1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is the Mozilla SVG project.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Crocodile Clips Ltd..
19 : * Portions created by the Initial Developer are Copyright (C) 2001
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Alex Fritze <alex.fritze@crocodile-clips.com> (original author)
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either of the GNU General Public License Version 2 or later (the "GPL"),
27 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
31 : * use your version of this file under the terms of the MPL, indicate your
32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 :
39 : #include "nsSVGInnerSVGFrame.h"
40 : #include "nsIFrame.h"
41 : #include "nsISVGChildFrame.h"
42 : #include "nsIDOMSVGAnimatedRect.h"
43 : #include "nsSVGSVGElement.h"
44 : #include "nsSVGContainerFrame.h"
45 : #include "gfxContext.h"
46 :
47 : nsIFrame*
48 0 : NS_NewSVGInnerSVGFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
49 : {
50 0 : return new (aPresShell) nsSVGInnerSVGFrame(aContext);
51 : }
52 :
53 0 : NS_IMPL_FRAMEARENA_HELPERS(nsSVGInnerSVGFrame)
54 :
55 : //----------------------------------------------------------------------
56 : // nsIFrame methods
57 :
58 0 : NS_QUERYFRAME_HEAD(nsSVGInnerSVGFrame)
59 0 : NS_QUERYFRAME_ENTRY(nsSVGInnerSVGFrame)
60 0 : NS_QUERYFRAME_ENTRY(nsISVGSVGFrame)
61 0 : NS_QUERYFRAME_TAIL_INHERITING(nsSVGInnerSVGFrameBase)
62 :
63 : #ifdef DEBUG
64 : NS_IMETHODIMP
65 0 : nsSVGInnerSVGFrame::Init(nsIContent* aContent,
66 : nsIFrame* aParent,
67 : nsIFrame* aPrevInFlow)
68 : {
69 0 : nsCOMPtr<nsIDOMSVGSVGElement> svg = do_QueryInterface(aContent);
70 0 : NS_ASSERTION(svg, "Content is not an SVG 'svg' element!");
71 :
72 0 : return nsSVGInnerSVGFrameBase::Init(aContent, aParent, aPrevInFlow);
73 : }
74 : #endif /* DEBUG */
75 :
76 : nsIAtom *
77 0 : nsSVGInnerSVGFrame::GetType() const
78 : {
79 0 : return nsGkAtoms::svgInnerSVGFrame;
80 : }
81 :
82 : //----------------------------------------------------------------------
83 : // nsISVGChildFrame methods
84 :
85 : NS_IMETHODIMP
86 0 : nsSVGInnerSVGFrame::PaintSVG(nsRenderingContext *aContext,
87 : const nsIntRect *aDirtyRect)
88 : {
89 0 : gfxContextAutoSaveRestore autoSR;
90 :
91 0 : if (GetStyleDisplay()->IsScrollableOverflow()) {
92 : float x, y, width, height;
93 : static_cast<nsSVGSVGElement*>(mContent)->
94 0 : GetAnimatedLengthValues(&x, &y, &width, &height, nsnull);
95 :
96 0 : if (width <= 0 || height <= 0) {
97 0 : return NS_OK;
98 : }
99 :
100 0 : nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(mParent);
101 0 : gfxMatrix clipTransform = parent->GetCanvasTM();
102 :
103 0 : gfxContext *gfx = aContext->ThebesContext();
104 0 : autoSR.SetContext(gfx);
105 : gfxRect clipRect =
106 0 : nsSVGUtils::GetClipRectForFrame(this, x, y, width, height);
107 0 : nsSVGUtils::SetClipRect(gfx, clipTransform, clipRect);
108 : }
109 :
110 0 : return nsSVGInnerSVGFrameBase::PaintSVG(aContext, aDirtyRect);
111 : }
112 :
113 : void
114 0 : nsSVGInnerSVGFrame::NotifySVGChanged(PRUint32 aFlags)
115 : {
116 0 : NS_ABORT_IF_FALSE(!(aFlags & DO_NOT_NOTIFY_RENDERING_OBSERVERS) ||
117 : (GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD),
118 : "Must be NS_STATE_SVG_NONDISPLAY_CHILD!");
119 :
120 0 : NS_ABORT_IF_FALSE(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
121 : "Invalidation logic may need adjusting");
122 :
123 0 : if (aFlags & COORD_CONTEXT_CHANGED) {
124 :
125 0 : nsSVGSVGElement *svg = static_cast<nsSVGSVGElement*>(mContent);
126 :
127 : // Coordinate context changes affect mCanvasTM if we have a
128 : // percentage 'x' or 'y', or if we have a percentage 'width' or 'height' AND
129 : // a 'viewBox'.
130 :
131 0 : if (!(aFlags & TRANSFORM_CHANGED) &&
132 0 : (svg->mLengthAttributes[nsSVGSVGElement::X].IsPercentage() ||
133 0 : svg->mLengthAttributes[nsSVGSVGElement::Y].IsPercentage() ||
134 0 : (svg->mViewBox.IsValid() &&
135 0 : (svg->mLengthAttributes[nsSVGSVGElement::WIDTH].IsPercentage() ||
136 0 : svg->mLengthAttributes[nsSVGSVGElement::HEIGHT].IsPercentage())))) {
137 :
138 0 : aFlags |= TRANSFORM_CHANGED;
139 : }
140 :
141 : // XXX We could clear the COORD_CONTEXT_CHANGED flag in some circumstances
142 : // if we have a non-percentage 'width' AND 'height, or if we have a 'viewBox'
143 : // rect. This is because, when we have a viewBox rect, the viewBox rect
144 : // is the coordinate context for our children, and it isn't changing.
