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Sanity check input

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This commit is contained in:
Johan Walles 2019-10-27 21:40:30 +01:00
parent 3f35a545f9
commit 7b935e7c49
2 changed files with 25 additions and 17 deletions
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18
m/ansiTokenizer.go
View File

@ -2,6 +2,7 @@ package m
import (
"errors"
"fmt"
"log"
"regexp"
"strings"
@ -213,7 +214,7 @@ func _UpdateStyle(logger *log.Logger, style tcell.Style, escapeSequence string)
case "38":
var err error = nil
var color *tcell.Color
index, color, err = consumeCompositeColor(numbers, index-1, style)
index, color, err = consumeCompositeColor(numbers, index-1)
if err != nil {
logger.Printf("Foreground: %s", err.Error())
return style
@ -242,7 +243,7 @@ func _UpdateStyle(logger *log.Logger, style tcell.Style, escapeSequence string)
case "48":
var err error = nil
var color *tcell.Color
index, color, err = consumeCompositeColor(numbers, index-1, style)
index, color, err = consumeCompositeColor(numbers, index-1)
if err != nil {
logger.Printf("Background: %s", err.Error())
return style
@ -259,13 +260,20 @@ func _UpdateStyle(logger *log.Logger, style tcell.Style, escapeSequence string)
return style
}
// numbers is from a ANSI SGR string
// numbers is a list of numbers from a ANSI SGR string
// index points to either 38 or 48 in that string
// style is the base style that this function will modify
//
// This method will return:
// * The first index in the string that this function did not consume
// * A color value that can be applied to a style
func consumeCompositeColor(numbers []string, index int, style tcell.Style) (int, *tcell.Color, error) {
func consumeCompositeColor(numbers []string, index int) (int, *tcell.Color, error) {
if numbers[index] != "38" && numbers[index] != "48" {
err := fmt.Errorf(
"Unknown start of color sequence <%s>, expected 38 (foreground) or 48 (background): <CSI %sm>",
numbers[index],
strings.Join(numbers[index:], ";"))
return -1, nil, err
}
return -1, nil, errors.New("Unimplemented")
}

