michael@0: /*
michael@0:  * Copyright 2013 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #include "SkDocument.h"
michael@0: #include "SkStream.h"
michael@0: 
michael@0: SkDocument::SkDocument(SkWStream* stream, void (*doneProc)(SkWStream*, bool)) {
michael@0:     fStream = stream;   // we do not own this object.
michael@0:     fDoneProc = doneProc;
michael@0:     fState = kBetweenPages_State;
michael@0: }
michael@0: 
michael@0: SkDocument::~SkDocument() {
michael@0:     this->close();
michael@0: }
michael@0: 
michael@0: SkCanvas* SkDocument::beginPage(SkScalar width, SkScalar height,
michael@0:                                 const SkRect* content) {
michael@0:     if (width <= 0 || height <= 0) {
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     SkRect outer = SkRect::MakeWH(width, height);
michael@0:     SkRect inner;
michael@0:     if (content) {
michael@0:         inner = *content;
michael@0:         if (!inner.intersect(outer)) {
michael@0:             return NULL;
michael@0:         }
michael@0:     } else {
michael@0:         inner = outer;
michael@0:     }
michael@0: 
michael@0:     for (;;) {
michael@0:         switch (fState) {
michael@0:             case kBetweenPages_State:
michael@0:                 fState = kInPage_State;
michael@0:                 return this->onBeginPage(width, height, inner);
michael@0:             case kInPage_State:
michael@0:                 this->endPage();
michael@0:                 break;
michael@0:             case kClosed_State:
michael@0:                 return NULL;
michael@0:         }
michael@0:     }
michael@0:     SkDEBUGFAIL("never get here");
michael@0:     return NULL;
michael@0: }
michael@0: 
michael@0: void SkDocument::endPage() {
michael@0:     if (kInPage_State == fState) {
michael@0:         fState = kBetweenPages_State;
michael@0:         this->onEndPage();
michael@0:     }
michael@0: }
michael@0: 
michael@0: bool SkDocument::close() {
michael@0:     for (;;) {
michael@0:         switch (fState) {
michael@0:             case kBetweenPages_State: {
michael@0:                 fState = kClosed_State;
michael@0:                 bool success = this->onClose(fStream);
michael@0: 
michael@0:                 if (fDoneProc) {
michael@0:                     fDoneProc(fStream, false);
michael@0:                 }
michael@0:                 // we don't own the stream, but we mark it NULL since we can
michael@0:                 // no longer write to it.
michael@0:                 fStream = NULL;
michael@0:                 return success;
michael@0:             }
michael@0:             case kInPage_State:
michael@0:                 this->endPage();
michael@0:                 break;
michael@0:             case kClosed_State:
michael@0:                 return false;
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: void SkDocument::abort() {
michael@0:     this->onAbort();
michael@0: 
michael@0:     fState = kClosed_State;
michael@0:     if (fDoneProc) {
michael@0:         fDoneProc(fStream, true);
michael@0:     }
michael@0:     // we don't own the stream, but we mark it NULL since we can
michael@0:     // no longer write to it.
michael@0:     fStream = NULL;
michael@0: }