mirror of
https://github.com/xiaoqidun/ofdgo.git
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92 lines
3.7 KiB
Go
92 lines
3.7 KiB
Go
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
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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 ofdgo
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import "fmt"
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// editorDrawParam 解析原文档的绘制参数继承链，缺失或循环引用不进入编辑快照
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// 入参: id 绘制参数标识, visited 已访问标识
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// 返回: *DrawParam 合并参数, error 错误信息
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func (e *Editor) editorDrawParam(id string, visited map[string]bool) (*DrawParam, error) {
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if id == "" {
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return &DrawParam{}, nil
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}
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dp := e.source.reader.drawParamCache[id]
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if dp == nil || visited[id] {
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return nil, fmt.Errorf("invalid draw parameter reference %q", id)
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}
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visited[id] = true
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base, err := e.editorDrawParam(dp.Relative, visited)
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if err != nil {
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return nil, err
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}
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return mergeDrawParam(*base, dp), nil
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}
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// resolveEditorStyle 为对象生成独立的有效样式，不改写共享资源或原XML
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// 入参: object 原对象, layer 图层绘制参数标识
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// 返回: GraphicObject 编辑快照, error 错误信息
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func (e *Editor) resolveEditorStyle(object GraphicObject, layer string) (GraphicObject, error) {
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var id string
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switch object.Type {
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case "TextObject":
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id = object.TextObject.DrawParam
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case "PathObject":
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id = object.PathObject.DrawParam
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default:
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return object, nil
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}
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if layer == "" && id == "" {
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return object, nil
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}
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base, err := e.editorDrawParam(layer, make(map[string]bool))
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if err != nil {
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return GraphicObject{}, err
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}
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dp, err := e.editorDrawParam(id, make(map[string]bool))
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if err != nil {
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return GraphicObject{}, err
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}
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style := mergeDrawParam(*base, dp)
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if object.Type == "PathObject" {
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obj := &object.PathObject
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style = mergeDrawParam(*style, &DrawParam{LineWidth: obj.LineWidth, Join: obj.Join, Cap: obj.Cap,
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MiterLimit: obj.MiterLimit, DashPattern: obj.DashPattern, DashOffset: obj.DashOffset,
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FillColor: obj.FillColor, StrokeColor: obj.StrokeColor})
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obj.DrawParam = ""
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obj.LineWidth, obj.Join, obj.Cap = style.LineWidth, style.Join, style.Cap
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obj.MiterLimit, obj.DashPattern, obj.DashOffset = style.MiterLimit, style.DashPattern, style.DashOffset
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obj.FillColor, obj.StrokeColor = style.FillColor, style.StrokeColor
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} else {
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obj := &object.TextObject
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if style.Cap != "" && style.Cap != "Butt" || style.DashPattern != "" || style.DashOffset != nil && *style.DashOffset != 0 {
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return GraphicObject{}, fmt.Errorf("text draw parameters require unsupported stroke styles")
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}
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style = mergeDrawParam(*style, &DrawParam{LineWidth: obj.LineWidth, Join: obj.Join,
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MiterLimit: obj.MiterLimit, FillColor: obj.FillColor, StrokeColor: obj.StrokeColor})
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text := mergeDrawParam(*dp, &DrawParam{Font: obj.Font, Size: obj.Size, Weight: obj.Weight, Italic: obj.Italic})
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obj.DrawParam = ""
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obj.Font, obj.Size, obj.Weight, obj.Italic = text.Font, text.Size, text.Weight, text.Italic
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obj.LineWidth, obj.Join, obj.MiterLimit = style.LineWidth, style.Join, style.MiterLimit
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obj.FillColor, obj.StrokeColor = style.FillColor, style.StrokeColor
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}
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for _, color := range []*FillColor{style.FillColor, (*FillColor)(style.StrokeColor)} {
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if err := creationColor(color); err != nil {
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return GraphicObject{}, fmt.Errorf("unsupported draw parameter color: %w", err)
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}
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}
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return cloneEditorObject(object)
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}
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