/
style.go
442 lines (405 loc) · 8.75 KB
/
style.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
package tableimage
import (
"errors"
"image"
"github.com/golang/freetype/truetype"
"github.com/llgcode/draw2d"
)
// DefaultStyle default style setting
var DefaultStyle = func() *Style {
return &Style{
Color: DefaultColor,
Border: DefaultBorder(),
LineHeight: DefaultLineHeight,
Padding: NewPadding(DefaultPadding),
Align: LEFT,
VAlign: MIDDLE,
Font: &Font{
Size: DefaultFontSize,
},
}
}
// DefaultCaptionStyle default caption style setting
var DefaultCaptionStyle = func() *Style {
return &Style{
Color: DefaultColor,
Border: NoBorder(),
LineHeight: DefaultLineHeight,
Padding: NewPaddingY(DefaultPadding),
Align: LEFT,
VAlign: TOP,
Font: &Font{
Size: DefaultFontSize,
},
}
}
// DefaultFooterStyle default table footer style setting
var DefaultFooterStyle = func() *Style {
return &Style{
Color: DefaultColor,
Border: NoBorder(),
LineHeight: DefaultLineHeight,
Padding: NewPaddingY(DefaultPadding),
Align: RIGHT,
VAlign: TOP,
Font: &Font{
Size: DefaultFontSize,
},
}
}
// DefaultLine default line setting
var DefaultLine = func() Line {
return Line{
Color: DefaultColor,
Width: DefaultBorderWidth,
}
}
// DefaultBorder default border setting
var DefaultBorder = func() *Border {
return &Border{
Top: DefaultLine(),
Right: DefaultLine(),
Bottom: DefaultLine(),
Left: DefaultLine(),
}
}
// NoBorder no border setting
var NoBorder = func() *Border {
return &Border{}
}
// Style for drawing
type Style struct {
// Color text color
Color string `json:"color,omitempty"`
// Border cell border setting
Border *Border `json:"border,omitempty"`
// BgColor cell background color
BgColor string `json:"bg_color,omitempty"`
// Lineheight lineheight for paragraph
LineHeight float64 `json:"line_height,omitempty"`
// Margin cell margin
Margin *Padding `json:"margin,omitempty"`
// Padding cell padding
Padding *Padding `json:"padding,omitempty"`
// MaxWidth max width
MaxWidth int `json:"max_width,omitempty"`
// Align alignment
Align Align `json:"align,omitempty"`
// VAlign vertical alignment
VAlign VAlign `json:"valign,omitempty"`
// Font font setting
Font *Font `json:"font,omitempty"`
}
// Inherit from other style
func (s *Style) Inherit(s1 *Style, cache draw2d.FontCache) error {
if s1 == nil {
return nil
}
if s.Color == "" {
s.Color = s1.Color
}
if s.Border == nil {
s.Border = s1.Border
}
if s.BgColor == "" {
s.BgColor = s1.BgColor
}
if s.Margin != nil {
s.Margin = s1.Margin
}
if s.Padding == nil {
s.Padding = s1.Padding
}
if s.LineHeight < 1e-15 {
s.LineHeight = s1.LineHeight
}
if s.MaxWidth == 0 {
s.MaxWidth = s1.MaxWidth
}
if s.Align == UnknownAlign {
s.Align = s1.Align
}
if s.VAlign == UnknownVAlign {
s.VAlign = s1.VAlign
}
return s.inheritFont(s1, cache)
}
func (s *Style) inheritFont(s1 *Style, cache draw2d.FontCache) error {
if s.Font == nil {
s.Font = s1.Font
if err := s.LoadFont(cache); err != nil {
return err
}
} else {
if err := s.LoadFont(cache); err != nil {
return err
}
if s1.Font != nil {
if s.Font.Size < 1e-15 {
s.Font.Size = s1.Font.Size
}
if s.Font.Data == nil {
s.Font.Data = s1.Font.Data
}
if s.Font.Font == nil {
s.Font.Font = s1.Font.Font
}
if s.Font.DPI <= 0 {
s.Font.DPI = s1.Font.DPI
}
}
}
return nil
}
// LoadFont load font with fontCache
func (s *Style) LoadFont(cache draw2d.FontCache) error {
if s.Font == nil {
return nil
}
return s.Font.Load(cache)
}
// BorderSize outer bound size
func (s Style) BorderSize() image.Point {
var (
x int
y int
)
if s.Margin != nil {
pt := s.Margin.Size()
x += pt.X
y += pt.Y
}
if s.Border != nil {
pt := s.Border.Size()
x += pt.X
y += pt.Y
}
if s.Padding != nil {
pt := s.Padding.Size()
x += pt.X
y += pt.Y
}
return image.Pt(x, y)
}
// InnerStart content start point
func (s Style) InnerStart() image.Point {
var (
x int
y int
)
if s.Margin != nil {
x += s.Margin.Left
}
if s.Border != nil {
x += s.Border.Left.Width
}
if s.Padding != nil {
x += s.Padding.Left
}
if s.Margin != nil {
y += s.Margin.Top
}
if s.Border != nil {
y += s.Border.Top.Width
}
if s.Padding != nil {
y += s.Padding.Top
}
return image.Pt(x, y)
}
// InnerEnd content end point
func (s Style) InnerEnd() image.Point {
var (
x int
y int
)
if s.Margin != nil {
x += s.Margin.Right
}
if s.Border != nil {
