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tdelibs/tdehtml/rendering/render_image.cpp

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/**
* This file is part of the DOM implementation for KDE.
*
* Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2000-2003 Dirk Mueller (mueller@kde.org)
* (C) 2003 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
//#define DEBUG_LAYOUT
#include "render_image.h"
#include "render_canvas.h"
#include <tqdrawutil.h>
#include <tqpainter.h>
#include <tdeapplication.h>
#include <kdebug.h>
#include <tdeglobalsettings.h>
#include "css/csshelper.h"
#include "misc/helper.h"
#include "misc/htmlattrs.h"
#include "misc/loader.h"
#include "misc/svgrender.h"
#include "misc/htmltags.h"
#include "html/html_formimpl.h"
#include "html/html_imageimpl.h"
#include "html/dtd.h"
#include "xml/dom2_eventsimpl.h"
#include "html/html_documentimpl.h"
#include "html/html_objectimpl.h"
#include "tdehtmlview.h"
#include "tdehtml_part.h"
#include <math.h>
#include "loading_icon.cpp"
using namespace DOM;
using namespace tdehtml;
// -------------------------------------------------------------------------
RenderImage::RenderImage(NodeImpl *_element)
: RenderReplaced(_element)
{
m_oldImage = m_cachedImage = 0;
m_selectionState = SelectionNone;
berrorPic = false;
const TDEHTMLSettings *settings = _element->getDocument()->view()->part()->settings();
bUnfinishedImageFrame = settings->unfinishedImageFrame();
setIntrinsicWidth( 0 );
setIntrinsicHeight( 0 );
}
RenderImage::~RenderImage()
{
if(m_cachedImage) m_cachedImage->deref( this );
if(m_oldImage) m_oldImage->deref( this );
}
TQPixmap RenderImage::pixmap() const
{
return m_cachedImage ? m_cachedImage->pixmap() : TQPixmap();
}
void RenderImage::setStyle(RenderStyle* _style)
{
RenderReplaced::setStyle(_style);
// init RenderObject attributes
//setOverhangingContents(style()->height().isPercent());
setShouldPaintBackgroundOrBorder(true);
}
void RenderImage::setContentObject(CachedObject* co )
{
if (co && m_cachedImage != co)
updateImage( static_cast<CachedImage*>( co ) );
}
void RenderImage::setPixmap( const TQPixmap &p, const TQRect& r, CachedImage *o)
{
if ( o == m_oldImage )
return;
if(o != m_cachedImage) {
RenderReplaced::setPixmap(p, r, o);
return;
}
bool iwchanged = false;
if(o->isErrorImage()) {
int iw = p.width() + 8;
int ih = p.height() + 8;
// we have an alt and the user meant it (its not a text we invented)
if ( element() && !alt.isEmpty() && !element()->getAttribute( ATTR_ALT ).isNull()) {
const TQFontMetrics &fm = style()->fontMetrics();
TQRect br = fm.boundingRect ( 0, 0, 1024, 256, TQt::AlignAuto|TQt::WordBreak, alt.string() );
if ( br.width() > iw )
iw = br.width();
if ( br.height() > ih )
ih = br.height();
}
if ( iw != intrinsicWidth() ) {
setIntrinsicWidth( iw );
iwchanged = true;
}
if ( ih != intrinsicHeight() ) {
setIntrinsicHeight( ih );
iwchanged = true;
}
if ( element() && element()->id() == ID_OBJECT ) {
static_cast<HTMLObjectElementImpl*>( element() )->renderAlternative();
return;
}
}
berrorPic = o->isErrorImage();
bool needlayout = false;
// Image dimensions have been changed, see what needs to be done
if( o->pixmap_size().width() != intrinsicWidth() ||
o->pixmap_size().height() != intrinsicHeight() || iwchanged )
{
// tqDebug("image dimensions have been changed, old: %d/%d new: %d/%d",
// intrinsicWidth(), intrinsicHeight(),
// o->pixmap_size().width(), o->pixmap_size().height());
if(!o->isErrorImage()) {
setIntrinsicWidth( o->pixmap_size().width() );
setIntrinsicHeight( o->pixmap_size().height() );
}
// lets see if we need to relayout at all..
