lyx_mirror/src/WorkArea.C
Jürgen Vigna 92904c615a Fix polling of selection request to not call the asString function every time.
Fixed a redraw problem for InsetGraphics (fix #271).


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3787 a592a061-630c-0410-9148-cb99ea01b6c8
2002-03-20 10:36:03 +00:00

628 lines
16 KiB
C

/* This file is part of
* ======================================================
*
* LyX, The Document Processor
*
* Copyright 1995 Matthias Ettrich
* Copyright 1995-2001 The LyX Team.
*
* ====================================================== */
#include <config.h>
#ifdef __GNUG__
#pragma implementation
#endif
#include "WorkArea.h"
#include "debug.h"
#include "LyXView.h"
#include "lyxrc.h" // lyxrc.show_banner
#include "version.h" // lyx_version
#if FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5)
#include "lyxlookup.h"
#endif
#include "support/filetools.h" // LibFileSearch
#include "support/lstrings.h"
#include "support/LAssert.h"
#include <cmath>
#include <cctype>
// xforms doesn't define this (but it should be in <forms.h>).
extern "C"
FL_APPEVENT_CB fl_set_preemptive_callback(Window, FL_APPEVENT_CB, void *);
using std::endl;
using std::abs;
using std::hex;
namespace {
inline
void waitForX()
{
XSync(fl_get_display(), 0);
}
} // anon namespace
extern "C" {
// Just a bunch of C wrappers around static members of WorkArea
static
void C_WorkArea_scroll_cb(FL_OBJECT * ob, long buf)
{
WorkArea::scroll_cb(ob, buf);
}
static
int C_WorkArea_work_area_handler(FL_OBJECT * ob, int event,
FL_Coord, FL_Coord,
int key, void * xev)
{
return WorkArea::work_area_handler(ob, event,
0, 0, key, xev);
}
static
int C_WorkAreaEventCB(FL_FORM * form, void * xev) {
WorkArea * wa = static_cast<WorkArea*>(form->u_vdata);
int ret = wa->event_cb(static_cast<XEvent*>(xev));
lyxerr << "Pending: " << XPending(fl_get_display()) << endl;
return ret;
}
}
WorkArea::WorkArea(int xpos, int ypos, int width, int height)
: splash_(0), splash_text_(0), workareapixmap(0), painter_(*this)
{
fl_freeze_all_forms();
if (lyxerr.debugging(Debug::WORKAREA))
lyxerr << "Creating work area: +"
<< xpos << '+' << ypos << ' '
<< width << 'x' << height << endl;
//
FL_OBJECT * obj;
int const bw = int(abs(fl_get_border_width()));
// a box
if (lyxerr.debugging(Debug::WORKAREA))
lyxerr << "\tbackground box: +"
<< xpos << '+' << ypos << ' '
<< width - 15 << 'x' << height << endl;
backgroundbox = obj = fl_add_box(FL_BORDER_BOX,
xpos, ypos,
width - 15,
height,"");
fl_set_object_resize(obj, FL_RESIZE_ALL);
fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
// Add a splash screen to the centre of the work area
string const splash_file = (lyxrc.show_banner) ?
LibFileSearch("images", "banner", "xpm") : string();
if (!splash_file.empty()) {
int const splash_w = 425;
int const splash_h = 290;
int const splash_x = xpos + (width - 15 - splash_w) / 2;
int const splash_y = ypos + (height - splash_h) / 2;
splash_ = obj =
fl_add_pixmapbutton(FL_NORMAL_BUTTON,
splash_x, splash_y,
splash_w, splash_h, "");
fl_set_pixmapbutton_file(obj, splash_file.c_str());
fl_set_pixmapbutton_focus_outline(obj, 3);
fl_set_object_boxtype(obj, FL_NO_BOX);
int const text_x = splash_x + 260;
int const text_y = splash_y + 255;
splash_text_ = obj =
fl_add_text(FL_NORMAL_TEXT, text_x, text_y, 160, 16,
lyx_version);
fl_set_object_lsize(obj, FL_NORMAL_SIZE);
fl_mapcolor(FL_FREE_COL2, 0x2b, 0x47, 0x82);
fl_mapcolor(FL_FREE_COL3, 0xe1, 0xd2, 0x9b);
fl_set_object_color(obj, FL_FREE_COL2, FL_FREE_COL2);
fl_set_object_lcol(obj, FL_FREE_COL3);
fl_set_object_lalign(obj, FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
fl_set_object_lstyle(obj, FL_BOLD_STYLE);
}
//
// THE SCROLLBAR
//
scrollbar = obj = fl_add_scrollbar(FL_VERT_SCROLLBAR,
xpos + width - 15,
ypos, 17, height, "");
fl_set_object_boxtype(obj, FL_UP_BOX);
fl_set_object_resize(obj, FL_RESIZE_ALL);
fl_set_object_gravity(obj, NorthEastGravity, SouthEastGravity);
obj->u_vdata = this;
fl_set_object_callback(obj, C_WorkArea_scroll_cb, 0);
setScrollbarBounds(0.0, 0.0);
///
/// The free object
// Create the workarea pixmap
createPixmap(width - 15 - 2 * bw, height - 2 * bw);
// We add this object as late as possible to avoit problems
// with drawing.
