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https://github.com/xiaoqidun/ofdgo.git
synced 2026-10-29 08:46:55 +08:00
xiaoqidun committed
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bec13d523f
commit
b3c4bbc844
45 files changed
+1885
-1453
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+7
-143
@@ -22,6 +22,7 @@ import (
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"mime"
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"strings"
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codecpdf "github.com/xiaoqidun/ofdgo/internal/codec/pdf"
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"github.com/xiaoqidun/pdfgo"
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)
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@@ -106,7 +107,7 @@ func (p *pdfImporter) renditionLinkActions(object pdfgo.Object, source pdfgo.Ann
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return nil, err
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}
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if kind == "Video" {
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parameters, _, err := p.renditionParameters(selected.Screen, map[pdfgo.Name]func(pdfgo.Object) bool{
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parameters, _, err := codecpdf.RenditionParameters(p.reader, selected.Screen, map[pdfgo.Name]func(pdfgo.Object) bool{
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"W": func(value pdfgo.Object) bool { return value == pdfgo.Integer(0) || value == pdfgo.Integer(3) },
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})
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if err != nil {
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@@ -155,7 +156,7 @@ func (p *pdfImporter) renditionLinkActions(object pdfgo.Object, source pdfgo.Ann
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// 入参: selected 已选择的原生呈现, kind 媒体类型, playback 播放目标
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// 返回: string 资源标识，不可用时为空, error 文件或资源错误
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func (p *pdfImporter) renditionResource(selected *pdfgo.Rendition, kind string, playback pdfgo.RenditionPlayback) (string, error) {
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format := pdfMediaFormat(*selected.Clip.File)
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format := codecpdf.MediaFormat(*selected.Clip.File)
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if format == "" {
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mediaType, _, _ := mime.ParseMediaType(selected.Clip.ContentType)
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format = strings.TrimPrefix(strings.SplitN(mediaType, "/", 2)[1], "x-")
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@@ -183,7 +184,7 @@ func (p *pdfImporter) renditionActionLoss(reason string, strict bool) error {
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// 返回: Action 播放动作, string 媒体类别, bool 是否可用, error 参数错误
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func (p *pdfImporter) nativeRendition(rendition *pdfgo.Rendition) (Action, string, bool, error) {
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result := Action{Event: "CLICK"}
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viable, err := p.renditionCriteria(rendition)
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viable, err := codecpdf.RenditionCriteria(p.reader, rendition)
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if err != nil || !viable {
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return result, "", false, err
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}
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@@ -217,7 +218,7 @@ func (p *pdfImporter) nativeRendition(rendition *pdfgo.Rendition) (Action, strin
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return result, "", false, nil
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}
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audio := strings.HasPrefix(mediaType, "audio/")
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play, viable, err := p.renditionParameters(rendition.Play, map[pdfgo.Name]func(pdfgo.Object) bool{
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play, viable, err := codecpdf.RenditionParameters(p.reader, rendition.Play, map[pdfgo.Name]func(pdfgo.Object) bool{
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"V": func(value pdfgo.Object) bool {
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number, ok := value.(pdfgo.Integer)
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return ok && number >= 0 && number <= 100 && (audio || number == 100)
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@@ -231,14 +232,14 @@ func (p *pdfImporter) nativeRendition(rendition *pdfgo.Rendition) (Action, strin
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if err != nil || !viable {
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return result, "", false, err
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}
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screen, viable, err := p.renditionParameters(rendition.Screen, map[pdfgo.Name]func(pdfgo.Object) bool{
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screen, viable, err := codecpdf.RenditionParameters(p.reader, rendition.Screen, map[pdfgo.Name]func(pdfgo.Object) bool{
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"W": func(value pdfgo.Object) bool { return !audio && value == pdfgo.Integer(0) || value == pdfgo.Integer(3) },
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})
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if err != nil || !viable {
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return result, "", false, err
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}
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if screen["W"] == pdfgo.Integer(0) {
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valid, err := p.renditionFloatingWindow(rendition.Screen)
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valid, err := codecpdf.RenditionFloatingWindow(p.reader, rendition.Screen)
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if err != nil || !valid {
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return result, "", false, err
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}
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@@ -258,140 +259,3 @@ func (p *pdfImporter) nativeRendition(rendition *pdfgo.Rendition) (Action, strin
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result.Movie = &Movie{Operator: "Play"}
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return result, "Video", true, nil
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}
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// renditionFloatingWindow 校验浮窗必需的像素尺寸，呈现偏好不写成视频固有尺寸
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// 入参: screen 媒体屏幕参数
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// 返回: bool 是否具备合法尺寸, error 引用错误
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func (p *pdfImporter) renditionFloatingWindow(screen pdfgo.Dictionary) (bool, error) {
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value, err := p.reader.Resolve(screen["BE"])
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if err != nil {
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return false, err
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}
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preferences, _ := value.(pdfgo.Dictionary)
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value, err = p.reader.Resolve(preferences["F"])
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if err != nil {
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return false, err
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}
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window, ok := value.(pdfgo.Dictionary)
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if !ok {
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return false, nil
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}
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value, err = p.reader.Resolve(window["D"])
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if err != nil {
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return false, err
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}
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size, ok := value.(pdfgo.Array)