int oldwidth = m_width;
int oldheight = m_height;
int oldminwidth = m_minWidth;
m_minWidth = 0;
if ( parent() ) {
calcWidth();
calcHeight();
}
if(iwchanged || m_width != oldwidth || m_height != oldheight)
needlayout = true;
m_minWidth = oldminwidth;
m_width = oldwidth;
m_height = oldheight;
}
// we're not fully integrated in the tree yet.. we'll come back.
if ( !parent() )
return;
if(needlayout)
{
if (!selfNeedsLayout())
setNeedsLayout(true);
if (minMaxKnown())
setMinMaxKnown(false);
}
else
{
bool completeRepaint = !resizeCache.isNull();
int cHeight = contentHeight();
int scaledHeight = intrinsicHeight() ? ((o->valid_rect().height()*cHeight)/intrinsicHeight()) : 0;
// don't bog down X server doing xforms
if(completeRepaint && cHeight >= 5 && o->valid_rect().height() < intrinsicHeight() &&
(scaledHeight / (cHeight/5) == resizeCache.height() / (cHeight/5)))
return;
resizeCache = TQPixmap(); // for resized animations
if(completeRepaint)
repaintRectangle(borderLeft()+paddingLeft(), borderTop()+paddingTop(), contentWidth(), contentHeight());
else
{
repaintRectangle(r.x() + borderLeft() + paddingLeft(), r.y() + borderTop() + paddingTop(),
r.width(), r.height());
}
}
}
void RenderImage::paint(PaintInfo& paintInfo, int _tx, int _ty)
{
if (paintInfo.phase == PaintActionOutline && style()->outlineWidth() && style()->visibility() == VISIBLE)
paintOutline(paintInfo.p, _tx + m_x, _ty + m_y, width(), height(), style());
if (paintInfo.phase != PaintActionForeground && paintInfo.phase != PaintActionSelection)
return;
// not visible or not even once layouted?
if (style()->visibility() != VISIBLE || m_y <= -500000) return;
_tx += m_x;
_ty += m_y;
if((_ty > paintInfo.r.bottom()) || (_ty + m_height <= paintInfo.r.top())) return;
if(shouldPaintBackgroundOrBorder())
paintBoxDecorations(paintInfo, _tx, _ty);
int cWidth = contentWidth();
int cHeight = contentHeight();
int leftBorder = borderLeft();
int topBorder = borderTop();
int leftPad = paddingLeft();
int topPad = paddingTop();
if (!canvas()->printImages())
return;
CachedImage* i = m_oldImage && m_oldImage->valid_rect().size() == m_oldImage->pixmap_size() &&
m_oldImage->pixmap_size().width() == intrinsicWidth() &&
m_oldImage->pixmap_size().height() == intrinsicHeight()
? m_oldImage : m_cachedImage;
// paint frame around image as long as it is not completely loaded from web.
if (bUnfinishedImageFrame && paintInfo.phase == PaintActionForeground && cWidth > 2 && cHeight > 2 && !complete() && !(i && i->isVectorImage())) {
static TQPixmap *loadingIcon;
TQColor bg = tdehtml::retrieveBackgroundColor(this);
TQColor fg = tdehtml::hasSufficientContrast(Qt::gray, bg) ? Qt::gray :
(hasSufficientContrast(Qt::white, bg) ? Qt::white : Qt::black);
paintInfo.p->setPen(TQPen(fg, 1));
paintInfo.p->setBrush( Qt::NoBrush );
paintInfo.p->drawRect(_tx, _ty, m_width, m_height);
if (!(m_width <= 5 || m_height <= 5)) {
if (!loadingIcon) {
loadingIcon = new TQPixmap();
loadingIcon->loadFromData(loading_icon_data, loading_icon_len);
}
paintInfo.p->drawPixmap(_tx + 4, _ty + 4, *loadingIcon, 0, 0, m_width - 5, m_height - 5);
}
}
//kdDebug( 6040 ) << " contents (" << contentWidth << "/" << contentHeight << ") border=" << borderLeft() << " padding=" << paddingLeft() << endl;
if ( !i || berrorPic)
{
if(cWidth > 2 && cHeight > 2)
{
if ( !berrorPic ) {
//tqDebug("qDrawShadePanel %d/%d/%d/%d", _tx + leftBorder, _ty + topBorder, cWidth, cHeight);
qDrawShadePanel( paintInfo.p, _tx + leftBorder + leftPad, _ty + topBorder + topPad, cWidth, cHeight,
TDEApplication::palette().inactive(), true, 1 );
}
TQPixmap const* pix = i ? &i->pixmap() : 0;
