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85798535a1
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@632 a592a061-630c-0410-9148-cb99ea01b6c8
374 lines
8.9 KiB
C
374 lines
8.9 KiB
C
/*
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* File: math_draw.C
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* Purpose: Interaction and drawing for mathed
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* Author: Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
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* Created: January 1996
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* Description: Math drawing and interaction for a WYSIWYG math editor.
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*
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* Dependencies: Xlib, XForms
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*
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* Copyright: 1996, Alejandro Aguilar Sierra
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*
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* Version: 0.8beta, Mathed & Lyx project.
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*
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* You are free to use and modify this code under the terms of
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* the GNU General Public Licence version 2 or later.
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*/
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#include <config.h>
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#include FORMS_H_LOCATION
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#include "math_cursor.h"
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#include "math_parser.h"
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#include "debug.h"
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#include "lyxfont.h"
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#include "Painter.h"
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using std::endl;
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extern LyXFont mathed_get_font(short type, int size);
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extern int mathed_char_width(short type, int style, byte c);
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extern int mathed_string_width(short type, int style, byte const* s, int ls);
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extern int mathed_string_height(short, int, byte const*, int, int&, int&);
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extern int mathed_char_height(short, int, byte, int&, int&);
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void
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MathSpaceInset::draw(Painter & pain, int x, int y)
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{
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// XPoint p[4] = {{++x, y-3}, {x, y}, {x+width-2, y}, {x+width-2, y-3}};
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// Sadly, HP-UX CC can't handle that kind of initialization.
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int xp[4];
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int yp[4];
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xp[0] = ++x; yp[0] = y - 3;
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xp[1] = x; yp[1] = y;
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xp[2] = x + width - 2; yp[2] = y;
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xp[3] = x + width - 2; yp[3] = y - 3;
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pain.lines(xp, yp, 4, (space) ? LColor::latex : LColor::math);
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}
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void
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MathParInset::draw(Painter & pain, int x, int y)
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{
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byte cx, cxp = 0;
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int xp = 0, ls;
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int asc = df_asc, des = 0;
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bool limits = false;
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xo = x; yo = y;
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if (!array || array->empty()) {
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if (array) {
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MathedXIter data(this);
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data.GetPos(x, y);
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}
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pain.rectangle(x, y - df_asc, df_width, df_asc, LColor::mathline);
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return;
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}
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MathedXIter data(this);
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data.GoBegin();
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while (data.OK()) {
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data.GetPos(x, y);
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cx = data.GetChar();
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if (cx >= ' ') {
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byte * s = data.GetString(ls);
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drawStr(pain, data.FCode(), size, x, y, s, ls);
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mathed_char_height(LM_TC_CONST, size, 'y', asc, des);
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limits = false;
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} else {
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if (cx == 0) break;
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if (MathIsInset(cx)) {
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int yy = y;
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MathedInset * p = data.GetInset();
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if (cx == LM_TC_UP) {
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if (limits) {
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x -= (xp>p->Width()) ? p->Width()+(xp-p->Width())/2: xp;
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yy -= (asc + p->Descent()+4);
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} else
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yy -= (p->Descent()>asc) ? p->Descent()+4: asc;
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} else
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if (cx == LM_TC_DOWN) {
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if (limits) {
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x -= (xp>p->Width()) ? p->Width()+(xp-p->Width())/2: xp;
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yy += des + p->Ascent() + 2;
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} else
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yy += des + p->Ascent()/2;
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} else {
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asc = p->Ascent();
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des = p->Descent();
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}
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p->draw(pain, x, yy);
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if (cx!= LM_TC_UP && cx!= LM_TC_DOWN) {
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limits = p->GetLimits();
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if (limits) xp = p->Width();
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}
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data.Next();
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} else
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if (cx == LM_TC_TAB) {
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if ((cxp == cx || cxp == LM_TC_CR || data.IsFirst())) { // && objtype == L
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pain.rectangle(x, y - df_asc, df_width, df_asc,
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LColor::mathline);
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}
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data.Next();
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limits = false;
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} else
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if (cx == LM_TC_CR) {