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if !ok || len(size) != 2 {
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return false, nil
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}
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for _, part := range size {
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value, err = p.reader.Resolve(part)
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if err != nil {
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return false, err
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}
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number, ok := value.(pdfgo.Integer)
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if !ok || number < 0 {
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return false, nil
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}
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}
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return true, nil
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}
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// renditionCriteria 检查媒体环境条件，未知尽力处理字段不影响候选可用性
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// 入参: rendition 媒体呈现或选择器
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// 返回: bool 是否可用, error 条件字典或引用错误
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func (p *pdfImporter) renditionCriteria(rendition *pdfgo.Rendition) (bool, error) {
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for _, constraints := range []struct {
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dict pdfgo.Dictionary
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required bool
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}{{rendition.MustHonor, true}, {rendition.BestEffort, false}} {
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for key, object := range constraints.dict {
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if key != "C" {
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if constraints.required {
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return false, nil
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}
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continue
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}
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value, err := p.reader.Resolve(object)
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if err != nil {
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return false, err
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}
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criteria, ok := value.(pdfgo.Dictionary)
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if !ok {
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return false, fmt.Errorf("invalid media criteria")
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}
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for name, object := range criteria {
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value, err := p.reader.Resolve(object)
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if err != nil {
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return false, err
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}
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if name == "Type" && value == pdfgo.Name("MediaCriteria") {
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continue
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}
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switch name {
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case "Type", "A", "C", "O", "S", "R", "D", "Z", "V", "P", "L":
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return false, nil
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default:
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if constraints.required {
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return false, nil
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}
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}
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}
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}
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}
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return true, nil
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}
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// renditionParameters 合并可等价表达的播放参数，不支持的偏好不阻断播放
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// 入参: dict 参数字典, supported 字段及可表达值的检查
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// 返回: pdfgo.Dictionary 合并后的值, bool 是否可用, error 字典或引用错误
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func (p *pdfImporter) renditionParameters(dict pdfgo.Dictionary, supported map[pdfgo.Name]func(pdfgo.Object) bool) (pdfgo.Dictionary, bool, error) {
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values := make(pdfgo.Dictionary)
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for key := range dict {
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if key != "Type" && key != "MH" && key != "BE" {
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return nil, false, nil
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}
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}
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value, err := p.reader.Resolve(dict["MH"])
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if err != nil {
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return nil, false, err
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}
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mandatory, _ := value.(pdfgo.Dictionary)
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for _, key := range []pdfgo.Name{"BE", "MH"} {
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value, err := p.reader.Resolve(dict[key])
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if err != nil {
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return nil, false, err
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}
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if value == nil {
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continue
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}
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parameters, ok := value.(pdfgo.Dictionary)
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if !ok {
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return nil, false, fmt.Errorf("invalid media playback constraints")
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}
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for name, object := range parameters {
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if _, overridden := mandatory[name]; key == "BE" && overridden {
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continue
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}
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check := supported[name]
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if check == nil {
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if key == "MH" {
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return nil, false, nil
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}
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continue
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}
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resolved, err := p.reader.Resolve(object)
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if err != nil {
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return nil, false, err
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}
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if !check(resolved) {
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if key == "MH" {
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return nil, false, nil
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}
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continue
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}
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values[name] = resolved
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}
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}
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return values, true, nil
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}
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