if (lyxerr.debugging(Debug::WORKAREA))
lyxerr << "\tfree object: +"
<< xpos + bw << '+' << ypos + bw << ' '
<< width - 15 - 2 * bw << 'x'
<< height - 2 * bw << endl;
work_area = obj = fl_add_free(FL_ALL_FREE,
xpos + bw, ypos + bw,
width - 15 - 2 * bw, // scrollbarwidth
height - 2 * bw, "",
C_WorkArea_work_area_handler);
obj->wantkey = FL_KEY_ALL;
obj->u_vdata = this; /* This is how we pass the WorkArea
to the work_area_handler. */
fl_set_object_boxtype(obj,FL_DOWN_BOX);
fl_set_object_resize(obj, FL_RESIZE_ALL);
fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
/// X selection hook - xforms gets it wrong
fl_current_form->u_vdata = this;
fl_register_raw_callback(fl_current_form, FL_ALL_EVENT, C_WorkAreaEventCB);
fl_unfreeze_all_forms();
}
WorkArea::~WorkArea()
{
if (workareapixmap)
XFreePixmap(fl_get_display(), workareapixmap);
}
bool WorkArea::belowMouse() const
{
FL_Coord x, y;
unsigned int button;
fl_get_mouse(&x, &y, &button);
FL_Coord ulx = work_area->form->x + work_area->x;
FL_Coord uly = work_area->form->y + work_area->y;
FL_Coord w = work_area->w;
FL_Coord h = work_area->h;
if (x > ulx && y > uly && x < ulx + h && y < uly + w)
return true;
return false;
}
void WorkArea::resize(int xpos, int ypos, int width, int height)
{
fl_freeze_all_forms();
int const bw = int(abs(fl_get_border_width()));
// a box
fl_set_object_geometry(backgroundbox, xpos, ypos, width - 15, height);
//
// THE SCROLLBAR
//
fl_set_object_geometry(scrollbar, xpos + width - 15,
ypos, 17, height);
// Create the workarea pixmap
createPixmap(width - 15 - 2 * bw, height - 2 * bw);
// the free object
fl_set_object_geometry(work_area, xpos + bw, ypos + bw,
width - 15 - 2 * bw,
height - 2 * bw);
fl_unfreeze_all_forms();
}
namespace {
void destroy_object(FL_OBJECT * obj)
{
if (!obj)
return;
if (obj->visible) {
fl_hide_object(obj);
}
fl_delete_object(obj);
fl_free_object(obj);
}
} // namespace anon
void WorkArea::createPixmap(int width, int height)
{
// Three calls to createPixmap are needed to draw the initial view
// of LyX. Any more and the splash is destroyed.
static int counter = 0;
if (++counter == 4) {
destroy_object(splash_);
splash_ = 0;
destroy_object(splash_text_);
splash_text_ = 0;
}
static int cur_width = -1;
static int cur_height = -1;
if (cur_width == width && cur_height == height && workareapixmap)
return;
cur_width = width;
cur_height = height;
if (workareapixmap)
XFreePixmap(fl_get_display(), workareapixmap);
if (lyxerr.debugging(Debug::WORKAREA))
lyxerr << "Creating pixmap ("
<< width << 'x' << height << ")" << endl;
workareapixmap = XCreatePixmap(fl_get_display(),
RootWindow(fl_get_display(), 0),
width,
height,
fl_get_visual_depth());
if (lyxerr.debugging(Debug::WORKAREA))
lyxerr << "\tpixmap=" << workareapixmap << endl;
}
void WorkArea::greyOut() const
{
if (!splash_) {
fl_winset(FL_ObjWin(work_area));
fl_rectangle(1, work_area->x, work_area->y,
work_area->w, work_area->h, FL_GRAY63);
}
}
void WorkArea::setFocus() const
{
fl_set_focus_object(work_area->form, work_area);
}
void WorkArea::setScrollbar(double pos, double length_fraction) const
{
fl_set_scrollbar_value(scrollbar, pos);
fl_set_scrollbar_size(scrollbar, scrollbar->h * length_fraction);
}
void WorkArea::setScrollbarBounds(double l1, double l2) const
{
fl_set_scrollbar_bounds(scrollbar, l1, l2);
}
void WorkArea::setScrollbarIncrements(double inc) const
{
fl_set_scrollbar_increment(scrollbar, work_area->h - inc, inc);