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if (cxp == LM_TC_TAB || cxp == LM_TC_CR || data.IsFirst()) { // && objtype == LM_OT_MATRIX) {
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pain.rectangle(x, y - df_asc, df_width, df_asc,
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LColor::mathline);
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}
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data.Next();
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limits = false;
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}
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else {
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lyxerr << "GMathed Error: Unrecognized code[" << cx
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<< "]" << endl;
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break;
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}
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}
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cxp = cx;
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}
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if (cxp == LM_TC_TAB || cxp == LM_TC_CR) { // && objtype == LM_OT_MATRIX) {
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data.GetPos(x, y);
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pain.rectangle(x, y - df_asc, df_width, df_asc, LColor::mathline);
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}
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}
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void
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MathParInset::Metrics()
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{
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byte cx, cxp= 0, *s;
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int ls;
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int asc= df_asc, des= 0;
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int tb = 0, tab= 0;
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bool limits = false;
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ascent = df_asc;//mathed_char_height(LM_TC_VAR, size, 'I', asc, des);
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width = df_width;
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descent = 0;
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if (!array) return;
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if (array->empty()) return;
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ascent = 0;
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MathedXIter data(this);
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data.GoBegin();
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while (data.OK()) {
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cx = data.GetChar();
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if (cx >= ' ') {
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s = data.GetString(ls);
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mathed_string_height(data.FCode(), size, s, ls, asc, des);
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if (asc > ascent) ascent = asc;
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if (des > descent) descent = des;
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limits = false;
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mathed_char_height(LM_TC_CONST, size, 'y', asc, des);
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} else
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if (MathIsInset(cx)) {
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MathedInset *p = data.GetInset();
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p->SetStyle(size);
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p->Metrics();
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if (cx == LM_TC_UP) {
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asc += (limits) ? p->Height()+4: p->Ascent() +
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((p->Descent()>asc) ? p->Descent()-asc+4: 0);
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} else
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if (cx == LM_TC_DOWN) {
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des += ((limits) ? p->Height()+4: p->Height()-p->Ascent()/2);
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} else {
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asc = p->Ascent();
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des = p->Descent();
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}
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if (asc > ascent) ascent = asc;
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if (des > descent) descent = des;
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if (cx!= LM_TC_UP && cx!= LM_TC_DOWN)
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limits = p->GetLimits();
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data.Next();
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} else
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if (cx == LM_TC_TAB) {
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int x, y;
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data.GetIncPos(x, y);
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if (data.IsFirst() || cxp == LM_TC_TAB || cxp == LM_TC_CR) {
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if (ascent<df_asc) ascent = df_asc;
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tb = x;
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}
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data.setTab(x-tb, tab);
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tb = x;
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++tab;
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limits = false;
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data.Next();
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} else
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if (cx == LM_TC_CR) {
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if (tb>0) {
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int x, y;
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data.GetIncPos(x, y);
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if (data.IsFirst() || cxp == LM_TC_TAB || cxp == LM_TC_CR) {
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if (ascent<df_asc) ascent = df_asc;
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tb = x;
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}
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data.setTab(x-tb, tab);
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} else //if (GetColumns() == 1)
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{
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int x, y;
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data.GetIncPos(x, y);
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data.setTab(x, tab);
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if (ascent<df_asc) ascent = df_asc;
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}
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tb= tab= 0;
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data.subMetrics(ascent, descent);
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ascent = df_asc;
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descent = 0;
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data.Next();
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}
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else {
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lyxerr << "Mathed Error: Unrecognized code[" << cx
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<< "]" << endl;
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break;
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}
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cxp = cx;
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}
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data.GetIncPos(width, ls);
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// No matter how simple is a matrix, it is NOT a subparagraph
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if (isMatrix()) {
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if (cxp == LM_TC_TAB) {
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if (ascent<df_asc) ascent = df_asc;
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data.setTab(0, tab);
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} else {
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data.setTab(width-tb, tab);
