Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
* add color code parser * process font style * build labels by looping though each html character
- Loading branch information
1 parent
cb68f3c
commit 1e4bb07
Showing
9 changed files
with
660 additions
and
106 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| package renderers | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "image/color" | ||
| "regexp" | ||
| "strconv" | ||
| "strings" | ||
| ) | ||
|
|
||
| const ( | ||
| hexRegexString = "^#(?:[0-9a-fA-F]{3}|[0-9a-fA-F]{6})$" | ||
| hexFormat = "#%02x%02x%02x" | ||
| hexShortFormat = "#%1x%1x%1x" | ||
| hexToRGBFactor = 17 | ||
|
|
||
| rgbString = "rgb(%d,%d,%d)" | ||
| rgbRegexString = "^rgb\\(\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*\\)$" | ||
| rgbaString = "rgba(%d,%d,%d,%g)" | ||
| rgbaRegexString = "^rgba\\(\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(0\\.[0-9]*|[01])\\s*\\)$" | ||
| ) | ||
|
|
||
| var ( | ||
| hexRegex = regexp.MustCompile(hexRegexString) | ||
| rgbRegex = regexp.MustCompile(rgbRegexString) | ||
| rgbaRegex = regexp.MustCompile(rgbaRegexString) | ||
|
|
||
| errBadHexCode = errors.New("Bad hex color code") | ||
| errBadRGBCode = errors.New("Bad rgb color code") | ||
| ) | ||
|
|
||
| func parseColorCode(colorCode string) (color.NRGBA, bool) { | ||
| colorCode = strings.ToLower(colorCode) | ||
|
|
||
| if col, ok := parseHex(colorCode); ok { | ||
| return col, ok | ||
| } | ||
|
|
||
| if col, ok := parseRGB(colorCode); ok { | ||
| return col, ok | ||
| } | ||
|
|
||
| if col, ok := parseRGBA(colorCode); ok { | ||
| return col, ok | ||
| } | ||
|
|
||
| return color.NRGBA{}, false | ||
| } | ||
|
|
||
| func parseHex(colorCode string) (color.NRGBA, bool) { | ||
| if !hexRegex.MatchString(colorCode) { | ||
| return color.NRGBA{}, false | ||
| } | ||
|
|
||
| var r, g, b uint8 | ||
| if len(colorCode) == 4 { | ||
| fmt.Sscanf(colorCode, hexShortFormat, &r, &g, &b) | ||
| r *= hexToRGBFactor | ||
| g *= hexToRGBFactor | ||
| b *= hexToRGBFactor | ||
| } else { | ||
| fmt.Sscanf(colorCode, hexFormat, &r, &g, &b) | ||
| } | ||
|
|
||
| return color.NRGBA{R: r, G: g, B: b, A: 255}, true | ||
| } | ||
|
|
||
| func parseRGB(colorCode string) (color.NRGBA, bool) { | ||
| parts := rgbRegex.FindAllStringSubmatch(colorCode, -1) | ||
| if len(parts) == 0 || len(parts[0]) == 0 { | ||
| return color.NRGBA{}, false | ||
| } | ||
|
|
||
| r, _ := strconv.ParseUint(parts[0][1], 10, 8) | ||
| g, _ := strconv.ParseUint(parts[0][2], 10, 8) | ||
| b, _ := strconv.ParseUint(parts[0][3], 10, 8) | ||
|
|
||
| return color.NRGBA{R: uint8(r), G: uint8(g), B: uint8(b), A: 255}, true | ||
| } | ||
|
|
||
| func parseRGBA(colorCode string) (color.NRGBA, bool) { | ||
| parts := rgbaRegex.FindAllStringSubmatch(colorCode, -1) | ||
| if len(parts) == 0 || len(parts[0]) == 0 { | ||
| return color.NRGBA{}, false | ||
| } | ||
|
|
||
| r, _ := strconv.ParseUint(parts[0][1], 10, 8) | ||
| g, _ := strconv.ParseUint(parts[0][2], 10, 8) | ||
| b, _ := strconv.ParseUint(parts[0][3], 10, 8) | ||
| a, _ := strconv.ParseFloat(parts[0][4], 64) | ||
|
|
||
| return color.NRGBA{R: uint8(r), G: uint8(g), B: uint8(b), A: uint8(a)}, true | ||
| } |
Oops, something went wrong.