Initial commit for svg context

Satisfy draw2dc.GrapghicContext using empty methods

draw2dsvg/doc.go

@@ -0,0 +1,11 @@
+// Copyright 2015 The draw2d Authors. All rights reserved.
+// created: 16/12/2017 by Drahoslav Bednář
+
+// Package draw2svg provides a graphic context that can draw
+// vector graphics and text on svg file using the svgo package.
+//
+// Quick Start
+// The following Go code geneartes a simple drawing and saves it
+// to a svg document:
+// 	// TODO
+package draw2dsvg

draw2dsvg/fileutil.go

@@ -0,0 +1,24 @@
+package draw2dsvg
+
+import (
+	"os"
+	"bytes"
+	"errors"
+	svgo "github.com/ajstarks/svgo/float"
+)
+
+func SaveToSvgFile(filePath string, svg *svgo.SVG) error {
+	f, err := os.Create(filePath)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	if b, ok := svg.Writer.(*bytes.Buffer); ok {
+		bytes.NewBuffer(b.Bytes()).WriteTo(f) // clone buffer to make multiple writes possible
+	} else {
+		return errors.New("Svg has not been not created from with NewSvg (dow not have byte.Buffer as its Writer)")
+	}
+
+	return nil
+}

draw2dsvg/gc.go

@@ -0,0 +1,182 @@
+// Copyright 2015 The draw2d Authors. All rights reserved.
+// created: 16/12/2017 by Drahoslav Bednář
+
+package draw2dsvg
+
+import (
+	"image"
+	"bytes"
+	"image/color"
+	"github.com/llgcode/draw2d"
+	"github.com/llgcode/draw2d/draw2dbase"
+	svgo "github.com/ajstarks/svgo/float"
+)
+
+const (
+)
+
+var (
+)
+
+func NewSvg() *svgo.SVG {
+	return svgo.New(&bytes.Buffer{})
+}
+
+// GraphicContext implements the draw2d.GraphicContext interface
+// It provides draw2d with a svg backend (based on svgo)
+type GraphicContext struct {
+	*draw2dbase.StackGraphicContext
+	svg *svgo.SVG
+}
+
+func NewGraphicContext(svg *svgo.SVG) *GraphicContext {
+	gc := &GraphicContext{draw2dbase.NewStackGraphicContext(), svg}
+	return gc
+}
+
+// TODO implement all following methods
+
+// BeginPath creates a new path
+func (gc *GraphicContext) BeginPath() {
+
+}
+// GetPath copies the current path, then returns it
+func (gc *GraphicContext) GetPath() draw2d.Path {
+	return draw2d.Path{}
+}
+// GetMatrixTransform returns the current transformation matrix
+func (gc *GraphicContext) GetMatrixTransform() draw2d.Matrix {
+	return draw2d.Matrix{}
+}
+// SetMatrixTransform sets the current transformation matrix
+func (gc *GraphicContext) SetMatrixTransform(tr draw2d.Matrix) {
+
+}
+// ComposeMatrixTransform composes the current transformation matrix with tr
+func (gc *GraphicContext) ComposeMatrixTransform(tr draw2d.Matrix) {
+
+}
+// Rotate applies a rotation to the current transformation matrix. angle is in radian.
+func (gc *GraphicContext) Rotate(angle float64) {
+
+}
+// Translate applies a translation to the current transformation matrix.
+func (gc *GraphicContext) Translate(tx, ty float64) {
+
+}
+// Scale applies a scale to the current transformation matrix.
+func (gc *GraphicContext) Scale(sx, sy float64) {
+
+}
+// SetStrokeColor sets the current stroke color
+func (gc *GraphicContext) SetStrokeColor(c color.Color) {
+
+}
+// SetFillColor sets the current fill color
+func (gc *GraphicContext) SetFillColor(c color.Color) {
+
+}
+// SetFillRule sets the current fill rule
+func (gc *GraphicContext) SetFillRule(f draw2d.FillRule) {
+
+}
+// SetLineWidth sets the current line width
+func (gc *GraphicContext) SetLineWidth(lineWidth float64) {
+
+}
+// SetLineCap sets the current line cap
+func (gc *GraphicContext) SetLineCap(cap draw2d.LineCap) {
+
+}
+// SetLineJoin sets the current line join
+func (gc *GraphicContext) SetLineJoin(join draw2d.LineJoin) {
+
+}
+// SetLineDash sets the current dash
