On Wed, Sep 28, 2005 at 11:28:33AM +0200, Jean-Marc Lasgouttes wrote:
> >>>>> "Martin" == Martin Vermeer <[EMAIL PROTECTED]> writes:
> 
> Martin> Alternatively, should we really try to interpret every boolean
> Martin> that gets returned somewhere as a sign that the screen needs
> Martin> updating?
> 
> I do not like how this is basically removing Andre's effort of
> avoiding updates for no particular reason.
> 
> As I understand it, it goes like:
> 
> * beginning of LyXText::dispatch
> 
>       bool needsUpdate = !lyxaction.funcHasFlag(cmd.action, 
> LyXAction::NoUpdate);
> 
> So we have marked in LyXAction some lfuns which have no reason to
> require an update.
> 
> * handling of such an lfun
> 
>       case LFUN_UP_PARAGRAPH:
>               if (!cur.mark())
>                       cur.clearSelection();
>               needsUpdate = cursorUpParagraph(cur);
>               finishChange(cur, false);
>               break;
> 
> needsUpdate was false in this case, we set it to true only if DEPM
> triggered. 
> 
> * end of LyXFunc::dispatch
> 
>               default: {
>                       view()->cursor().dispatch(cmd);
>                       update |= view()->cursor().result().update();
>                       if (!view()->cursor().result().dispatched())
>                               update |= view()->dispatch(cmd);
>                       break;
>               }
>               }
> 
>               if (view()->available()) {
>                       // Redraw screen unless explicitly told otherwise.
>                       // This also initializes the position cache for all 
> insets
>                       // in (at least partially) visible top-level paragraphs.
>                       if (update)
>                               view()->update(Update::FitCursor | 
> Update::Force);
>                       else
>                               view()->update(Update::FitCursor);
> 
> We dispatch to the cursor position, and look at the result. Depending
> on this result, we do the required update (seeing whether we changed
> screen is handled by Update::FitCursor of course).
> 
> So my question is what is _your_ vision of the update mechanism. I
> guess I do not understand why you change the logic in
> BufferView::Pimpl::update.

Slowly grasping it... perhaps you'll like the attached more. Note: no
change to lyxfunc. Same functionality (I checked)

- Martin

Index: ChangeLog
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/ChangeLog,v
retrieving revision 1.2291
diff -u -p -r1.2291 ChangeLog
--- ChangeLog   27 Sep 2005 08:48:52 -0000      1.2291
+++ ChangeLog   28 Sep 2005 12:09:33 -0000
@@ -1,3 +1,15 @@
+2005-09-28  Martin Vermeer  <[EMAIL PROTECTED]>
+
+       * BufferView_pimpl.C (update): choose arguments to update call so
+       that single-par update works most times
+       * text3.C (dispatch): carefully tune updating separately for
+       whole-screen and current-paragraph (yes, can probably be sanitized)
+       * rowpainter.C (paintText): 1) replace painting by caching for
+       the two extra paragraphs, because we can;
+       2) suppress greying out of areas below/above drawn area in case of
+       single-par refresh
+       * lyxfunc.C (dispatch): remove superfluous update
+
 2005-09-27  J�rgen Spitzm�ller  <[EMAIL PROTECTED]>
 
        * text.C (redoParagraph): fix calcultation of inset width wrt 
Index: BufferView_pimpl.C
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/BufferView_pimpl.C,v
retrieving revision 1.595
diff -u -p -r1.595 BufferView_pimpl.C
--- BufferView_pimpl.C  15 Sep 2005 13:55:45 -0000      1.595
+++ BufferView_pimpl.C  28 Sep 2005 12:09:34 -0000
@@ -666,12 +666,12 @@ void BufferView::Pimpl::update(Update::f
                theCoords.startUpdating();
 
                // First drawing step
-               ViewMetricsInfo vi = metrics();
+               ViewMetricsInfo vi = metrics(flags & Update::SinglePar);
                bool forceupdate(flags & Update::Force);
 
                if ((flags & Update::FitCursor) && fitCursor()) {
                        forceupdate = true;
-                       vi = metrics(flags & Update::SinglePar);
+                       vi = metrics();
                }
                if (forceupdate) {
                        // Second drawing step
@@ -1327,23 +1327,22 @@ ViewMetricsInfo BufferView::Pimpl::metri
        int pit2 = pit;
        size_t const npit = text->paragraphs().size();
 