if(berrorPic && pix && (cWidth >= pix->width()+4) && (cHeight >= pix->height()+4) )
{
TQRect r(pix->rect());
r = r.intersect(TQRect(0, 0, cWidth-4, cHeight-4));
paintInfo.p->drawPixmap( TQPoint( _tx + leftBorder + leftPad+2, _ty + topBorder + topPad+2), *pix, r );
}
if(!alt.isEmpty()) {
TQString text = alt.string();
paintInfo.p->setFont(style()->font());
paintInfo.p->setPen( style()->color() );
int ax = _tx + leftBorder + leftPad + 2;
int ay = _ty + topBorder + topPad + 2;
const TQFontMetrics &fm = style()->fontMetrics();
if (cWidth>5 && cHeight>=fm.height())
paintInfo.p->drawText(ax, ay+1, cWidth - 4, cHeight - 4, TQt::WordBreak, text );
}
}
}
else if (i && !i->isTransparent())
{
paintInfo.p->setPen( Qt::black ); // used for bitmaps
const TQPixmap& pix = i->pixmap();
if ( (cWidth != intrinsicWidth() || cHeight != intrinsicHeight()) &&
pix.width() > 0 && pix.height() > 0 && i->valid_rect().isValid())
{
if (resizeCache.isNull() && cWidth && cHeight && intrinsicWidth() && intrinsicHeight())
{
TQRect scaledrect(i->valid_rect());
scaledrect.setWidth( ( cWidth*scaledrect.width() ) / intrinsicWidth() );
scaledrect.setHeight( ( cHeight*scaledrect.height() ) / intrinsicHeight() );
// kdDebug(6040) << "time elapsed: " << dt->elapsed() << endl;
// kdDebug( 6040 ) << "have to scale: " << endl;
// tqDebug("cw=%d ch=%d pw=%d ph=%d rcw=%d, rch=%d",
// cWidth, cHeight, intrinsicWidth(), intrinsicHeight(), resizeCache.width(), resizeCache.height());
if(i->isVectorImage())
{
TQImage newRender = renderSVG(i->svg(), i->svgExtension(), cWidth, cHeight);
if(!resizeCache.convertFromImage(newRender))
{
kdDebug(6040) << "Could not convert TQImage of rendered SVG to TQPixmap!" << endl;
}
}
else
{
TQWMatrix matrix;
matrix.scale( (float)(cWidth)/intrinsicWidth(),
(float)(cHeight)/intrinsicHeight() );
resizeCache = pix.xForm( matrix );
// tqDebug("resizeCache size: %d/%d", resizeCache.width(), resizeCache.height());
// tqDebug("valid: %d/%d, scaled: %d/%d",
// i->valid_rect().width(), i->valid_rect().height(),
// scaledrect.width(), scaledrect.height());
// sometimes scaledrect.width/height are off by one because
// of rounding errors. if the i is fully loaded, we
// make sure that we don't do unnecessary resizes during painting
TQSize s(scaledrect.size());
if(i->valid_rect().size() == TQSize( intrinsicWidth(), intrinsicHeight() )) // fully loaded
s = TQSize(cWidth, cHeight);
if(kAbs(s.width() - cWidth) < 2) // rounding errors
s.setWidth(cWidth);
if(resizeCache.size() != s)
resizeCache.resize(s);
}
paintInfo.p->drawPixmap( TQPoint( _tx + leftBorder + leftPad, _ty + topBorder + topPad),
resizeCache, scaledrect );
}
else
paintInfo.p->drawPixmap( TQPoint( _tx + leftBorder + leftPad, _ty + topBorder + topPad), resizeCache );
}
else
{
// we might be just about switching images
TQRect rect(i->valid_rect().isValid() ? i->valid_rect()
: TQRect(0, 0, intrinsicWidth(), intrinsicHeight()));
TQPoint offs( _tx + leftBorder + leftPad, _ty + topBorder + topPad);
// tqDebug("normal paint rect %d/%d/%d/%d", rect.x(), rect.y(), rect.width(), rect.height());
// rect = rect & TQRect( 0 , y - offs.y() - 10, w, 10 + y + h - offs.y());
// tqDebug("normal paint rect after %d/%d/%d/%d", rect.x(), rect.y(), rect.width(), rect.height());
// tqDebug("normal paint: offs.y(): %d, y: %d, diff: %d", offs.y(), y, y - offs.y());
// tqDebug("");
// p->setClipRect(TQRect(x,y,w,h));
// p->drawPixmap( offs.x(), y, pix, rect.x(), rect.y(), rect.width(), rect.height() );
paintInfo.p->drawPixmap(offs, pix, rect);
}
}
if (m_selectionState != SelectionNone) {
// kdDebug(6040) << "_tx " << _tx << " _ty " << _ty << " _x " << _x << " _y " << _y << endl;