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}
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}
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data.subMetrics(ascent, descent);
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}
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void
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MathSqrtInset::draw(Painter & pain, int x, int y)
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{
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MathParInset::draw(pain, x + hmax + 2, y);
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int h = ascent;
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int d = descent;
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int h2 = Height() / 2;
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int w2 = (Height() > 4 * hmax) ? hmax : hmax / 2;
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int xp[4], yp[4];
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xp[0] = x + hmax + wbody; yp[0] = y - h;
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xp[1] = x + hmax; yp[1] = y - h;
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xp[2] = x + w2; yp[2] = y + d;
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xp[3] = x; yp[3] = y + d - h2;
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pain.lines(xp, yp, 4, LColor::mathline);
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}
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void
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MathSqrtInset::Metrics()
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{
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MathParInset::Metrics();
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ascent += 4;
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descent += 2;
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int a, b;
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hmax = mathed_char_height(LM_TC_VAR, size, 'I', a, b);
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if (hmax < 10) hmax = 10;
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wbody = width + 4;
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width += hmax + 4;
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}
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void
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MathFracInset::draw(Painter & pain, int x, int y)
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{
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short idxp = idx;
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short sizex = size;
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idx = 0;
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if (size == LM_ST_DISPLAY) ++size;
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MathParInset::draw(pain, x + (width - w0) / 2, y - des0);
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den->draw(pain, x + (width - w1) / 2, y + den->Ascent() + 2 - dh);
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size = sizex;
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if (objtype == LM_OT_FRAC)
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pain.line(x + 2, y - dh, x + width - 4, y - dh, LColor::mathline);
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idx = idxp;
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}
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void
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MathFracInset::Metrics()
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{
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if (!dh) {
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int a, b;
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dh = mathed_char_height(LM_TC_CONST, size, 'I', a, b)/2;
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}
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short idxp = idx;
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short sizex = size;
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idx = 0;
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if (size == LM_ST_DISPLAY) ++size;
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MathParInset::Metrics();
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size = sizex;
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w0 = width;
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int as = Height() + 2 + dh;
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des0 = Descent() + 2 + dh;
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den->Metrics();
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w1 = den->Width();
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width = ((w0 > w1) ? w0: w1) + 12;
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ascent = as;
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descent = den->Height()+ 2 - dh;
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idx = idxp;
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}
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void
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MathBigopInset::draw(Painter & pain, int x, int y)
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{
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int ls;
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char c;
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char const *s;
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short t;
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if (sym < 256 || sym == LM_oint) {
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ls = 1;
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c = (sym == LM_oint) ? LM_int : sym;
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s = &c;
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t = LM_TC_BSYM;
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} else {
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s = name;
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ls = strlen(name);
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t = LM_TC_TEXTRM;
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}
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if (sym == LM_oint) {
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pain.arc(x, y - 5 * width / 4, width, width, 0, 360*64,
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LColor::mathline);
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++x;
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}
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pain.text(x, y, s, ls, mathed_get_font(t, size));
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}
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void
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MathBigopInset::Metrics()
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{
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int ls;
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char c;
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char const *s;
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short t;
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if (sym < 256 || sym == LM_oint) {
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ls = 1;
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c = (sym == LM_oint) ? LM_int: sym;
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s = &c;
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t = LM_TC_BSYM;
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} else {
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s = name;
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ls = strlen(name);
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t = LM_TC_TEXTRM;
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}
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mathed_string_height(t, size,
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reinterpret_cast<const unsigned char*>(s),
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ls, ascent, descent);
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width = mathed_string_width(t, size,
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reinterpret_cast<const unsigned char*>(s),
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ls);
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if (sym == LM_oint) width += 2;
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}
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