+func (gc *GraphicContext) SetLineDash(dash []float64, dashOffset float64) {
+
+}
+// SetFontSize sets the current font size
+func (gc *GraphicContext) SetFontSize(fontSize float64) {
+
+}
+// GetFontSize gets the current font size
+func (gc *GraphicContext) GetFontSize() float64 {
+	return 0
+}
+// SetFontData sets the current FontData
+func (gc *GraphicContext) SetFontData(fontData draw2d.FontData) {
+
+}
+// GetFontData gets the current FontData
+func (gc *GraphicContext) GetFontData() draw2d.FontData {
+	return draw2d.FontData{}
+}
+// GetFontName gets the current FontData as a string
+func (gc *GraphicContext) GetFontName() string {
+	return ""
+}
+// DrawImage draws the raster image in the current canvas
+func (gc *GraphicContext) DrawImage(image image.Image) {
+
+}
+// Save the context and push it to the context stack
+func (gc *GraphicContext) Save() {
+
+}
+// Restore remove the current context and restore the last one
+func (gc *GraphicContext) Restore() {
+
+}
+// Clear fills the current canvas with a default transparent color
+func (gc *GraphicContext) Clear() {
+
+}
+// ClearRect fills the specified rectangle with a default transparent color
+func (gc *GraphicContext) ClearRect(x1, y1, x2, y2 int) {
+
+}
+// SetDPI sets the current DPI
+func (gc *GraphicContext) SetDPI(dpi int) {
+
+}
+// GetDPI gets the current DPI
+func (gc *GraphicContext) GetDPI() int {
+	return 0
+}
+// GetStringBounds gets pixel bounds(dimensions) of given string
+func (gc *GraphicContext) GetStringBounds(s string) (left, top, right, bottom float64) {
+	return 0, 0, 0, 0
+}
+// CreateStringPath creates a path from the string s at x, y
+func (gc *GraphicContext) CreateStringPath(text string, x, y float64) (cursor float64) {
+	return 0
+}
+// FillString draws the text at point (0, 0)
+func (gc *GraphicContext) FillString(text string) (cursor float64) {
+	return 0
+}
+// FillStringAt draws the text at the specified point (x, y)
+func (gc *GraphicContext) FillStringAt(text string, x, y float64) (cursor float64) {
+	return 0
+}
+// StrokeString draws the contour of the text at point (0, 0)
+func (gc *GraphicContext) StrokeString(text string) (cursor float64) {
+	return 0
+}
+// StrokeStringAt draws the contour of the text at point (x, y)
+func (gc *GraphicContext) StrokeStringAt(text string, x, y float64) (cursor float64) {
+	return 0
+}
+// Stroke strokes the paths with the color specified by SetStrokeColor
+func (gc *GraphicContext) Stroke(paths ...*draw2d.Path) {
+
+}
+// Fill fills the paths with the color specified by SetFillColor
+func (gc *GraphicContext) Fill(paths ...*draw2d.Path) {
+
+}
+// FillStroke first fills the paths and than strokes them
+func (gc *GraphicContext) FillStroke(paths ...*draw2d.Path) {
+
+}

draw2dsvg/test_test.go

@@ -0,0 +1,31 @@
+// Copyright 2015 The draw2d Authors. All rights reserved.
+// created: 16/12/2017 by Drahoslav Bednář
+
+// Package draw2dsvg_test gives test coverage with the command:
+// go test -cover ./... | grep -v "no test"
+// (It should be run from its parent draw2d directory.)
+package draw2dsvg_test
+
+import (
+	"testing"
+	"github.com/llgcode/draw2d"
+	"github.com/llgcode/draw2d/draw2dsvg"
+)
+
+type sample func(gc draw2d.GraphicContext, ext string) (string, error)
+
+func test(t *testing.T, draw sample) {
+	// Initialize the graphic context on an pdf document
+	dest := draw2dsvg.NewSvg()
+	gc := draw2dsvg.NewGraphicContext(dest)
+	// Draw sample
+	output, err := draw(gc, "svg")
+	if err != nil {
+		t.Errorf("Drawing %q failed: %v", output, err)
+		return
+	}
+	err = draw2dsvg.SaveToSvgFile(output, dest)
+	if err != nil {
+		t.Errorf("Saving %q failed: %v", output, err)
+	}
+}