feat: support customize title

2022-01-01 20:11:51 +08:00 · 2022-01-01 20:11:51 +08:00 · 25e9984ad8
commit 25e9984ad8
parent 06c326bdc3
8 changed files with 167 additions and 7 deletions
--- a/title_test.go
+++ b/title_test.go
@ -0,0 +1,85 @@
+// MIT License
+
+// Copyright (c) 2021 Tree Xie
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package charts
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/wcharczuk/go-chart/v2"
+	"github.com/wcharczuk/go-chart/v2/drawing"
+)
+
+func TestTitleCustomize(t *testing.T) {
+	assert := assert.New(t)
+	tests := []struct {
+		title Title
+		svg   string
+	}{
+		// 单行标题
+		{
+			title: Title{
+				Text: "Hello World!",
+				Style: chart.Style{
+					FontColor: drawing.ColorBlack,
+				},
+			},
+			svg: "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"800\" height=\"600\">\\n<text x=\"50\" y=\"71\" style=\"stroke-width:0;stroke:none;fill:rgba(0,0,0,1.0);font-size:23.0px;font-family:'Roboto Medium',sans-serif\">Hello World!</text></svg>",
+		},
+		// 多行标题，靠右
+		{
+			title: Title{
+				Text: "Hello World!\nHello World",
+				Style: chart.Style{
+					FontColor: drawing.ColorBlack,
+				},
+				Left: "right",
+			},
+			svg: "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"800\" height=\"600\">\\n<text x=\"474\" y=\"71\" style=\"stroke-width:0;stroke:none;fill:rgba(0,0,0,1.0);font-size:23.0px;font-family:'Roboto Medium',sans-serif\">Hello World!</text><text x=\"477\" y=\"94\" style=\"stroke-width:0;stroke:none;fill:rgba(0,0,0,1.0);font-size:23.0px;font-family:'Roboto Medium',sans-serif\">Hello World</text></svg>",
+		},
+		// 标题居中
+		{
+			title: Title{
+				Text: "Hello World!",
+				Style: chart.Style{
+					FontColor: drawing.ColorBlack,
+				},
+				Left: "center",
+			},
+			svg: "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"800\" height=\"600\">\\n<text x=\"262\" y=\"71\" style=\"stroke-width:0;stroke:none;fill:rgba(0,0,0,1.0);font-size:23.0px;font-family:'Roboto Medium',sans-serif\">Hello World!</text></svg>",
+		},
+	}
+	for _, tt := range tests {
+		r, err := chart.SVG(800, 600)
+		assert.Nil(err)
+		fn := NewTitleCustomize(tt.title)
+		fn(r, chart.NewBox(50, 50, 600, 400), chart.Style{
+			Font: chart.StyleTextDefaults().Font,
+		})
+		buf := bytes.Buffer{}
+		err = r.Save(&buf)
+		assert.Nil(err)
+		assert.Equal(tt.svg, buf.String())
+	}
+}