samplecode/SampleSVGFile.cpp

   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 "SampleCode.h"
   9 #include "SkCanvas.h"
  10 #include "SkDOM.h"
  11 #include "SkOSFile.h"
  12 #include "SkOSPath.h"
  13 #include "SkStream.h"
  14 #include "SkSVGDOM.h"
  15 #include "SkView.h"
  16
  17 namespace {
  18
  19 class SVGFileView : public SampleView {
  20 public:
  21     SVGFileView(const SkString& path)
  22         : fPath(path), fLabel(SkStringPrintf("[%s]", SkOSPath::Basename(path.c_str()).c_str())) {}
  23     ~SVGFileView() override = default;
  24
  25 protected:
  26     void onOnceBeforeDraw() override {
  27         SkFILEStream svgStream(fPath.c_str());
  28         if (!svgStream.isValid()) {
  29             SkDebugf("file not found: \"path\"\n", fPath.c_str());
  30             return;
  31         }
  32
  33         SkDOM xmlDom;
  34         if (!xmlDom.build(svgStream)) {
  35             SkDebugf("XML parsing failed: \"path\"\n", fPath.c_str());
  36             return;
  37         }
  38
  39         fDom = SkSVGDOM::MakeFromDOM(xmlDom);
  40         if (fDom) {
  41             fDom->setContainerSize(SkSize::Make(this->width(), this->height()));
  42         }
  43     }
  44
  45     void onDrawContent(SkCanvas* canvas) override {
  46         if (fDom) {
  47             fDom->render(canvas);
  48         }
  49     }
  50
  51     void onSizeChange() override {
  52         if (fDom) {
  53             fDom->setContainerSize(SkSize::Make(this->width(), this->height()));
  54         }
  55
  56         this->INHERITED::onSizeChange();
  57     }
  58
  59     bool onQuery(SkEvent* evt) override {
  60         if (SampleCode::TitleQ(*evt)) {
  61             SampleCode::TitleR(evt, fLabel.c_str());
  62             return true;
  63         }
  64
  65         return this->INHERITED::onQuery(evt);
  66     }
  67 private:
  68     sk_sp<SkSVGDOM> fDom;
  69     SkString        fPath;
  70     SkString        fLabel;
  71
  72     typedef SampleView INHERITED;
  73 };
  74
  75 } // anonymous namespace
  76
  77 SampleView* CreateSampleSVGFileView(const SkString& filename);
  78 SampleView* CreateSampleSVGFileView(const SkString& filename) {
  79     return new SVGFileView(filename);
  80 }