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128 lines
2.8 KiB
128 lines
2.8 KiB
// Copyright 2013 Google Inc. All rights reserved. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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package pretty |
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import ( |
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"bytes" |
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"strconv" |
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"strings" |
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) |
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type node interface { |
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WriteTo(w *bytes.Buffer, indent string, cfg *Config) |
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} |
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func compactString(n node) string { |
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switch k := n.(type) { |
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case stringVal: |
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return string(k) |
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case rawVal: |
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return string(k) |
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} |
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buf := new(bytes.Buffer) |
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n.WriteTo(buf, "", &Config{Compact: true}) |
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return buf.String() |
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} |
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type stringVal string |
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func (str stringVal) WriteTo(w *bytes.Buffer, indent string, cfg *Config) { |
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w.WriteString(strconv.Quote(string(str))) |
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} |
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type rawVal string |
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func (r rawVal) WriteTo(w *bytes.Buffer, indent string, cfg *Config) { |
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w.WriteString(string(r)) |
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} |
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type keyval struct { |
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key string |
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val node |
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} |
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type keyvals []keyval |
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func (l keyvals) Len() int { return len(l) } |
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func (l keyvals) Swap(i, j int) { l[i], l[j] = l[j], l[i] } |
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func (l keyvals) Less(i, j int) bool { return l[i].key < l[j].key } |
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func (l keyvals) WriteTo(w *bytes.Buffer, indent string, cfg *Config) { |
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keyWidth := 0 |
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for _, kv := range l { |
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if kw := len(kv.key); kw > keyWidth { |
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keyWidth = kw |
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} |
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} |
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padding := strings.Repeat(" ", keyWidth+1) |
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inner := indent + " " + padding |
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w.WriteByte('{') |
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for i, kv := range l { |
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if cfg.Compact { |
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w.WriteString(kv.key) |
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w.WriteByte(':') |
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} else { |
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if i > 0 || cfg.Diffable { |
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w.WriteString("\n ") |
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w.WriteString(indent) |
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} |
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w.WriteString(kv.key) |
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w.WriteByte(':') |
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w.WriteString(padding[len(kv.key):]) |
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} |
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kv.val.WriteTo(w, inner, cfg) |
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if i+1 < len(l) || cfg.Diffable { |
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w.WriteByte(',') |
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} |
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} |
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if !cfg.Compact && cfg.Diffable && len(l) > 0 { |
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w.WriteString("\n") |
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w.WriteString(indent) |
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} |
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w.WriteByte('}') |
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} |
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type list []node |
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func (l list) WriteTo(w *bytes.Buffer, indent string, cfg *Config) { |
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if max := cfg.ShortList; max > 0 { |
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short := compactString(l) |
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if len(short) <= max { |
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w.WriteString(short) |
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return |
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} |
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} |
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inner := indent + " " |
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w.WriteByte('[') |
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for i, v := range l { |
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if !cfg.Compact && (i > 0 || cfg.Diffable) { |
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w.WriteByte('\n') |
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w.WriteString(inner) |
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} |
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v.WriteTo(w, inner, cfg) |
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if i+1 < len(l) || cfg.Diffable { |
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w.WriteByte(',') |
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} |
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} |
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if !cfg.Compact && cfg.Diffable && len(l) > 0 { |
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w.WriteByte('\n') |
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w.WriteString(indent) |
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} |
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w.WriteByte(']') |
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}
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