-       lyxerr[Debug::DEBUG]
-                << BOOST_CURRENT_FUNCTION
-                << " npit: " << npit
-                << " pit1: " << pit1
-                << " pit2: " << pit2
-                << endl;
-
-       // Rebreak anchor par
-       text->redoParagraph(pit);
-       int y0 = text->getPar(pit1).ascent() - offset_ref_;
+       // Rebreak anchor paragraph. In Single Paragraph mode, rebreak only
+       // the (main text, not inset!) paragraph containing the cursor.
+       // (if this paragraph contains insets etc., rebreaking will 
+       // recursively descend)
+       if (!singlepar || pit == cursor_.bottom().pit())
+               text->redoParagraph(pit);
+       int y0 = text->getPar(pit).ascent() - offset_ref_;
 
-       // Redo paragraphs above cursor if necessary
+       // Redo paragraphs above anchor if necessary; again, in Single Par
+       // mode, only if we encounter the (main text) one having the cursor.
        int y1 = y0;
-       while (!singlepar && y1 > 0 && pit1 > 0) {
+       while (y1 > 0 && pit1 > 0) {
                y1 -= text->getPar(pit1).ascent();
                --pit1;
-               text->redoParagraph(pit1);
+               if (!singlepar || pit1 == cursor_.bottom().pit())
+                       text->redoParagraph(pit1);
                y1 -= text->getPar(pit1).descent();
        }
 
@@ -1362,12 +1361,14 @@ ViewMetricsInfo BufferView::Pimpl::metri
                anchor_ref_ = 0;
        }
 
-       // Redo paragraphs below cursor if necessary
+       // Redo paragraphs below the anchor if necessary. Single par mode:
+       // only the one containing the cursor if encountered.
        int y2 = y0;
-       while (!singlepar && y2 < bv.workHeight() && pit2 < int(npit) - 1) {
+       while (y2 < bv.workHeight() && pit2 < int(npit) - 1) {
                y2 += text->getPar(pit2).descent();
                ++pit2;
-               text->redoParagraph(pit2);
+               if (!singlepar || pit2 == cursor_.bottom().pit())
+                       text->redoParagraph(pit2);
                y2 += text->getPar(pit2).ascent();
        }
 
@@ -1379,13 +1380,28 @@ ViewMetricsInfo BufferView::Pimpl::metri
        for (lyx::pit_type pit = pit1; pit <= pit2; ++pit) {
                y += text->getPar(pit).ascent();
                theCoords.parPos()[text][pit] = Point(0, y);
+               if (singlepar && pit == cursor_.bottom().pit()) {
+                       // In Single Paragraph mode, collect here the 
+                       // y1 and y2 of the (one) paragraph the cursor is in
+                       y1 = y - text->getPar(pit).ascent();
+                       y2 = y + text->getPar(pit).descent();
+               }
                y += text->getPar(pit).descent();
        }
 
+       if (singlepar) { // collect cursor paragraph iter bounds
+               pit1 = cursor_.bottom().pit();
+               pit2 = cursor_.bottom().pit();
+       }
+       
        lyxerr[Debug::DEBUG]
                 << BOOST_CURRENT_FUNCTION
                 << " y1: " << y1
                 << " y2: " << y2
+                << " pit1: " << pit1
+                << " pit2: " << pit2
+                << " npit: " << npit
+                << " singlepar: " << singlepar
                 << endl;
 
        return ViewMetricsInfo(pit1, pit2, y1, y2, singlepar);
Index: text3.C
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/text3.C,v
retrieving revision 1.308
diff -u -p -r1.308 text3.C
--- text3.C     27 Sep 2005 08:42:28 -0000      1.308
+++ text3.C     28 Sep 2005 12:09:34 -0000
@@ -1117,6 +1117,9 @@ void LyXText::dispatch(LCursor & cur, Fu
                current_font.setLanguage(lang);
                real_current_font.setLanguage(lang);
 
