Flavour it should be rendered with.
Spice(*ViewRegions) Flavour
}
type Flavour ¶
type Flavour struct {
Background Colour
Foreground Colour
Font Font
Flags ViewRegionFlags
}
The Flavour struct contains the specific settings used to style a particular Region.
type FontMeasurement ¶
type FontMeasurement struct {
Width, Height int
}
type FontMetrics ¶
type FontMetrics interface {
Measure(Font, []rune) FontMeasurement
}
type Recipe ¶
The Recipe type groups text.RegionSets by their Flavour. The idea is to allow large groups of text be rendered as a single batch without any state changes inbetween the batches.
func Transform ¶
func Transform(scheme ColourScheme, data ViewRegionMap, viewport text.Region) Recipe
Transform takes a ColourScheme, a ViewRegionMap and a viewport as input.
The viewport would be the text.Region of the current buffer that is visible to the user and any ViewRegions outside of this area are not forwarded for further processing.
The remaining ViewRegions are then passed on to the ColourScheme for determining the exact Flavour for which that RegionSet should be styled, adding Regions of the same Flavour to the same RegionSet.
Typically there are more ViewRegions available in a text buffer than there are unique Flavours in a ColourScheme, so this operation can be viewed as reducing the number of state changes required to display the text to the user.
The final output, the Recipe, contains a mapping of all unique Flavours and that Flavour's associated RegionSet.
func (Recipe) Transcribe ¶
func (r Recipe) Transcribe() (ret TranscribedRecipe)
Transcribing the Recipe creates a linear step-by-step representation of it, which might or might not make it easier for Renderers to work with.
type RenderUnit ¶
A RenderUnit is just a Flavour and an associated Region.
type TranscribedRecipe ¶
type TranscribedRecipe []RenderUnit
A TranscribedRecipe is a linear (in text.Regions) representation of a Recipe
func (*TranscribedRecipe) Len ¶
func (r *TranscribedRecipe) Len() int
Just used to satisfy the sort.Interface interface, typically not used otherwise.
func (*TranscribedRecipe) Less ¶
func (r *TranscribedRecipe) Less(i, j int) bool
Just used to satisfy the sort.Interface interface, typically not used otherwise.
func (*TranscribedRecipe) Swap ¶
func (r *TranscribedRecipe) Swap(i, j int)
Just used to satisfy the sort.Interface interface, typically not used otherwise.
type ViewRegionFlags ¶
type ViewRegionFlags int
Flags used to hint at how the region should be rendered.
const ( DRAW_EMPTY ViewRegionFlags = (1 << iota) // Draw a vertical line for an empty (zero area) region HIDE_ON_MINIMAP // Don't draw this region in the minimap DRAW_EMPTY_AS_OVERWRITE // Rather than a vertical line, draw empty regions as a horizontal one DRAW_NO_FILL // Don't draw the filling of the region DRAW_NO_OUTLINE // Don't draw the outline of the region DRAW_SOLID_UNDERLINE // Draw a solid underline under the whole region DRAW_STIPPLED_UNDERLINE // Draw a stippled underline under the whole region DRAW_SQUIGGLY_UNDERLINE // Draw a squiggly underline under the whole region PERSISTENT // Region is saved with the session HIDDEN // Region is not rendered SELECTION // This Region is part of selected text HIGHLIGHT // This Region is part of highlighted text DRAW_TEXT // The actual text contained in the region should be rendered DEFAULT ViewRegionFlags = 0 // No flags at all, only draw the region itself and not the text )
type ViewRegionMap ¶
type ViewRegionMap map[string]ViewRegions
A set of ViewRegions associated by a string identifier key. The name of the key itself has no special meaning other than for being able set, retrieve and update *your* set of ViewRegions.
func (*ViewRegionMap) Cull ¶
func (vrm *ViewRegionMap) Cull(viewport text.Region)
Calls Cull on each ViewRegions object contained in the map, removing all entries that are outside of the viewport.
type ViewRegions ¶
type ViewRegions struct {
// The Regions this ViewRegions object is relevant to.
Regions text.RegionSet
// The scope identifier is used to determine colour and other style options.
Scope string
// Gutter icon (displayed next to line numbers) URI.
Icon string
// Flags used to hint at how the region should be rendered.
Flags ViewRegionFlags
}
The ViewRegions object contains information related to the rendering of a specific RegionSet and can be set both by a https://godoc.org/github.com/limetext/lime/backend/parser#SyntaxHighlighter and from plugins via https://godoc.org/github.com/limetext/lime/backend#View.AddRegions.
Turning this information into a concrete https://godoc.org/github.com/limetext/lime/backend/render#Flavour is the job of the https://godoc.org/github.com/limetext/lime/backend/render#ColourScheme interface.
func (*ViewRegions) Clone ¶
func (vr *ViewRegions) Clone() *ViewRegions
Creates a copy of this ViewRegions object.
func (*ViewRegions) Cull ¶
func (vr *ViewRegions) Cull(viewport text.Region)
Removes any regions that are outside of the given viewport, and clips the regions that are intersecting it so that all regions remaining are fully contained inside of the viewport.
Source Files