// Draw in any case if inside selection. For selection borders, the
// offset will decide whether to draw selection or not
bool draw = true;
if (m_selectionState != SelectionInside) {
int startPos, endPos;
selectionStartEnd(startPos, endPos);
if(selectionState() == SelectionStart)
endPos = 1;
else if(selectionState() == SelectionEnd)
startPos = 0;
draw = endPos - startPos > 0;
}
if (draw) {
// setting the brush origin is important for compatibility,
// don't touch it unless you know what you're doing
paintInfo.p->setBrushOrigin(_tx, _ty - paintInfo.r.y());
paintInfo.p->fillRect(_tx, _ty, width(), height(),
TQBrush(style()->palette().active().highlight(),
Qt::Dense4Pattern));
}
}
}
void RenderImage::layout()
{
TDEHTMLAssert( needsLayout());
TDEHTMLAssert( minMaxKnown() );
short oldwidth = m_width;
int oldheight = m_height;
// minimum height
m_height = m_cachedImage && m_cachedImage->isErrorImage() ? intrinsicHeight() : 0;
calcWidth();
calcHeight();
// if they are variable width and we calculate a huge height or width, we assume they
// actually wanted the intrinsic width.
if ( m_width > 4096 && !style()->width().isFixed() )
m_width = intrinsicWidth() + paddingLeft() + paddingRight() + borderLeft() + borderRight();
if ( m_height > 2048 && !style()->height().isFixed() )
m_height = intrinsicHeight() + paddingTop() + paddingBottom() + borderTop() + borderBottom();
// limit total size to not run out of memory when doing the xform call.
if ( ( m_width * m_height > 4096*2048 ) &&
( contentWidth() > intrinsicWidth() || contentHeight() > intrinsicHeight() ) ) {
float scale = sqrt( m_width*m_height / ( 4096.*2048. ) );
m_width = (int) (m_width/scale);
m_height = (int) (m_height/scale);
}
if ( m_width != oldwidth || m_height != oldheight )
resizeCache = TQPixmap();
setNeedsLayout(false);
}
void RenderImage::notifyFinished(CachedObject *finishedObj)
{
if ( ( m_cachedImage == finishedObj || m_oldImage == finishedObj ) && m_oldImage ) {
m_oldImage->deref( this );
m_oldImage = 0;
repaint();
}
RenderReplaced::notifyFinished(finishedObj);
}
bool RenderImage::nodeAtPoint(NodeInfo& info, int _x, int _y, int _tx, int _ty, HitTestAction hitTestAction, bool inside)
{
inside |= RenderReplaced::nodeAtPoint(info, _x, _y, _tx, _ty, hitTestAction, inside);
if (inside && element()) {
int tx = _tx + m_x;
int ty = _ty + m_y;
if (isRelPositioned())
relativePositionOffset(tx, ty);
HTMLImageElementImpl* i = element()->id() == ID_IMG ? static_cast<HTMLImageElementImpl*>(element()) : 0;
HTMLMapElementImpl* map;
if (i && i->getDocument()->isHTMLDocument() &&
(map = static_cast<HTMLDocumentImpl*>(i->getDocument())->getMap(i->imageMap()))) {
// we're a client side image map
inside = map->mapMouseEvent(_x - tx, _y - ty, contentWidth(), contentHeight(), info);
info.setInnerNonSharedNode(element());
}
}
return inside;
}
void RenderImage::updateImage(CachedImage* new_image)
{
CachedImage* tempimage = m_oldImage;
m_oldImage = m_cachedImage;
m_cachedImage = new_image;
assert( m_cachedImage != m_oldImage );
if ( m_cachedImage )
m_cachedImage->ref(this);
if ( tempimage )
tempimage->deref(this);
// if the loading finishes we might get an error and then the image is deleted
if ( m_cachedImage )
berrorPic = m_cachedImage->isErrorImage();
else
berrorPic = true;
}
void RenderImage::updateFromElement()
{
if (element()->id() == ID_INPUT)
alt = static_cast<HTMLInputElementImpl*>(element())->altText();
else if (element()->id() == ID_IMG)
alt = static_cast<HTMLImageElementImpl*>(element())->altText();
DOMString u = element()->id() == ID_OBJECT ?