+               // Remember the old paragraph metric
+               Dimension olddim = cur.paragraph().dim();
+
                string::const_iterator cit = cmd.argument.begin();
                string::const_iterator end = cmd.argument.end();
                for (; cit != end; ++cit)
@@ -1125,10 +1128,11 @@ void LyXText::dispatch(LCursor & cur, Fu
 
                cur.resetAnchor();
                moveCursor(cur, false);
-
-               needsUpdate = redoParagraph(cur.pit());
+               // Inserting characters changes par height
+               needsUpdate = cur.paragraph().dim().asc != olddim.asc ||
+                             cur.paragraph().dim().des != olddim.des;
                if (!needsUpdate) {
-                       // update only this paragraph
+                       // if not, update _only_ this paragraph
                        cur.bv().update(Update::SinglePar | Update::Force);
                }
 
Index: rowpainter.C
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/rowpainter.C,v
retrieving revision 1.157
diff -u -p -r1.157 rowpainter.C
--- rowpainter.C        19 Sep 2005 11:18:20 -0000      1.157
+++ rowpainter.C        28 Sep 2005 12:09:35 -0000
@@ -769,30 +769,30 @@ void paintText(BufferView const & bv, Vi
                yy += text->getPar(pit).descent();
        }
 
-
-       // paint one paragraph above and one below
+       // Cache one paragraph above and one below
        // Note MV: this cannot be suppressed even for singlepar.
        // Try viewing the User Guide Mobius figure
+
        if (vi.p1 > 0) {
                text->redoParagraph(vi.p1 - 1);
-               paintPar(pi, *bv.text(), vi.p1 - 1, 0,
-                        vi.y1 -  text->getPar(vi.p1 - 1).descent());
+               theCoords.parPos()[bv.text()][vi.p1 - 1] = 
+                       Point(0, vi.y1 - text->getPar(vi.p1 - 1).descent());
        }
 
        if (vi.p2 < lyx::pit_type(text->paragraphs().size()) - 1) {
                text->redoParagraph(vi.p2 + 1);
-               paintPar(pi, *bv.text(), vi.p2 + 1, 0,
-                        vi.y2 + text->getPar(vi.p2 + 1).ascent());
+               theCoords.parPos()[bv.text()][vi.p2 + 1] = 
+                       Point(0, vi.y2 + text->getPar(vi.p2 + 1).ascent());
        }
 
        // and grey out above (should not happen later)
 //     lyxerr << "par ascent: " << text->getPar(vi.p1).ascent() << endl;
-       if (vi.y1 > 0)
+       if (vi.y1 > 0 && !vi.singlepar)
                pain.fillRectangle(0, 0, bv.workWidth(), vi.y1, 
LColor::bottomarea);
 
        // and possibly grey out below
 //     lyxerr << "par descent: " << text->getPar(vi.p1).ascent() << endl;
-       if (vi.y2 < bv.workHeight())
+       if (vi.y2 < bv.workHeight() && !vi.singlepar)
                pain.fillRectangle(0, vi.y2, bv.workWidth(), bv.workHeight() - 
vi.y2, LColor::bottomarea);
 }
 
Index: frontends/qt2/ChangeLog
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/frontends/qt2/ChangeLog,v
retrieving revision 1.822
diff -u -p -r1.822 ChangeLog
--- frontends/qt2/ChangeLog     26 Sep 2005 18:42:54 -0000      1.822
+++ frontends/qt2/ChangeLog     28 Sep 2005 12:09:39 -0000
@@ -1,3 +1,8 @@
+2005-09-28  Martin Vermeer  <[EMAIL PROTECTED]>
+
+       * QContentPane.C (QContentPane): make times 50 msec instead of 25,
+       will consume less CPU (Thanks Angus profiling)
+
 2005-09-15  J�rgen Spitzm�ller  <[EMAIL PROTECTED]>
 
        * QTabular.C: disable newpageCB when !longtabular.
Index: frontends/qt2/QContentPane.C
===================================================================
RCS file: /usr/local/lyx/cvsroot/lyx-devel/src/frontends/qt2/QContentPane.C,v
retrieving revision 1.35
diff -u -p -r1.35 QContentPane.C
--- frontends/qt2/QContentPane.C        6 Jun 2005 12:34:28 -0000       1.35
+++ frontends/qt2/QContentPane.C        28 Sep 2005 12:09:39 -0000
@@ -104,7 +104,7 @@ QContentPane::QContentPane(QWorkArea * p
                this, SLOT(scrollBarChanged(int)));
 
        // Start the timer, one-shot.
-       step_timer_.start(25, true);
+       step_timer_.start(50, true);
 }
 
 

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