145 : // Percentage lengths on our children will continue to resolve to the
146 : // same number of user units because they're relative to our viewBox rect. The
147 : // same is true if we have a non-percentage width and height and don't have a
148 : // viewBox. We (the <svg>) establish the coordinate context for our children. Our
149 : // children don't care about changes to our parent coordinate context unless that
150 : // change results in a change to the coordinate context that _we_ establish. Hence
151 : // we can (should, really) stop propagating COORD_CONTEXT_CHANGED in these cases.
152 : // We'd actually need to check that we have a viewBox rect and not just
153 : // that viewBox is set, since it could be set to none.
154 : // Take care not to break the testcase for bug 394463 when implementing this
155 : }
156 :
157 0 : if (aFlags & TRANSFORM_CHANGED) {
158 : // make sure our cached transform matrix gets (lazily) updated
159 0 : mCanvasTM = nsnull;
160 : }
161 :
162 0 : nsSVGInnerSVGFrameBase::NotifySVGChanged(aFlags);
163 0 : }
164 :
165 : NS_IMETHODIMP
166 0 : nsSVGInnerSVGFrame::AttributeChanged(PRInt32 aNameSpaceID,
167 : nsIAtom* aAttribute,
168 : PRInt32 aModType)
169 : {
170 0 : if (aNameSpaceID == kNameSpaceID_None) {
171 0 : if (aAttribute == nsGkAtoms::width ||
172 : aAttribute == nsGkAtoms::height) {
173 :
174 0 : nsSVGSVGElement* svg = static_cast<nsSVGSVGElement*>(mContent);
175 0 : if (svg->mViewBox.IsValid()) {
176 :
177 : // make sure our cached transform matrix gets (lazily) updated
178 0 : mCanvasTM = nsnull;
179 :
180 0 : nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
181 : } else {
182 :
183 0 : PRUint32 flags = COORD_CONTEXT_CHANGED;
184 :
185 0 : if (mCanvasTM && mCanvasTM->IsSingular()) {
186 :
187 0 : mCanvasTM = nsnull;
188 :
189 0 : flags |= TRANSFORM_CHANGED;
190 : }
191 0 : nsSVGUtils::NotifyChildrenOfSVGChange(this, flags);
192 0 : }
193 :
194 0 : } else if (aAttribute == nsGkAtoms::transform ||
195 : aAttribute == nsGkAtoms::preserveAspectRatio ||
196 : aAttribute == nsGkAtoms::viewBox ||
197 : aAttribute == nsGkAtoms::x ||
198 : aAttribute == nsGkAtoms::y) {
199 : // make sure our cached transform matrix gets (lazily) updated
200 0 : mCanvasTM = nsnull;
201 :
202 : nsSVGUtils::NotifyChildrenOfSVGChange(
203 : this, aAttribute == nsGkAtoms::viewBox ?
204 0 : TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED : TRANSFORM_CHANGED);
205 : }
206 : }
207 :
208 0 : return NS_OK;
209 : }
210 :
211 : NS_IMETHODIMP_(nsIFrame*)
212 0 : nsSVGInnerSVGFrame::GetFrameForPoint(const nsPoint &aPoint)
213 : {
214 0 : if (GetStyleDisplay()->IsScrollableOverflow()) {
215 0 : nsSVGElement *content = static_cast<nsSVGElement*>(mContent);
216 0 : nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(mParent);
217 :
218 : float clipX, clipY, clipWidth, clipHeight;
219 0 : content->GetAnimatedLengthValues(&clipX, &clipY, &clipWidth, &clipHeight, nsnull);
220 :
221 0 : if (!nsSVGUtils::HitTestRect(parent->GetCanvasTM(),
222 : clipX, clipY, clipWidth, clipHeight,
223 0 : PresContext()->AppUnitsToDevPixels(aPoint.x),
224 0 : PresContext()->AppUnitsToDevPixels(aPoint.y))) {
225 0 : return nsnull;
226 : }
227 : }
228 :
229 0 : return nsSVGInnerSVGFrameBase::GetFrameForPoint(aPoint);
230 : }
231 :
232 : //----------------------------------------------------------------------
233 : // nsISVGSVGFrame methods:
234 :
235 : void
236 0 : nsSVGInnerSVGFrame::SuspendRedraw()
237 : {
238 0 : if (GetParent()->GetStateBits() & NS_STATE_SVG_REDRAW_SUSPENDED)
239 0 : return;
240 :
241 0 : nsSVGUtils::NotifyRedrawSuspended(this);
242 : }
243 :
244 : void
245 0 : nsSVGInnerSVGFrame::UnsuspendRedraw()
246 : {
247 0 : if (GetParent()->GetStateBits() & NS_STATE_SVG_REDRAW_SUSPENDED)
248 0 : return;
249 :
250 0 : nsSVGUtils::NotifyRedrawUnsuspended(this);
251 : }
252 :
253 : void
254 0 : nsSVGInnerSVGFrame::NotifyViewportChange()
255 : {
256 0 : NS_ERROR("Inner SVG frames should not get Viewport changes.");
257 0 : }
258 :
259 : //----------------------------------------------------------------------
260 : // nsSVGContainerFrame methods:
261 :
262 : gfxMatrix
263 0 : nsSVGInnerSVGFrame::GetCanvasTM()
264 : {
265 0 : if (!mCanvasTM) {
266 0 : NS_ASSERTION(mParent, "null parent");
267 :
268 0 : nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(mParent);
269 0 : nsSVGSVGElement *content = static_cast<nsSVGSVGElement*>(mContent);
270 :
271 0 : gfxMatrix tm = content->PrependLocalTransformsTo(parent->GetCanvasTM());
272 :
273 0 : mCanvasTM = new gfxMatrix(tm);
274 : }
275 0 : return *mCanvasTM;
276 : }
277 :
|