func ElseIfFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
condition, err := p.ReadConditionGroup()
if err != nil {
return nil, err
}
p.SkipPastTag()
return &ElseIf{NewCommon(), condition}, nil
}
func WhenFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
condition, err := p.ReadPartialCondition()
if err != nil {
return nil, err
}
p.SkipPastTag()
return &When{NewCommon(), condition}, nil
}
func CaseFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
value, err := p.ReadValue()
if err != nil {
return nil, err
}
p.SkipPastTag()
return &Case{value, make([]CaseSibling, 0, 5)}, nil
}
func UnlessFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
condition, err := p.ReadConditionGroup()
if err != nil {
return nil, err
}
p.SkipPastTag()
condition.Inverse()
return &Unless{NewCommon(), condition, nil}, nil
}
func newTag(p *core.Parser, config *core.Configuration) (core.Tag, error) {
p.ForwardBy(2) // skip the {%
name := p.ReadName()
factory, ok := Tags[name]
if ok == false {
return nil, nil
//return nil, p.Error(fmt.Sprintf("unknown tag %q", name))
}
return factory(p, config)
}
func IfFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
condition, err := p.ReadConditionGroup()
if err != nil {
return nil, err
}
i := &If{
NewCommon(),
condition,
make([]IfSibling, 0, 3),
}
i.conditions = append(i.conditions, i)
p.SkipPastTag()
return i, nil
}
func newOutput(p *core.Parser) (core.Code, error) {
p.ForwardBy(2) // skip the {{
value, err := p.ReadValue()
if err != nil || value == nil {
return nil, err
}
filters, err := p.ReadFilters()
if err != nil {
return nil, err
}
p.SkipPastOutput()
return &Output{value, filters}, nil
}
func extractTokens(parser *core.Parser, container core.Tag, config *core.Configuration) error {
stack := []core.Tag{container}
preserveWhiteSpace := config.GetPreserveWhitespace()
for parser.HasMore() {
pre, markupType := parser.ToMarkup(preserveWhiteSpace)
if len(pre) > 0 {
container.AddCode(newLiteral(pre))
}
if markupType == core.OutputMarkup {
code, err := newOutput(parser)
if err != nil {
return err
}
if code != nil {
container.AddCode(code)
}
} else if markupType == core.TagMarkup {
tag, err := newTag(parser, config)
if err != nil {
return err
}
switch tag.Type() {
case core.ContainerTag, core.LoopTag:
container.AddCode(tag)
container = tag
stack = append(stack, container)
case core.EndTag:
l := len(stack) - 1
container = stack[l]
if tag.Name() != container.Name() {
return parser.Error(fmt.Sprintf("end tag \"end%s\" cannot terminate %q", tag.Name(), container.Name()))
}
stack = stack[0:l]
container = stack[l-1]
parser.SkipPastTag()
case core.SiblingTag:
if err := stack[len(stack)-1].AddSibling(tag); err != nil {
return err
}
container = tag
case core.StandaloneTag:
container.AddCode(tag)
}
} else {
break
}
}
return nil
}
// Creates an assign tag
func CaptureFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
name := p.ReadName()
if len(name) == 0 {
return nil, p.Error("Invalid assignment, variable not found. ")
}
p.SkipPastTag()
return &Capture{name, NewCommon()}, nil
}
// Special handling to just quickly skip over it all
func HighlightFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
openTags := 1
for {
_, markupType := p.ToMarkup(false)
if markupType == core.TagMarkup {
p.ForwardBy(2) // skip {%
if name := p.ReadName(); name == "highlight" {
openTags++
} else if name == "endhighlight" {
openTags--
if openTags == 0 {
p.SkipPastTag()
break
}
}
} else if markupType == core.OutputMarkup {
p.SkipPastTag()
} else {
break
}
}
return highlight, nil
}
// Creates an include tag
func IncludeFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
value, err := p.ReadValue()
if err != nil {
return nil, err
}
if value == nil {
return nil, p.Error("Invalid include value")
}
p.SkipPastTag()
return &Include{value, config.GetIncludeHandler()}, nil
}
func ElseFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
p.SkipPastTag()
return &Else{NewCommon(), new(core.TrueCondition)}, nil
}
// Creates an assign tag
func AssignFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
name := p.ReadName()
if len(name) == 0 {
return nil, p.Error("Invalid variable name in assign tag")
}
if p.SkipUntil('=') != '=' {
return nil, p.Error("Invalid assign, missing '=' ")
}
p.Forward()
value, err := p.ReadValue()
if err != nil {
return nil, err
}
filters, err := p.ReadFilters()
if err != nil {
return nil, err
}
p.SkipPastTag()
return &Assign{name, value, filters}, nil
}
// Creates a break tag
func BreakFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
p.SkipPastTag()
return breakTag, nil
}
// Creates a continue tag
func ContinueFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
p.SkipPastTag()
return continueTag, nil
}
// Special handling to just quickly skip over it all
func RawFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
p.SkipPastTag()
start := p.Position
end := start
for {
_, markupType := p.ToMarkup(false)
if markupType == core.TagMarkup {
//tentative end is before the start of the endraw tag
end = p.Position
p.ForwardBy(2) // skip {%
if name := p.ReadName(); name == "endraw" {
p.SkipPastTag()
break
}
} else if markupType == core.OutputMarkup {
p.ForwardBy(2) // skip it
} else {
break
}
}
return &Raw{p.Data[start:end]}, nil
}
func ForFactory(p *core.Parser, config *core.Configuration) (core.Tag, error) {
name := p.ReadName()
if len(name) == 0 {
return nil, p.Error("Invalid variable name in for tag")
}
if p.SkipSpaces() != 'i' || p.Left() < 3 || p.Data[p.Position+1] != 'n' || !core.IsTokenEnd(p.Data[p.Position+2]) {
return nil, p.Error("Expecting keyword 'in' after variable name in for tag")
}
p.ForwardBy(2)
value, err := p.ReadValue()
if err != nil {
return nil, err
}
f := &For{
Common: NewCommon(),
name: name,
keyName: name + "[0]",
valueName: name + "[1]",
value: value,
}
for {
name := p.ReadName()
if name == "" {
break
}
if name == "limit" {
if p.SkipUntil(':') != ':' {
return nil, p.Error("Expecting ':' after limit in for tag")
}
p.Forward()
limit, err := p.ReadValue()
if err != nil {
return nil, err
}
f.limit = limit
} else if name == "offset" {
if p.SkipUntil(':') != ':' {
return nil, p.Error("Expecting ':' after offset in for tag")
}
p.Forward()
offset, err := p.ReadValue()
if err != nil {
return nil, err
}
f.offset = offset
} else if name == "reverse" {
f.reverse = true
} else {
return nil, p.Error(fmt.Sprint("%q is an inknown modifier in for tag", name))
}
}
p.SkipPastTag()
return f, nil
}