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      1 /*
      2  * Copyright 2016 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "GrAuditTrail.h"
      9 
     10 void GrAuditTrail::JsonifyTArray(SkString* json, const char* name, const FrameArray& array,
     11                                  bool addComma) {
     12     if (array.count()) {
     13         if (addComma) {
     14             json->appendf(",");
     15         }
     16         json->appendf("\"%s\": [", name);
     17         for (int i = 0; i < array.count(); i++) {
     18             json->append(array[i]->toJson());
     19             if (i < array.count() - 1) {
     20                 json->append(",");
     21             }
     22         }
     23         json->append("]");
     24     }
     25 }
     26 
     27 // This will pretty print a very small subset of json
     28 // The parsing rules are straightforward, aside from the fact that we do not want an extra newline
     29 // before ',' and after '}', so we have a comma exception rule.
     30 class PrettyPrintJson {
     31 public:
     32     SkString prettify(const SkString& json) {
     33         fPrettyJson.reset();
     34         fTabCount = 0;
     35         fFreshLine = false;
     36         fCommaException = false;
     37         for (size_t i = 0; i < json.size(); i++) {
     38             if ('[' == json[i] || '{' == json[i]) {
     39                 this->newline();
     40                 this->appendChar(json[i]);
     41                 fTabCount++;
     42                 this->newline();
     43             } else if (']' == json[i] || '}' == json[i]) {
     44                 fTabCount--;
     45                 this->newline();
     46                 this->appendChar(json[i]);
     47                 fCommaException = true;
     48             } else if (',' == json[i]) {
     49                 this->appendChar(json[i]);
     50                 this->newline();
     51             } else {
     52                 this->appendChar(json[i]);
     53             }
     54         }
     55         return fPrettyJson;
     56     }
     57 private:
     58     void appendChar(char appendee) {
     59         if (fCommaException && ',' != appendee) {
     60             this->newline();
     61         }
     62         this->tab();
     63         fPrettyJson += appendee;
     64         fFreshLine = false;
     65         fCommaException = false;
     66     }
     67 
     68     void tab() {
     69         if (fFreshLine) {
     70             for (int i = 0; i < fTabCount; i++) {
     71                 fPrettyJson += '\t';
     72             }
     73         }
     74     }
     75 
     76     void newline() {
     77         if (!fFreshLine) {
     78             fFreshLine = true;
     79             fPrettyJson += '\n';
     80         }
     81     }
     82 
     83     SkString fPrettyJson;
     84     int fTabCount;
     85     bool fFreshLine;
     86     bool fCommaException;
     87 };
     88 
     89 static SkString pretty_print_json(SkString json) {
     90     class PrettyPrintJson prettyPrintJson;
     91     return prettyPrintJson.prettify(json);
     92 }
     93 
     94 SkString GrAuditTrail::toJson(bool prettyPrint) const {
     95     SkString json;
     96     json.append("{");
     97     JsonifyTArray(&json, "Stacks", fFrames, false);
     98     json.append("}");
     99 
    100     if (prettyPrint) {
    101         return pretty_print_json(json);
    102     } else {
    103         return json;
    104     }
    105 }
    106 
    107 SkString GrAuditTrail::Frame::toJson() const {
    108     SkString json;
    109     json.append("{");
    110     json.appendf("\"Name\": \"%s\"", fName);
    111     JsonifyTArray(&json, "Frames", fChildren, true);
    112     json.append("}");
    113     return json;
    114 }
    115 
    116 SkString GrAuditTrail::Batch::toJson() const {
    117     SkString json;
    118     json.append("{");
    119     json.appendf("\"Name\": \"%s\",", fName);
    120     json.append("\"Bounds\": {");
    121     json.appendf("\"Left\": %f,", fBounds.fLeft);
    122     json.appendf("\"Right\": %f,", fBounds.fRight);
    123     json.appendf("\"Top\": %f,", fBounds.fTop);
    124     json.appendf("\"Bottom\": %f", fBounds.fBottom);
    125     json.append("}");
    126     json.append("}");
    127     return json;
    128 }
    129