}
// Callback for scrollbar slider
void WorkArea::scroll_cb(FL_OBJECT * ob, long)
{
WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
// If we really want the accellerating scroll we can do that
// from here. IMHO that is a waste of effort since we already
// have other ways to move fast around in the document. (Lgb)
area->scrollCB(fl_get_scrollbar_value(ob));
waitForX();
}
int WorkArea::work_area_handler(FL_OBJECT * ob, int event,
FL_Coord, FL_Coord ,
int key, void * xev)
{
static int x_old = -1;
static int y_old = -1;
static long scrollbar_value_old = -1;
XEvent * ev = static_cast<XEvent*>(xev);
WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
if (!area) return 1;
switch (event) {
case FL_DRAW:
if (!area->work_area ||
!area->work_area->form->visible)
return 1;
lyxerr[Debug::WORKAREA] << "Workarea event: DRAW" << endl;
area->createPixmap(area->workWidth(), area->height());
area->workAreaExpose();
break;
case FL_PUSH:
if (!ev || ev->xbutton.button == 0) break;
// Should really have used xbutton.state
lyxerr[Debug::WORKAREA] << "Workarea event: PUSH" << endl;
area->workAreaButtonPress(ev->xbutton.x - ob->x,
ev->xbutton.y - ob->y,
ev->xbutton.button);
//area->workAreaKeyPress(XK_Pointer_Button1, ev->xbutton.state);
break;
case FL_RELEASE:
if (!ev || ev->xbutton.button == 0) break;
// Should really have used xbutton.state
lyxerr[Debug::WORKAREA] << "Workarea event: RELEASE" << endl;
area->workAreaButtonRelease(ev->xbutton.x - ob->x,
ev->xbutton.y - ob->y,
ev->xbutton.button);
break;
#if FL_REVISION < 89
case FL_MOUSE:
#else
case FL_DRAG:
#endif
if (!ev || ! area->scrollbar) break;
if (ev->xmotion.x != x_old ||
ev->xmotion.y != y_old ||
fl_get_scrollbar_value(area->scrollbar) != scrollbar_value_old
) {
lyxerr[Debug::WORKAREA] << "Workarea event: MOUSE" << endl;
area->workAreaMotionNotify(ev->xmotion.x - ob->x,
ev->xmotion.y - ob->y,
ev->xbutton.state);
}
break;
#if FL_REVISION < 89
case FL_KEYBOARD:
#else
case FL_KEYPRESS:
#endif
{
lyxerr[Debug::WORKAREA] << "Workarea event: KEYBOARD" << endl;
KeySym keysym = 0;
char dummy[1];
XKeyEvent * xke = reinterpret_cast<XKeyEvent *>(ev);
#if FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5)
// XForms < 0.89.5 does not have compose support
// so we are using our own compose support
LyXLookupString(ev, dummy, 1, &keysym);
#else
XLookupString(xke, dummy, 1, &keysym, 0);
#endif
if (lyxerr.debugging(Debug::KEY)) {
char const * tmp = XKeysymToString(key);
char const * tmp2 = XKeysymToString(keysym);
string const stm = (tmp ? tmp : "");
string const stm2 = (tmp2 ? tmp2 : "");
lyxerr[Debug::KEY] << "WorkArea: Key is `" << stm << "' ["
<< key << "]" << endl;
lyxerr[Debug::KEY] << "WorkArea: Keysym is `" << stm2 << "' ["
<< keysym << "]" << endl;
}
#if FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5)
if (keysym == NoSymbol) {
lyxerr[Debug::KEY]
<< "Empty kdb action (probably composing)"
<< endl;
break;
}
KeySym ret_key = keysym;
#else
// Note that we need this handling because of a bug
// in XForms 0.89, if this bug is resolved in the way I hope
// we can just use the keysym directly with out looking
// at key at all. (Lgb)
KeySym ret_key = 0;
if (!key) {
// We migth have to add more keysyms here also,
// we will do that as the issues arise. (Lgb)
if (keysym == XK_space) {
ret_key = keysym;
lyxerr[Debug::KEY] << "Using keysym [A]"
<< endl;
} else
break;
} else {
// It seems that this was a bit optimistic...