element()->getAttribute(ATTR_DATA) : element()->getAttribute(ATTR_SRC);
if (!u.isEmpty() &&
( !m_cachedImage || m_cachedImage->url() != u ) ) {
CachedImage *new_image = element()->getDocument()->docLoader()->
requestImage(tdehtml::parseURL(u));
if(new_image && new_image != m_cachedImage)
updateImage( new_image );
}
}
bool RenderImage::complete() const
{
// "complete" means that the image has been loaded
// but also that its width/height (contentWidth(),contentHeight()) have been calculated.
return m_cachedImage && m_cachedImage->valid_rect().size() == m_cachedImage->pixmap_size() && !needsLayout();
}
bool RenderImage::isWidthSpecified() const
{
switch (style()->width().type()) {
case Fixed:
case Percent:
return true;
default:
return false;
}
assert(false);
return false;
}
bool RenderImage::isHeightSpecified() const
{
switch (style()->height().type()) {
case Fixed:
case Percent:
return true;
default:
return false;
}
assert(false);
return false;
}
short RenderImage::calcAspectRatioWidth() const
{
if (intrinsicHeight() == 0)
return 0;
if (!m_cachedImage || m_cachedImage->isErrorImage())
return intrinsicWidth(); // Don't bother scaling.
return RenderReplaced::calcReplacedHeight() * intrinsicWidth() / intrinsicHeight();
}
int RenderImage::calcAspectRatioHeight() const
{
if (intrinsicWidth() == 0)
return 0;
if (!m_cachedImage || m_cachedImage->isErrorImage())
return intrinsicHeight(); // Don't bother scaling.
return RenderReplaced::calcReplacedWidth() * intrinsicHeight() / intrinsicWidth();
}
short RenderImage::calcReplacedWidth() const
{
int width;
if (isWidthSpecified())
width = calcReplacedWidthUsing(Width);
else
width = calcAspectRatioWidth();
int minW = calcReplacedWidthUsing(MinWidth);
int maxW = style()->maxWidth().value() == UNDEFINED ? width : calcReplacedWidthUsing(MaxWidth);
if (width > maxW)
width = maxW;
if (width < minW)
width = minW;
return width;
}
int RenderImage::calcReplacedHeight() const
{
int height;
if (isHeightSpecified())
height = calcReplacedHeightUsing(Height);
else
height = calcAspectRatioHeight();
int minH = calcReplacedHeightUsing(MinHeight);
int maxH = style()->maxHeight().value() == UNDEFINED ? height : calcReplacedHeightUsing(MaxHeight);
if (height > maxH)
height = maxH;
if (height < minH)
height = minH;
return height;
}
#if 0
void RenderImage::caretPos(int offset, int flags, int &_x, int &_y, int &width, int &height)
{
RenderReplaced::caretPos(offset, flags, _x, _y, width, height);
#if 0 // doesn't work reliably
height = intrinsicHeight();
width = override && offset == 0 ? intrinsicWidth() : 0;
_x = xPos();
_y = yPos();
if (offset > 0) _x += intrinsicWidth();
RenderObject *cb = containingBlock();
int absx, absy;
if (cb && cb != this && cb->absolutePosition(absx,absy))
{
_x += absx;
_y += absy;
} else {
// we don't know our absolute position, and there is no point returning
// just a relative one
_x = _y = -1;
}
#endif
}
#endif
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