Simplify drawable interface, remove unnecessary methods.

pdf/creator/chapters.go

@@ -8,7 +8,6 @@ package creator
 import (
 	"errors"
 	"fmt"
-	"math"
 
 	"github.com/unidoc/unidoc/common"
 	"github.com/unidoc/unidoc/pdf/model/fonts"
@@ -88,24 +87,6 @@ func (chap *Chapter) GetHeading() *paragraph {
 	return chap.heading
 }
 
-// Chapter height is a sum of the content heights.
-func (chap *Chapter) Height() float64 {
-	h := float64(0)
-	for _, d := range chap.contents {
-		h += d.Height()
-	}
-	return h
-}
-
-// Chapter width is the maximum of the content widths.
-func (chap *Chapter) Width() float64 {
-	maxW := float64(0)
-	for _, d := range chap.contents {
-		maxW = math.Max(maxW, d.Width())
-	}
-	return maxW
-}
-
 // Set absolute coordinates.
 func (chap *Chapter) SetPos(x, y float64) {
 	chap.positioning = positionAbsolute

pdf/creator/drawable.go

@@ -7,53 +7,25 @@ package creator
 
 // All widgets that can be used to draw with the creator need to implement the Drawable interface.
 type Drawable interface {
-	// Set absolute position of the widget on the Page/template to be drawn onto.
-	SetPos(x, y float64)
-
-	// Set the left, right, top, bottom Margins.
-	SetMargins(float64, float64, float64, float64)
-
-	// Get the left, right, top, bottom Margins.
-	GetMargins() (float64, float64, float64, float64)
-
-	// Returns the width/height of the drawable.
-	Width() float64
-	Height() float64
-
 	// Draw onto blocks representing Page contents. As the content can wrap over many pages, multiple
 	// templates are returned, one per Page.  The function also takes a draw context containing information
 	// where to draw (if relative positioning) and the available height to draw on accounting for Margins etc.
 	GeneratePageBlocks(ctx DrawContext) ([]*Block, DrawContext, error)
 }
 
-// Some drawables can be scaled. Mostly objects that fit on a single Page.  E.g. image, block.
-type Scalable interface {
-	// Scale the drawable.  Does not actually influence the object contents but rather how it is represented
-	// when drawn to the screen.  I.e. a coordinate transform.
-	// Does change the Width and Height properties.
-	Scale(float64, float64)
-	ScaleToHeight(float64)
-	ScaleToWidth(float64)
-}
-
-// Some drawables can be rotated. Mostly vector graphics that fit on a single Page.  E.g. image, block.
-type Rotatable interface {
-	// Set the rotation angle of the drawable in degrees.
-	// The rotation does not change the dimensions of the Drawable and is only applied at the time of drawing.
-	SetAngle(angleDeg float64)
-}
-
-// Drawing context.  Continuously used when drawing the Page contents.  Keeps track of current X, Y position,
-// available height as well as other Page parameters such as Margins and dimensions.
+// Drawing context.  Continuously used when drawing the page contents.  Keeps track of current X, Y position,
+// available height as well as other page parameters such as margins and dimensions.
 type DrawContext struct {
+	// Current page number.
 	Page int
 
 	// Current position.  In a relative positioning mode, a drawable will be placed at these coordinates.
 	X, Y float64
+
 	// Context dimensions.  Available width and height.
 	Width, Height float64
 
-	// Page Margins...
+	// Page Margins.
 	Margins margins
 
 	// Absolute Page size, widths and height.

pdf/creator/subchapter.go

@@ -8,8 +8,6 @@ package creator
 import (
 	"fmt"
 
-	"math"
-
 	"github.com/unidoc/unidoc/common"
 	"github.com/unidoc/unidoc/pdf/model/fonts"
 )
@@ -64,24 +62,6 @@ func (c *Creator) NewSubchapter(ch *Chapter, title string) *subchapter {
 	return subchap
 }
 
-// Chapter height is a sum of the content heights.
-func (subchap *subchapter) Height() float64 {
-	h := float64(0)
-	for _, d := range subchap.contents {
-		h += d.Height()
-	}
-	return h
-}
-
-// Chapter width is the maximum of the content widths.
-func (subchap *subchapter) Width() float64 {
-	maxW := float64(0)
-	for _, d := range subchap.contents {
-		maxW = math.Max(maxW, d.Width())
-	}
-	return maxW
-}
-
 // Set absolute coordinates.
 func (subchap *subchapter) SetPos(x, y float64) {
 	subchap.positioning = positionAbsolute