// With this hacking things seems to be better (Lgb)
//if (!iscntrl(key)) {
// ret_key = key;
// lyxerr[Debug::KEY]
// << "Using key [B]\n"
// << "Uchar["
// << static_cast<unsigned char>(key)
// << endl;
//} else {
ret_key = (keysym ? keysym : key);
lyxerr[Debug::KEY] << "Using keysym [B]"
<< endl;
//}
}
#endif
unsigned int const ret_state = xke->state;
// If you have a better way to handle "wild-output" of
// characters after the key has been released than the one
// below, please contact me. (Lgb)
static Time last_time_pressed;
static unsigned int last_key_pressed;
static unsigned int last_state_pressed;
lyxerr[Debug::KEY] << "Workarea Diff: "
<< xke->time - last_time_pressed
<< endl;
if (xke->time - last_time_pressed < 25 // should perhaps be tunable
&& ret_state == last_state_pressed
&& xke->keycode == last_key_pressed) {
lyxerr[Debug::KEY]
<< "Workarea: Purging X events." << endl;
//lyxerr << "Workarea Events: "
// << XEventsQueued(fl_get_display(), QueuedAlready)
// << endl;
if (XEventsQueued(fl_get_display(), QueuedAlready) > 0)
XSync(fl_get_display(), 1);
// This purge make f.ex. scrolling stop immidiatly when
// releasing the PageDown button. The question is if
// this purging of XEvents can cause any harm...
// after some testing I can see no problems, but
// I'd like other reports too.
break;
}
last_time_pressed = xke->time;
last_key_pressed = xke->keycode;
last_state_pressed = ret_state;
area->workAreaKeyPress(ret_key, ret_state);
}
break;
#if FL_REVISION >= 89
case FL_KEYRELEASE:
lyxerr[Debug::WORKAREA] << "Workarea event: KEYRELEASE" << endl;
break;
#endif
case FL_FOCUS:
lyxerr[Debug::WORKAREA] << "Workarea event: FOCUS" << endl;
area->workAreaFocus();
break;
case FL_UNFOCUS:
lyxerr[Debug::WORKAREA] << "Workarea event: UNFOCUS" << endl;
area->workAreaUnfocus();
break;
case FL_ENTER:
lyxerr[Debug::WORKAREA] << "Workarea event: ENTER" << endl;
area->workAreaEnter();
break;
case FL_LEAVE:
lyxerr[Debug::WORKAREA] << "Workarea event: LEAVE" << endl;
area->workAreaLeave();
break;
case FL_DBLCLICK:
if (!ev) break;
lyxerr[Debug::WORKAREA] << "Workarea event: DBLCLICK" << endl;
area->workAreaDoubleClick(ev->xbutton.x - ob->x,
ev->xbutton.y - ob->y,
ev->xbutton.button);
break;
case FL_TRPLCLICK:
if (!ev) break;
lyxerr[Debug::WORKAREA] << "Workarea event: TRPLCLICK" << endl;
area->workAreaTripleClick(ev->xbutton.x - ob->x,
ev->xbutton.y - ob->y,
ev->xbutton.button);
break;
case FL_OTHER:
if (!ev) break;
lyxerr[Debug::WORKAREA] << "Workarea event: OTHER" << endl;
break;
}
return 1;
}
namespace {
string clipboard_selection;
bool clipboard_read = false;
extern "C" {
static
int request_clipboard_cb(FL_OBJECT * /*ob*/, long /*type*/,
void const * data, long size)
{
clipboard_selection.erase();
if (size > 0)
clipboard_selection.reserve(size);
for (int i = 0; i < size; ++i)
clipboard_selection +=
static_cast<char const *>(data)[i];
clipboard_read = true;
return 0;
}
}
} // namespace anon
int WorkArea::event_cb(XEvent * xev)
{
int ret = 0;
switch (xev->type) {
case SelectionRequest:
lyxerr[Debug::GUI] << "X requested selection." << endl;
selectionRequested.emit();
// ret = 1;
break;
case SelectionClear:
lyxerr[Debug::GUI] << "Lost selection." << endl;
selectionLost.emit();
// ret = 1;
break;
}
return ret;
}
void WorkArea::haveSelection(bool yes) const
{
if (!yes) {
XSetSelectionOwner(fl_get_display(), XA_PRIMARY, None, CurrentTime);
return;
}
XSetSelectionOwner(fl_get_display(), XA_PRIMARY, FL_ObjWin(work_area), CurrentTime);
}
string const WorkArea::getClipboard() const
{
clipboard_read = false;
if (fl_request_clipboard(work_area, 0, request_clipboard_cb) == -1)
return string();
XEvent ev;
while (!clipboard_read) {
if (fl_check_forms() == FL_EVENT) {
fl_XNextEvent(&ev);
lyxerr << "Received unhandled X11 event" << endl;
lyxerr << "Type: 0x" << hex << ev.xany.type <<
" Target: 0x" << hex << ev.xany.window << endl;
}
}
return clipboard_selection;
}
void WorkArea::putClipboard(string const & s) const
{
static string hold;
hold = s;
fl_stuff_clipboard(work_area, 0, hold.data(), hold.size(), 0);
}