x += s.Border.Right.Width
}
if s.Padding != nil {
x += s.Padding.Right
}
if s.Margin != nil {
y += s.Margin.Bottom
}
if s.Border != nil {
y += s.Border.Bottom.Width
}
if s.Padding != nil {
y += s.Padding.Bottom
}
return image.Pt(x, y)
}
// InnerBounds content bounds
func (s Style) InnerBounds(bounds image.Rectangle) image.Rectangle {
return image.Rectangle{
Min: bounds.Min.Add(s.InnerStart()),
Max: bounds.Max.Sub(s.InnerEnd()),
}
}
// BorderPadding border padding
func (s Style) BorderPadding() Padding {
padding := ZeroPadding
if s.Margin != nil {
padding.Add(*s.Margin)
}
if s.Border != nil {
padding.Add(s.Border.Padding())
}
if s.Padding != nil {
padding.Add(*s.Padding)
}
return padding
}
// Border border setting
type Border struct {
Top Line `json:"top,omitempty"`
Right Line `json:"right,omitempty"`
Bottom Line `json:"bottom,omitempty"`
Left Line `json:"left,omitempty"`
}
// ChangeColor change border color
func (b *Border) ChangeColor(color string) {
b.Top = b.Top.ChangeColor(color)
b.Right = b.Right.ChangeColor(color)
b.Bottom = b.Bottom.ChangeColor(color)
b.Left = b.Left.ChangeColor(color)
}
// ChangeWidth change border width
func (b *Border) ChangeWidth(width int) {
b.Top = b.Top.ChangeWidth(width)
b.Right = b.Right.ChangeWidth(width)
b.Bottom = b.Bottom.ChangeWidth(width)
b.Left = b.Left.ChangeWidth(width)
}
// Padding border padding
func (b Border) Padding() Padding {
return Padding{
Top: b.Top.Width,
Right: b.Right.Width,
Bottom: b.Bottom.Width,
Left: b.Left.Width,
}
}
// Size border border size
func (b Border) Size() image.Point {
return image.Pt(b.Left.Width+b.Right.Width, b.Top.Width+b.Bottom.Width)
}
// Draw a border
func (b Border) Draw(img *image.RGBA, bounds image.Rectangle) {
b.Top.Draw(img, image.Rect(bounds.Min.X, bounds.Min.Y, bounds.Max.X, bounds.Min.Y))
b.Right.Draw(img, image.Rect(bounds.Max.X, bounds.Min.Y, bounds.Max.X, bounds.Max.Y))
b.Bottom.Draw(img, image.Rect(bounds.Min.X, bounds.Max.Y, bounds.Max.X, bounds.Max.Y))
b.Left.Draw(img, image.Rect(bounds.Min.X, bounds.Min.Y, bounds.Min.X, bounds.Max.Y))
}
// Line border line
type Line struct {
Color string `json:"color,omitempty"`
Width int `json:"width,omitempty"`
}
// ChangeColor return a line with new color
func (l Line) ChangeColor(color string) Line {
l.Color = color
return l
}
// ChangeWidth return a line with new width
func (l Line) ChangeWidth(width int) Line {
l.Width = width
return l
}
// Draw a new line
func (l Line) Draw(img *image.RGBA, bounds image.Rectangle) {
if l.Width == 0 {
return
}
drawRect(img, bounds, l.Color, l.Color, float64(l.Width))
}
// ZeroPadding zero padding object
var ZeroPadding = Padding{}
// Padding cell padding
type Padding struct {
// Top padding
Top int `json:"top,omitempty"`
// Right padding
Right int `json:"right,omitempty"`
// Bottom padding
Bottom int `json:"bottom,omitempty"`
// Left padding
Left int `json:"left,omitempty"`
}
// NewPadding init padding with same value
func NewPadding(padding int) *Padding {
return &Padding{
Top: padding,
Right: padding,
Bottom: padding,
Left: padding,
}
}
// NewPaddingY init padding with top/bottom
func NewPaddingY(y int) *Padding {
return &Padding{
Top: y,
Bottom: y,
}
}
// NewPaddingX init padding with left/right
func NewPaddingX(x int) *Padding {
return &Padding{
Right: x,
Left: x,
}
}
// NewPaddingXY init padding for both x / y
func NewPaddingXY(x int, y int) *Padding {
return &Padding{
Top: y,
Right: x,
Bottom: y,
Left: x,
}
}
// Add merget tow paddings
func (p Padding) Add(p2 Padding) Padding {
p.Left += p2.Left
p.Top += p2.Top
p.Right += p2.Right
p.Bottom += p2.Bottom
return p
}
// Size padding size
func (p Padding) Size() image.Point {
return image.Pt(p.Left+p.Right, p.Top+p.Bottom)
}
// Font font info
type Font struct {
// Size font size
Size float64 `json:"size,omitempty"`
// Data font setting
Data *draw2d.FontData `json:"data,omitempty"`
// Font
Font *truetype.Font `json:"-"`
// DPI
DPI int `json:"dpi,omitempty"`
}
// Load font from font cache
func (f *Font) Load(cache draw2d.FontCache) error {
if f.Font != nil {
return nil
}
if f.Data == nil {
return nil
}
if cache == nil {
return errors.New("missing font cache")
}
ft, err := cache.Load(*f.Data)
if err != nil {
return err
}
f.Font = ft
return nil
}