24
m/ansiTokenizer_test.go
View File

@ -52,13 +52,13 @@ func TestTokenize(t *testing.T) {
func TestConsumeCompositeColorHappy(t *testing.T) {
// 8 bit color
// Example from: https://github.com/walles/moar/issues/14
newIndex, color, err := consumeCompositeColor([]string{"38", "5", "74"}, 0, tcell.StyleDefault)
newIndex, color, err := consumeCompositeColor([]string{"38", "5", "74"}, 0)
assert.NilError(t, err)
assert.Equal(t, newIndex, 3)
assert.Equal(t, color, tcell.Color74)
// 24 bit color
newIndex, color, err = consumeCompositeColor([]string{"38", "2", "10", "20", "30"}, 0, tcell.StyleDefault)
newIndex, color, err = consumeCompositeColor([]string{"38", "2", "10", "20", "30"}, 0)
assert.NilError(t, err)
assert.Equal(t, newIndex, 3)
assert.Equal(t, color, tcell.NewRGBColor(10, 20, 30))
@ -67,13 +67,13 @@ func TestConsumeCompositeColorHappy(t *testing.T) {
func TestConsumeCompositeColorHappyMidSequence(t *testing.T) {
// 8 bit color
// Example from: https://github.com/walles/moar/issues/14
newIndex, color, err := consumeCompositeColor([]string{"whatever", "38", "5", "74"}, 1, tcell.StyleDefault)
newIndex, color, err := consumeCompositeColor([]string{"whatever", "38", "5", "74"}, 1)
assert.NilError(t, err)
assert.Equal(t, newIndex, 4)
assert.Equal(t, color, tcell.Color74)
// 24 bit color
newIndex, color, err = consumeCompositeColor([]string{"whatever", "38", "2", "10", "20", "30"}, 1, tcell.StyleDefault)
newIndex, color, err = consumeCompositeColor([]string{"whatever", "38", "2", "10", "20", "30"}, 1)
assert.NilError(t, err)
assert.Equal(t, newIndex, 4)
assert.Equal(t, color, tcell.NewRGBColor(10, 20, 30))
@ -82,46 +82,46 @@ func TestConsumeCompositeColorHappyMidSequence(t *testing.T) {
func TestConsumeCompositeColorBadPrefix(t *testing.T) {
// 8 bit color
// Example from: https://github.com/walles/moar/issues/14
_, color, err := consumeCompositeColor([]string{"29"}, 0, tcell.StyleDefault)
_, color, err := consumeCompositeColor([]string{"29"}, 0)
assert.Equal(t, err.Error(), "Unknown start of color sequence <29>, expected 38 (foreground) or 48 (background): <CSI 29m>")
assert.Equal(t, color, nil)
// Same test but mid-sequence, with initial index > 0
_, color, err = consumeCompositeColor([]string{"whatever", "29"}, 1, tcell.StyleDefault)
_, color, err = consumeCompositeColor([]string{"whatever", "29"}, 1)
assert.Equal(t, err.Error(), "Unknown start of color sequence <29>, expected 38 (foreground) or 48 (background): <CSI 29m>")
assert.Equal(t, color, nil)
}
func TestConsumeCompositeColorBadType(t *testing.T) {
_, color, err := consumeCompositeColor([]string{"38", "4"}, 0, tcell.StyleDefault)
_, color, err := consumeCompositeColor([]string{"38", "4"}, 0)
// https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
assert.Equal(t, err.Error(), "Unknown color type <4>, expected 5 (8 bit color) or 2 (24 bit color): <CSI 38;4m>")
assert.Equal(t, color, nil)
// Same test but mid-sequence, with initial index > 0
_, color, err = consumeCompositeColor([]string{"whatever", "38", "4"}, 1, tcell.StyleDefault)
_, color, err = consumeCompositeColor([]string{"whatever", "38", "4"}, 1)
assert.Equal(t, err.Error(), "Unknown color type <4>, expected 5 (8 bit color) or 2 (24 bit color): <CSI 38;4m>")
assert.Equal(t, color, nil)
}
func TestConsumeCompositeColorIncomplete8Bit(t *testing.T) {
_, color, err := consumeCompositeColor([]string{"38", "5"}, 0, tcell.StyleDefault)
_, color, err := consumeCompositeColor([]string{"38", "5"}, 0)
assert.Equal(t, err.Error(), "Incomplete 8 bit color sequence: <CSI 38;5m>")
assert.Equal(t, color, nil)
// Same test, mid-sequence
_, color, err = consumeCompositeColor([]string{"whatever", "38", "5"}, 1, tcell.StyleDefault)
_, color, err = consumeCompositeColor([]string{"whatever", "38", "5"}, 1)
assert.Equal(t, err.Error(), "Incomplete 8 bit color sequence: <CSI 38;5m>")
assert.Equal(t, color, nil)
}
func TestConsumeCompositeColorIncomplete24Bit(t *testing.T) {
_, color, err := consumeCompositeColor([]string{"38", "2", "10", "20"}, 0, tcell.StyleDefault)
_, color, err := consumeCompositeColor([]string{"38", "2", "10", "20"}, 0)
assert.Equal(t, err.Error(), "Incomplete 24 bit color sequence, expected N8;2;R;G;Bm: <CSI 38;2;10;20m>")
assert.Equal(t, color, nil)
// Same test, mid-sequence
_, color, err = consumeCompositeColor([]string{"whatever", "38", "2", "10", "20"}, 1, tcell.StyleDefault)
_, color, err = consumeCompositeColor([]string{"whatever", "38", "2", "10", "20"}, 1)
assert.Equal(t, err.Error(), "Incomplete 24 bit color sequence, expected N8;2;R;G;Bm: <CSI 38;2;10;20m>")
assert.Equal(t, color, nil)
}