1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8 #include "SkViewInflate.h"
9 #include "SkView.h"
10 #include <stdio.h>
11
SkViewInflate()12 SkViewInflate::SkViewInflate() : fIDs(kMinIDStrAlloc), fStrings(kMinIDStrAlloc)
13 {
14 }
15
~SkViewInflate()16 SkViewInflate::~SkViewInflate()
17 {
18 }
19
rInflate(const SkDOM & dom,const SkDOM::Node * node,SkView * parent)20 void SkViewInflate::rInflate(const SkDOM& dom, const SkDOM::Node* node, SkView* parent)
21 {
22 const char* str = dom.findAttr(node, "id");
23 if (str)
24 fIDs.set(str, parent);
25
26 const SkDOM::Node* child = dom.getFirstChild(node);
27 while (child)
28 {
29 SkView* view = this->createView(dom, child);
30 if (view)
31 {
32 this->rInflate(dom, child, view);
33 parent->attachChildToFront(view)->unref();
34 }
35 else
36 {
37 const char* name = dom.getName(child);
38 const char* target;
39
40 if (!strcmp(name, "listenTo") && (target = dom.findAttr(child, "target")) != NULL)
41 this->addIDStr(&fListenTo, parent, target);
42
43 if (!strcmp(name, "broadcastTo") && (target = dom.findAttr(child, "target")) != NULL)
44 this->addIDStr(&fBroadcastTo, parent, target);
45 }
46 child = dom.getNextSibling(child);
47 }
48
49 parent->setVisibleP(true);
50 this->inflateView(parent, dom, node);
51 }
52
inflateView(SkView * view,const SkDOM & dom,const SkDOM::Node * node)53 void SkViewInflate::inflateView(SkView* view, const SkDOM& dom, const SkDOM::Node* node)
54 {
55 // called after all of view's children have been instantiated.
56 // this may be overridden by a subclass, to load in layout or other helpers
57 // they should call through to us (INHERITED) before or after their patch
58 view->inflate(dom, node);
59 }
60
inflate(const SkDOM & dom,const SkDOM::Node * node,SkView * root)61 SkView* SkViewInflate::inflate(const SkDOM& dom, const SkDOM::Node* node, SkView* root)
62 {
63 fIDs.reset();
64
65 if (root == NULL)
66 {
67 root = this->createView(dom, node);
68 if (root == NULL)
69 {
70 printf("createView returned NULL on <%s>\n", dom.getName(node));
71 return NULL;
72 }
73 }
74 this->rInflate(dom, node, root);
75
76 // resolve listeners and broadcasters
77 {
78 SkView* target;
79 const IDStr* iter = fListenTo.begin();
80 const IDStr* stop = fListenTo.end();
81 for (; iter < stop; iter++)
82 {
83 if (fIDs.find(iter->fStr, &target))
84 target->addListenerID(iter->fView->getSinkID());
85 }
86
87 iter = fBroadcastTo.begin();
88 stop = fBroadcastTo.end();
89 for (; iter < stop; iter++)
90 {
91 if (fIDs.find(iter->fStr, &target))
92 iter->fView->addListenerID(target->getSinkID());
93 }
94 }
95
96 // now that the tree is built, give everyone a shot at the ID dict
97 root->postInflate(fIDs);
98 return root;
99 }
100
inflate(const char xml[],size_t len,SkView * root)101 SkView* SkViewInflate::inflate(const char xml[], size_t len, SkView* root)
102 {
103 SkDOM dom;
104 const SkDOM::Node* node = dom.build(xml, len);
105
106 return node ? this->inflate(dom, node, root) : NULL;
107 }
108
findViewByID(const char id[]) const109 SkView* SkViewInflate::findViewByID(const char id[]) const
110 {
111 SkASSERT(id);
112 SkView* view;
113 return fIDs.find(id, &view) ? view : NULL;
114 }
115
createView(const SkDOM & dom,const SkDOM::Node * node)116 SkView* SkViewInflate::createView(const SkDOM& dom, const SkDOM::Node* node)
117 {
118 if (!strcmp(dom.getName(node), "view"))
119 return new SkView;
120 return NULL;
121 }
122
addIDStr(SkTDArray<IDStr> * list,SkView * view,const char * str)123 void SkViewInflate::addIDStr(SkTDArray<IDStr>* list, SkView* view, const char* str)
124 {
125 size_t len = strlen(str) + 1;
126 IDStr* pair = list->append();
127 pair->fView = view;
128 pair->fStr = (char*)fStrings.alloc(len, SkChunkAlloc::kThrow_AllocFailType);
129 memcpy(pair->fStr, str, len);
130 }
131
132 #ifdef SK_DEBUG
dump() const133 void SkViewInflate::dump() const
134 {
135 const IDStr* iter = fListenTo.begin();
136 const IDStr* stop = fListenTo.end();
137 for (; iter < stop; iter++)
138 SkDebugf("inflate: listenTo(\"%s\")\n", iter->fStr);
139
140 iter = fBroadcastTo.begin();
141 stop = fBroadcastTo.end();
142 for (; iter < stop; iter++)
143 SkDebugf("inflate: broadcastFrom(\"%s\")\n", iter->fStr);
144 }
145 #endif
146